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Ursueguía D, Díaz E, Ordóñez S. Effect of Water and Carbon Dioxide on the Performance of Basolite Metal-Organic Frameworks for Methane Adsorption. Energy Fuels 2023; 37:14836-14844. [PMID: 37817863 PMCID: PMC10561151 DOI: 10.1021/acs.energyfuels.3c02393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/15/2023] [Indexed: 10/12/2023]
Abstract
MOFs are potential adsorbents for methane separation from nitrogen, including recovery in diluted streams. However, water and carbon dioxide can seriously affect the adsorption performance. Three commercial MOFs, basolite C300, F300, and A100, were studied under similar conditions to fugitive methane streams, such as water (75 and 100% relative humidity) and carbon dioxide (0.33%) presence in a fixed bed. The presence of available open metal sites of copper (Cu2+) and aluminum (Al3+) in the case of basolite C300 and A100, respectively, constitutes a clear drawback under humid conditions, since water adsorbs on them, leading to significant methane capacity losses. Surprisingly, basolite F300 is the most resistant material due to its amorphous structure, which hinders water access. The combination of carbon dioxide and water creates a synergy that seriously affects basolite A100, closely related to its breathing effect, but does not constitute an important issue for basolite C300 and F300.
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Affiliation(s)
- David Ursueguía
- Catalysis, Reactors and Control
Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Eva Díaz
- Catalysis, Reactors and Control
Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Catalysis, Reactors and Control
Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
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2
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Ursueguía D, Faba L, Díaz E, Caballero R, Ordóñez S. Dolomite industrial by-products as active material for CO 2 adsorption and catalyst for the acetone condensation. Waste Manag 2023; 168:431-439. [PMID: 37390798 DOI: 10.1016/j.wasman.2023.06.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 04/18/2023] [Accepted: 06/24/2023] [Indexed: 07/02/2023]
Abstract
The feasibility of using dolomite powders, by-product from the refractory industry, as a CO2 adsorbent and as a catalyst for the acetone liquid-phase self-condensation is demonstrated in this article. The performance of this material can be largely improved by combining physical pretreatments (hydrothermal ageing, sonication) and thermal activation at different temperatures (500-800 °C). The highest CO2 adsorption capacity was observed for the sample after sonication and activated at 500 °C (46 mg·g-1). As to the acetone condensation, the best results were obtained also with the sonicated dolomites, mainly after activation at 800 °C (17.4% of conversion after 5 h at 120 °C). The kinetic model reveals that this material optimizes the equilibrium between catalytic activity (proportional to the total basicity) and deactivation by water (specific adsorption process). These results demonstrate that the valorisation of dolomite fines is feasible, proposing attractive pretreatments for obtaining activated materials with promising results as adsorbents and basic catalysts.
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Affiliation(s)
- David Ursueguía
- Catalysis, Reactors and Control Research Group (CRC), Dept. of Chemical and Environmental Engineering. University of Oviedo, Julián Clavería s/n, Oviedo 33006, Spain
| | - Laura Faba
- Catalysis, Reactors and Control Research Group (CRC), Dept. of Chemical and Environmental Engineering. University of Oviedo, Julián Clavería s/n, Oviedo 33006, Spain
| | - Eva Díaz
- Catalysis, Reactors and Control Research Group (CRC), Dept. of Chemical and Environmental Engineering. University of Oviedo, Julián Clavería s/n, Oviedo 33006, Spain
| | | | - Salvador Ordóñez
- Catalysis, Reactors and Control Research Group (CRC), Dept. of Chemical and Environmental Engineering. University of Oviedo, Julián Clavería s/n, Oviedo 33006, Spain.
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3
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Ursueguía D, Daniel C, Collomb C, Cardenas C, Farrusseng D, Díaz E, Ordóñez S. Evaluation of HKUST-1 as Volatile Organic Compound Adsorbents for Respiratory Filters. Langmuir 2022; 38:14465-14474. [PMID: 36383640 DOI: 10.1021/acs.langmuir.2c02332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Cyclohexane is a representative of volatile organic compounds (VOCs). VOCs can cause serious health problems in case of continuous exposure; therefore, it is essential to develop efficient personal protective equipment. Historically, activated carbons are used as VOC adsorbents. However, the emergence of promising novel adsorbents, such as metal-organic frameworks, has pushed the research to study their behavior under the same conditions. In this work, the use of the well-known HKUST-1 MOF of different particle sizes (20 μm, 300-600 μm, and 1-1.18 mm) for the adsorption of low-grade (5000 ppm) cyclohexane combined with different water concentrations (dry, 27 and 80% RH) in a fixed bed is proposed. The results were compared under the same conditions for a typically used activated carbon, PICACTIF TA 60. HKUST-1 has higher affinity to cyclohexane than PICACTIF for the whole pressure range studied, especially at low partial pressures. It begins to adsorb much earlier (0.0025 kPa) than the activated carbon (0.01 kPa). However, a different adsorption behavior is evidenced for both materials in the presence of water vapor since HKUST-1 is very hydrophilic in the zone near to the copper open metal sites, whereas PICACTIF is hydrophobic. After three consecutive cycles, good stability results were obtained for the MOF, comparable to activated carbon, even in the presence of water. As the main finding, although the unstability of HKUST-1 is well established under high humid conditions, the kinetic of degradation has not been established so far. Here, it is shown that the time usage of HKUST-1 as the adsorbent for respiratory mask (single pass) is not affected by the degradation of the structure, which may occur on a longer time scale. Finally, shaping by tableting provides good results since it is possible to increase the MOF density by around 69% with minor loss of adsorption capacity. The best fraction is 300-600 μm, reaching cyclohexane breakthrough times around 85 min/cm3 at 80% RH, comparable with PICACTIF-activated carbon and promising for practical applications.
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Affiliation(s)
- D Ursueguía
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne F-69626, France
- Catalysis, Reactors and Control Research Group (CRC), Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, Oviedo 33006, Spain
| | - C Daniel
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne F-69626, France
| | - C Collomb
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne F-69626, France
| | - C Cardenas
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne F-69626, France
| | - D Farrusseng
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne F-69626, France
| | - E Díaz
- Catalysis, Reactors and Control Research Group (CRC), Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, Oviedo 33006, Spain
| | - S Ordóñez
- Catalysis, Reactors and Control Research Group (CRC), Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, Oviedo 33006, Spain
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Álvarez M, Marín P, Ordóñez S. Upgrading of methane emissions via chemical looping over copper-zeolites: Experiments and modelling. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ursueguía D, Díaz E, Ordóñez S. Metal-Organic Frameworks (MOFs) as methane adsorbents: From storage to diluted coal mining streams concentration. Sci Total Environ 2021; 790:148211. [PMID: 34111784 DOI: 10.1016/j.scitotenv.2021.148211] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 05/29/2021] [Accepted: 05/29/2021] [Indexed: 05/25/2023]
Abstract
Ventilation Air Methane emissions (VAM) from coal mines lead to environmental concern because their high global warming potential and the loss of methane resources. VAM upgrading requires pre-concentration processes dealing with high flow rates of very diluted streams (<1% methane). Therefore, methane separation and concentration is technically challenging and has important environmental and safety concerns. Among the alternatives, adsorption on Metal-Organic Frameworks (MOFs) could be an interesting option to methane selective separation, due to its tuneable character and outstanding physical properties. Most of the works devoted to the methane adsorption on MOFs deal with methane storage. Therefore, these works were reviewed to determine the properties governing methane-MOF interactions. In addition, the metallic ions and organic linkers roles have been identified. With these premises, decisive effects in the methane adsorption selectivity in nitrogen/methane lean mixtures have been discussed, since nitrogen is the most concentrated gas in the VAM stream, and it is very similar to methane molecule. In order to fulfill this overview, the effect of other aspects, such as the presence of polar compounds (moisture and carbon dioxide), was also considered. In addition, engineering considerations in the operation of fixed bed adsorption units and the main challenges associated to MOFs as adsorbents were also discussed.
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Affiliation(s)
- David Ursueguía
- Catalysis, Reactors and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Eva Díaz
- Catalysis, Reactors and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Catalysis, Reactors and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain.
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6
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Affiliation(s)
- Laura Faba
- Catalysis, Reactors & Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Oviedo 33006, Spain
| | - Juan Gancedo
- Catalysis, Reactors & Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Oviedo 33006, Spain
| | - Jorge Quesada
- Catalysis, Reactors & Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Oviedo 33006, Spain
| | - Eva Diaz
- Catalysis, Reactors & Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Oviedo 33006, Spain
| | - Salvador Ordóñez
- Catalysis, Reactors & Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Oviedo 33006, Spain
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7
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García L, Leyva-Díaz JC, Díaz E, Ordóñez S. A review of the adsorption-biological hybrid processes for the abatement of emerging pollutants: Removal efficiencies, physicochemical analysis, and economic evaluation. Sci Total Environ 2021; 780:146554. [PMID: 33774301 DOI: 10.1016/j.scitotenv.2021.146554] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 02/26/2021] [Accepted: 03/13/2021] [Indexed: 06/12/2023]
Abstract
The limited efficiency of conventional wastewater treatment plants (WWTPs) in emerging pollutants (EPs) removal encourages the development of alternative technologies for the adequate treatment of wastewater, due to its adverse effects on human health and ecosystems. The biological, physical or chemical hybrid technologies to treat EPs results interesting since they can enhance the performance of WWTPs. Among them, hybrid adsorption/biological technology could offer different possibilities that are explored in this work (PAC-MBR, PACT/GAC-CAS, BAC configurations). In this way, different variations in the adsorption process have been considered: the form of the adsorbent, the feed to the system, and the type of biological process, either conventional activated sludge (CAS), membrane bioreactor (MBR) or biofilm systems. For each combination, the removal efficiency of micropollutants, classified according to their use into pharmaceuticals, personal care products (PCPs) and other micropollutants (mainly benzotriazoles) was analysed. From reported data, it was observed a beneficial synergistic effect of dipole moment and octanol-water partition coefficient on the removal efficiency of micropollutants by adsorption/biological hybrid technology. Finally, a preliminary economic evaluation of the powdered activated carbon in a conventional activated sludge reactor (PACT), powdered activated carbon-membrane bioreactor (PAC-MBR) and biological activated carbon (BAC) hybrid systems was carried out by analysing the capital expenditure (CAPEX) of plants for capacities up to 75,000 m3d-1. Likewise, estimations of adsorbent concentration for a hypothetical plant with a capacity of 10,000 m3d-1 is presented. Among these hybrid configurations, PAC-MBR achieved the highest micropollutant elimination percentages; however, it presents the highest CAPEX and activated carbon requirements.
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Affiliation(s)
- Laura García
- Catalysis, Reactors, and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Juan Carlos Leyva-Díaz
- Catalysis, Reactors, and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Eva Díaz
- Catalysis, Reactors, and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Catalysis, Reactors, and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain.
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8
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Álvarez M, Marín P, Ordóñez S. Harnessing of Diluted Methane Emissions by Direct Partial Oxidation of Methane to Methanol over Cu/Mordenite. Ind Eng Chem Res 2021; 60:9409-9417. [PMID: 35273425 PMCID: PMC8900128 DOI: 10.1021/acs.iecr.1c01069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 06/11/2021] [Accepted: 06/13/2021] [Indexed: 11/28/2022]
Abstract
![]()
The upgrading of diluted methane
emissions into valuable products
can be accomplished at low temperatures (200 °C) by the direct
partial oxidation of methanol over copper-exchanged zeolite catalysts.
The reaction has been studied in a continuous fixed-bed reactor loaded
with a Cu–mordenite catalyst, according to a three-step cyclic
process: adsorption of methane, desorption of methanol, and reactivation
of the catalyst. The purpose of the work is the use of methane emissions
as feedstocks, which is challenging due to their low methane concentration
and the presence of oxygen. Methane concentration had a marked influence
on methane adsorption and methanol production (decreased from 164
μmol/g Cu for pure methane to 19 μmol/g Cu for 5% methane).
The presence of oxygen, even in low concentrations (2.5%), reduced
methane adsorption drastically. However, methanol production was only
affected slightly (average decrease of 9%), concluding that methane
adsorbed on the active centers yielding methanol is not influenced
by oxygen.
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Affiliation(s)
- Mauro Álvarez
- Catalysis, Reactors and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería 8, 33006 Oviedo, Spain
| | - Pablo Marín
- Catalysis, Reactors and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería 8, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Catalysis, Reactors and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería 8, 33006 Oviedo, Spain
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9
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Rapado P, Faba L, Ordóñez S. Influence of delignification and reaction conditions in the aqueous phase transformation of lignocellulosic biomass to platform molecules. Bioresour Technol 2021; 321:124500. [PMID: 33310411 DOI: 10.1016/j.biortech.2020.124500] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/29/2020] [Accepted: 11/30/2020] [Indexed: 06/12/2023]
Abstract
The effect of oxidative and reductive delignification processes on the hydrolysis of pine sawdust at mild conditions (200-1000 ppm of HCl and 140-220 °C) is studied in this work. Dimers and reduced sugars are the main products obtained with the fresh sawdust (>82%), reaching a maximum liquid phase yield of 17% after 8 h, at the strongest conditions. This conversion increases up to almost 40% with the pretreated sawdust, obtaining selectivities higher than 87% of levulinic acid and a well-defined distribution of the relevant platform molecules (sugars, HMF, furfural, levulinic acid) as function of the severity of the reaction, decreasing the humins formation and being possible to define different conditions to maximize each yield. These conclusions were corroborated by the kinetic analysis, obtaining a clear decrease in the energy activation for all the individual steps involved in this process.
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Affiliation(s)
- Paula Rapado
- Catalysis, Reactors and Control Research Group (CRC), Dept. of Chemical and Environmental Engineering, University of Oviedo, Oviedo 33006, Spain
| | - Laura Faba
- Catalysis, Reactors and Control Research Group (CRC), Dept. of Chemical and Environmental Engineering, University of Oviedo, Oviedo 33006, Spain
| | - Salvador Ordóñez
- Catalysis, Reactors and Control Research Group (CRC), Dept. of Chemical and Environmental Engineering, University of Oviedo, Oviedo 33006, Spain.
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Ursueguía D, Díaz E, Vega A, Ordóñez S. Methane separation from diluted mixtures by fixed bed adsorption using MOFs: Model validation and parametric studies. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117374] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Ursueguía D, Díaz E, Ordóñez S. Densification-Induced Structure Changes in Basolite MOFs: Effect on Low-Pressure CH 4 Adsorption. Nanomaterials (Basel) 2020; 10:E1089. [PMID: 32492794 PMCID: PMC7353190 DOI: 10.3390/nano10061089] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 05/18/2020] [Accepted: 05/19/2020] [Indexed: 11/17/2022]
Abstract
Metal-organic frameworks' (MOFs) adsorption potential is significantly reduced by turning the original powder into pellets or granules, a mandatory step for their use at industrial scale. Pelletization is commonly performed by mechanical compression, which often induces the amorphization or pressure-induced phase transformations. The objective of this work is the rigorous study of the impact of mechanical pressure (55.9, 111.8 and 186.3 MPa) onto three commercial materials (Basolite C300, F300 and A100). Phase transformations were determined by powder X-ray diffraction analysis, whereas morphological changes were followed by nitrogen physisorption. Methane adsorption was studied in an atmospheric fixed bed. Significant crystallinity losses were observed, even at low applied pressures (up to 69.9% for Basolite C300), whereas a structural change occurred to Basolite A100 from orthorhombic to monoclinic phases, with a high cell volume reduction (13.7%). Consequently, adsorption capacities for both methane and nitrogen were largely reduced (up to 53.6% for Basolite C300), being related to morphological changes (surface area losses). Likewise, the high concentration of metallic active centers (Basolite C300), the structural breathing (Basolite A100) and the mesopore-induced formation (Basolite F300) smooth the dramatic loss of capacity of these materials.
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Affiliation(s)
| | | | - Salvador Ordóñez
- Catalysis, Reactors and Control Research Group (CRC), Department of Chemical and Environmental Engineering, University of Oviedo, 33006-Oviedo, Spain; (D.U.); (E.D.)
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12
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Quesada J, Faba L, Díaz E, Ordóñez S. Effect of catalyst morphology and hydrogen co-feeding on the acid-catalysed transformation of acetone into mesitylene. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02288k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Surface chemistry and pore topology affect mesitylene selectivity in acid-catalysed acetone condensation. Hydrogen improves both catalyst stability and condensation selectivity.
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Affiliation(s)
- Jorge Quesada
- Catalysis, Reactors and Control Research Group (CRC)
- Department of Chemical and Environmental engineering
- University of Oviedo
- Spain
| | - Laura Faba
- Catalysis, Reactors and Control Research Group (CRC)
- Department of Chemical and Environmental engineering
- University of Oviedo
- Spain
| | - Eva Díaz
- Catalysis, Reactors and Control Research Group (CRC)
- Department of Chemical and Environmental engineering
- University of Oviedo
- Spain
| | - Salvador Ordóñez
- Catalysis, Reactors and Control Research Group (CRC)
- Department of Chemical and Environmental engineering
- University of Oviedo
- Spain
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13
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Faba L, Garcés D, Díaz E, Ordóñez S. Carbon Materials as Phase-Transfer Promoters for Obtaining 5-Hydroxymethylfurfural from Cellulose in a Biphasic System. ChemSusChem 2019; 12:3769-3777. [PMID: 31240829 DOI: 10.1002/cssc.201901264] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/04/2019] [Indexed: 06/09/2023]
Abstract
Different carbonaceous materials were tested as mass-transfer promoters for increasing the yield of 5-hydroxymethylfurfural (5-HMF) in biphasic cellulose hydrolysis. The benefits of working with a biphasic system (water/methyl isobutyl ketone) under soft acid conditions were taken as starting point (no humins or levulinic acid production), with slow extraction kinetics as the weakest point of this approach. Carbon nanotubes (CNTs) and activated carbon (AC) were proposed to improve 5-HMF liquid-liquid mass transfer. A kinetic analysis of the extraction process indicated the competition between 5-HMF and glucose adsorption as the main cause of the poor results obtained with AC. In contrast, very promising results were obtained with CNTs, mainly at 1.5 wt % loading, with complete transfer of HMF and a high global mass-transfer coefficient. The use of CNTs improved the amount of 5-HMF in the organic phase by more than 270 %.
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Affiliation(s)
- Laura Faba
- CRC Research Group, Department of Chemical and Environmental Engineering, University of Oviedo, c/ Julián Clavería s/n, 33006, Oviedo, Spain
| | - Diego Garcés
- CRC Research Group, Department of Chemical and Environmental Engineering, University of Oviedo, c/ Julián Clavería s/n, 33006, Oviedo, Spain
| | - Eva Díaz
- CRC Research Group, Department of Chemical and Environmental Engineering, University of Oviedo, c/ Julián Clavería s/n, 33006, Oviedo, Spain
| | - Salvador Ordóñez
- CRC Research Group, Department of Chemical and Environmental Engineering, University of Oviedo, c/ Julián Clavería s/n, 33006, Oviedo, Spain
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Krivtsov I, Ilkaeva M, García‐López EI, Marcì G, Palmisano L, Bartashevich E, Grigoreva E, Matveeva K, Díaz E, Ordóñez S. Effect of Substituents on Partial Photocatalytic Oxidation of Aromatic Alcohols Assisted by Polymeric C
3
N
4. ChemCatChem 2019. [DOI: 10.1002/cctc.201900362] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Igor Krivtsov
- Department of Organic and Inorganic ChemistryUniversity of Oviedo-CINN Julián Clavería 8 33006 Oviedo Spain
- Nanotechnology Education and Research CenterSouth Ural State University 454080 Chelyabinsk Russia
| | - Marina Ilkaeva
- Department of Organic and Inorganic ChemistryUniversity of Oviedo-CINN Julián Clavería 8 33006 Oviedo Spain
| | - Elisa I. García‐López
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF)University of Palermo 90128 Palermo Italy
| | - Giuseppe Marcì
- “Schiavello-Grillone” Photocatalysis Group. Dipartimento di Ingegneria (DI)University of Palermo 90128 Palermo Italy
| | - Leonardo Palmisano
- “Schiavello-Grillone” Photocatalysis Group. Dipartimento di Ingegneria (DI)University of Palermo 90128 Palermo Italy
| | - Ekaterina Bartashevich
- Department of Theoretical and Applied ChemistrySouth Ural State University 454080 Chelyabinsk Russia
| | - Ekaterina Grigoreva
- Department of Theoretical and Applied ChemistrySouth Ural State University 454080 Chelyabinsk Russia
| | - Ksenia Matveeva
- Department of Theoretical and Applied ChemistrySouth Ural State University 454080 Chelyabinsk Russia
| | - Eva Díaz
- Department of Chemical and Environmental EngineeringUniversity of Oviedo 33006 Oviedo Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental EngineeringUniversity of Oviedo 33006 Oviedo Spain
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15
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Leyva-Díaz JC, Phonbun RA, Taggart J, Díaz E, Ordóñez S. Influence of nalidixic acid on tandem heterotrophic-autotrophic kinetics in a "NIPHO" activated sludge reactor. Chemosphere 2019; 218:128-137. [PMID: 30471493 DOI: 10.1016/j.chemosphere.2018.11.107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 10/22/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
This work analyzes the effect of nalidixic acid (NAL) on the kinetics of the heterotrophic and autotrophic biomass growth within a "NIPHO" activated sludge reactor treating municipal wastewater. Thus, the effect of this chemical in the degradation rates of carbon and nitrogen sources and net biomass growth rate is evaluated. Activated sludge samples were taken at three different operation conditions, changing the values of hydraulic retention time (2.8-3.8 h), biomass concentration (1400-1700 mgVSS L-1), temperature (12.6-14.8 °C), and sludge retention time (11.0-12.6 day). A respirometric method was applied to model the kinetic performance of heterotrophic and autotrophic biomass in absence and presence of NAL, and a multivariable statistical analysis was carried out to characterize the influence of the operation variables on the kinetic response of the system, which was finally optimized. The results showed that there was no inhibitory effect of NAL on heterotrophic biomass, with an increase of net heterotrophic biomass growth rate from 1.70 to 6.73 mgVSS L-1 h-1 at the most favorable period. By contrast, the autotrophic biomass was negatively affected by NAL, reducing the value of net autotrophic biomass growth rate from 25.37 to 10.29 mgVSS L-1 h-1 at the best operation conditions. In general, biomass concentration and temperature had the highest influence on the degradation rate of carbon and nitrogen sources, whereas hydraulic retention time and sludge retention time were the most influential on net heterotrophic and autotrophic biomass growth rates.
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Affiliation(s)
- J C Leyva-Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, 33006, Oviedo, Spain.
| | - R A Phonbun
- Department of Chemical and Process Engineering, University of Strathclyde, G11XJ, Glasgow, United Kingdom
| | - J Taggart
- Department of Chemical and Process Engineering, University of Strathclyde, G11XJ, Glasgow, United Kingdom
| | - E Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, 33006, Oviedo, Spain
| | - S Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, 33006, Oviedo, Spain.
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Garcés D, Faba L, Díaz E, Ordóñez S. Aqueous-Phase Transformation of Glucose into Hydroxymethylfurfural and Levulinic Acid by Combining Homogeneous and Heterogeneous Catalysis. ChemSusChem 2019; 12:924-934. [PMID: 30548530 DOI: 10.1002/cssc.201802315] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 12/07/2018] [Indexed: 06/09/2023]
Abstract
Homogeneous (HCl) and heterogeneous catalysts (various zeolites) were combined to enhance the upgrading of glucose into two different platform molecules: 5-hydroxymethylfurfural (HMF) and levulinic acid (LA). β-Zeolite was the most active material for the glucose isomerization to fructose, improving also the activity of HCl for the subsequent steps. Reaction time, temperature, and pH were then modified, identifying 140 °C, 200 ppm of HCl, and 5 h as the optimum conditions for HMF formation (41 % selectivity; 0.06 mol L-1 ) and 140 °C, 400 ppm of HCl, and 24 h for LA formation (34 % selectivity; 0.12 mol L-1 ). This new approach is also relevant because of significant changes to the mechanism for humins formation. All results are successfully fitted to a kinetic model simultaneously considering both catalytic mechanisms.
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Affiliation(s)
- Diego Garcés
- Department of Chemical and Environmental Engineering, University of Oviedo, C/Julián Clavería, s/n-33006, Oviedo, Asturias, Spain
| | - Laura Faba
- Department of Chemical and Environmental Engineering, University of Oviedo, C/Julián Clavería, s/n-33006, Oviedo, Asturias, Spain
| | - Eva Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, C/Julián Clavería, s/n-33006, Oviedo, Asturias, Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, C/Julián Clavería, s/n-33006, Oviedo, Asturias, Spain
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17
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Díaz E, Stożek S, Patiño Y, Ordóñez S. Electrochemical degradation of naproxen from water by anodic oxidation with multiwall carbon nanotubes glassy carbon electrode. Water Sci Technol 2019; 79:480-488. [PMID: 30924802 DOI: 10.2166/wst.2019.070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Naproxen (NPX) degradation was investigated by anodic oxidation both at constant potential and by cyclic voltammetry, using this last technique for optimizing reaction conditions and catalyst properties. Three multiwall carbon nanotubes (MWCNTs)-promoted electrodes were used (MWCNT, MWCNT-COOH and MWCNT-NH2) and a two steps oxidation process was observed in all the cases. At the optimized conditions (volume of MWCNT = 15 μL), the influence of the scan rate indicates the diffusion-adsorption control of the process. Likewise, the kinetic study of NPX degradation at fix potential, considering two different stirring speeds (250 and 500 rpm), indicates that degradation rate increases with the stirring speed. After 20 h, NPX is degraded even an 82.5%, whereas the mineralization reaches almost 70%, as it was obtained from total organic carbon analysis. The pH effect was also analysed, in the range 5-11, observing a positive effect at low pH. Concerning the surface chemistry of the electrode, MWCNT-NH2, with the highest isoelectric point (4.70), is the most promising material due to the improved interactions with the reactant. From these observations, a pathway is proposed, which includes two steps of electrochemical oxidation followed by subsequent oxidation steps, until mineralization of the NPX, attributed mainly to active chlorine species and ·OH.
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Affiliation(s)
- Eva Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain E-mail:
| | - Sonia Stożek
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain E-mail:
| | - Yolanda Patiño
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain E-mail:
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain E-mail:
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Díaz E, Pintado L, Faba L, Ordóñez S, González-LaFuente JM. Effect of sewage sludge composition on the susceptibility to spontaneous combustion. J Hazard Mater 2019; 361:267-272. [PMID: 30199826 DOI: 10.1016/j.jhazmat.2018.08.094] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 08/26/2018] [Accepted: 08/29/2018] [Indexed: 06/08/2023]
Abstract
The different technologies applied to the sewage sludge management have in common a first step devoted to the storage. In the case of dried sludges, this storage leads to important safety concerns because of the explosive character of the resulting dusts. In order to ensure safety in the storage step, it is necessary to evaluate the spontaneous combustion trends on terms of measurable chemical and physical properties of the dried sludges. In order to accomplish this scope, twelve samples from different wastewater treatment plants were characterized, correlating the susceptibility to spontaneous combustion with both the sludge composition and the heating value. Equations traditionally used for coals were used to determine the higher heating value from the chemical composition, finding as main source of error the high oxygen content of the sludge samples. Concerning the thermal susceptibility, different parameters were obtained (Maciejasz Index, induction temperature, maximum weight loss temperature, characteristic temperature and activation energy), being in all cases the spontaneous combustions favored by high H/C and low O/C ratios. Likewise, the presence of sulphur in the dried sludge was found to increase the thermal susceptibility of the material. This effect is tentatively explained with the formation of pyrophoric iron sulfides.
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Affiliation(s)
- Eva Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain.
| | - Lucía Pintado
- Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Laura Faba
- Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
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Ilkaeva M, Krivtsov I, García JR, Díaz E, Ordóñez S, García-López EI, Marcì G, Palmisano L, Maldonado MI, Malato S. Selective photocatalytic oxidation of 5-hydroxymethyl-2-furfural in aqueous suspension of polymeric carbon nitride and its adduct with H2O2 in a solar pilot plant. Catal Today 2018. [DOI: 10.1016/j.cattod.2018.03.013] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Affiliation(s)
- Jorge Quesada
- Department of Chemical and Environmental Engineering; University of Oviedo; Av. Julián Clavería s/n, Oviedo 33006 Spain
| | - Laura Faba
- Department of Chemical and Environmental Engineering; University of Oviedo; Av. Julián Clavería s/n, Oviedo 33006 Spain
| | - Eva Díaz
- Department of Chemical and Environmental Engineering; University of Oviedo; Av. Julián Clavería s/n, Oviedo 33006 Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering; University of Oviedo; Av. Julián Clavería s/n, Oviedo 33006 Spain
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21
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Patiño Y, Díaz E, Lobo-Castañón MJ, Ordóñez S. Carbon nanotube modified glassy carbon electrode for electrochemical oxidation of alkylphenol ethoxylate. Water Sci Technol 2018; 77:2436-2444. [PMID: 29893732 DOI: 10.2166/wst.2018.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Electrochemical oxidation of an emerging pollutant, 2-(4-methylphenoxy)ethanol (MPET), from water has been studied by cyclic voltammetry (CV). Multiwall carbon nanotubes glassy carbon electrodes (MWCNT-GCE) were used as working electrode due to their extraordinary properties. The oxidation process is irreversible, since no reduction peaks were observed in the reverse scan. The electrocatalytic effect of MWCNT was confirmed as the oxidation peak intensity increases in comparison to bare-GCE. The effect of functional groups on MWCNT was also studied by MWCNT functionalized with NH2 (MWCNT-NH2) and COOH (MWCNT-COOH) groups. The oxidation peak current decreases in the following order: MWCNT > MWCNT-NH2 > MWCNT-COOH. Taking into account the normalized peak current, MWCNT-NH2 exhibits the best results due to its strong interaction with MPET. Under optimal conditions (pH = 5.0 and volume of MWCNT = 10 μL), degradation was studied for MWCNT-GCE and MWCNT-NH2-GCE. A complete MPET removal was observed using MWCNT-GCE after four CV cycles, for a volume/area (V/A) ratio equal to 19. In the case of MWCNT-NH2-GCE, the maximum MPET removal was close to 90% for V/A = 37, higher than that obtained for MWCNT-GCE at the same conditions (≈80%). In both cases, no organic by-products were detected.
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Affiliation(s)
- Yolanda Patiño
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, Oviedo 33006, Spain
| | - Eva Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, Oviedo 33006, Spain
| | - María Jesús Lobo-Castañón
- Department of Physical and Analytical Chemistry, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, Oviedo 33006, Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, Oviedo 33006, Spain
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22
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Patiño Y, Mantecón LG, Polo S, Faba L, Díaz E, Ordóñez S. Effect of sludge features and extraction-esterification technology on the synthesis of biodiesel from secondary wastewater treatment sludges. Bioresour Technol 2018; 247:209-216. [PMID: 28950128 DOI: 10.1016/j.biortech.2017.09.058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 09/06/2017] [Accepted: 09/07/2017] [Indexed: 06/07/2023]
Abstract
Secondary sludge from municipal wastewater treatment plant is proposed as a promising alternative lipid feedstock for biodiesel production. A deep study combining different type of raw materials (sludge coming from the oxic, anoxic and anaerobic steps of the biological treatment) with different technologies (liquid-liquid and solid-liquid extractions followed by acid catalysed transesterification and in situ extraction-transesterification procedure) allows a complete comparison of available technologies. Different parameters - contact time, catalyst concentration, pretreatments - were considered, obtaining more than 17% FAMEs yield after 50min of sonication with the in situ procedure and 5% of H2SO4. This result corresponds to an increment of more than 65% respect to the best results reported at typical conditions. Experimental data were used to propose a mathematical model for this process, demonstrating that the mass transfer of lipids from the sludge to the liquid is the limiting step.
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Affiliation(s)
- Yolanda Patiño
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Laura G Mantecón
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Sara Polo
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Laura Faba
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Eva Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain.
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23
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Ilkaeva M, Krivtsov I, Díaz E, Amghouz Z, Patiño Y, Khainakov S, García JR, Ordóñez S. Photocatalytic degradation of 2-(4-methylphenoxy)ethanol over TiO 2 spheres. J Hazard Mater 2017; 332:59-69. [PMID: 28282571 DOI: 10.1016/j.jhazmat.2017.02.055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Revised: 01/26/2017] [Accepted: 02/26/2017] [Indexed: 06/06/2023]
Abstract
The photocatalytic TiO2-assisted decomposition of 2-(4-methylphenoxy)ethanol (MPET) in aqueous solution has been studied for the first time. The intermediate compounds of MPET photodegradation have been also determined. A toxic p-cresol is formed in significant quantities during the photocatalytic reaction. A solvent-exchange approach for a template-free preparation of spherical TiO2 particles has been described, which is based solely on precipitation of hydrous titania from aqueous titanium peroxo complex by using organic solvents. The proposed method favours the formation of spherical titania particles with a mean size varying from 50 to 260nm depending on the choice of solvent. The procedure for converting nonporous titania spheres into mesoporous material maintaining the same spherical morphology has been developed. The synthesized TiO2 spheres demonstrate a degree of MPET photo-degradation close to that of the commercial titania Aeroxide P25, besides being successfully recovered and reused for four reaction cycles without loss of photocatalytic activity. The effectiveness of the commercial Aeroxide P25 in MPET photodegradation, on the other hand, suffers 10-time drop during the third reaction cycle, which is attributed to its poor recoverability because the photocatalyst is composed of small particles of 20nm size.
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Affiliation(s)
- Marina Ilkaeva
- Department of Organic and Inorganic Chemistry, University of Oviedo-CINN, 33006, Oviedo, Spain; Nanotechnology Education and Research Center, South Ural State University, 454080, Chelyabinsk, Russia
| | - Igor Krivtsov
- Department of Organic and Inorganic Chemistry, University of Oviedo-CINN, 33006, Oviedo, Spain; Nanotechnology Education and Research Center, South Ural State University, 454080, Chelyabinsk, Russia.
| | - Eva Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, 33006, Oviedo, Spain
| | - Zakariae Amghouz
- Department of Materials Science and Metallurgical Engineering, University of Oviedo, Campus Universitario, 33203 Gijón, Spain
| | - Yolanda Patiño
- Department of Chemical and Environmental Engineering, University of Oviedo, 33006, Oviedo, Spain
| | - Sergei Khainakov
- Scientific Technical Services, University of Oviedo, 33006, Oviedo, Spain
| | - José R García
- Department of Organic and Inorganic Chemistry, University of Oviedo-CINN, 33006, Oviedo, Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, 33006, Oviedo, Spain
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Garcés D, Díaz E, Ordóñez S. Aqueous Phase Conversion of Hexoses into 5-Hydroxymethylfurfural and Levulinic Acid in the Presence of Hydrochloric Acid: Mechanism and Kinetics. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b00952] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Diego Garcés
- Department of Chemical and
Environmental Engineering, University of Oviedo, Julián
Clavería s/n, 33006 Oviedo, Spain
| | - Eva Díaz
- Department of Chemical and
Environmental Engineering, University of Oviedo, Julián
Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Department of Chemical and
Environmental Engineering, University of Oviedo, Julián
Clavería s/n, 33006 Oviedo, Spain
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Cueto J, Faba L, Díaz E, Ordóñez S. Cyclopentanone as an Alternative Linking Reactant for Heterogeneously Catalyzed Furfural Aldol Condensation. ChemCatChem 2017. [DOI: 10.1002/cctc.201601655] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jennifer Cueto
- Department of Chemical and Environmental Engineering; University of Oviedo; C/ Julián Clavería s/n-33006- Oviedo-Asturias Spain
| | - Laura Faba
- Department of Chemical and Environmental Engineering; University of Oviedo; C/ Julián Clavería s/n-33006- Oviedo-Asturias Spain
| | - Eva Díaz
- Department of Chemical and Environmental Engineering; University of Oviedo; C/ Julián Clavería s/n-33006- Oviedo-Asturias Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering; University of Oviedo; C/ Julián Clavería s/n-33006- Oviedo-Asturias Spain
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Patiño Y, Pilehvar S, Díaz E, Ordóñez S, De Wael K. Electrochemical reduction of nalidixic acid at glassy carbon electrode modified with multi-walled carbon nanotubes. J Hazard Mater 2017; 323:621-631. [PMID: 27776850 DOI: 10.1016/j.jhazmat.2016.10.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/25/2016] [Accepted: 10/12/2016] [Indexed: 06/06/2023]
Abstract
The aqueous phase electrochemical degradation of nalidixic acid (NAL) is studied in this work, using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) as instrumental techniques. The promotional effect of multi-walled carbon nanotubes (MWCNT) on the performance of glassy carbon electrodes is demonstrated, being observed that these materials catalyze the NAL reduction. The effect of surface functional groups on MWCNT -MWCNT-COOH and MWCNT-NH2-was also studied. The modification of glassy carbon electrode (GCE) with MWCNT leads to an improved performance for NAL reduction following the order of MWCNT>MWCNT-NH2>MWCNT-COOH. The best behavior at MWCNT-GCE is mainly due to both the increased electrode active area and the enhanced MWCNT adsorption properties. The NAL degradation was carried out under optimal conditions (pH=5.0, deposition time=20s and volume of MWCNT=10μL) using MWCNT-GCE obtaining an irreversible reduction of NAL to less toxic products. Paramaters as the number of DPV cycles and the volume/area (V/A) ratio were optimized for maximize pollutant degradation. It was observed that after 15 DPV scans and V/A=8, a complete reduction was obtained, obtaining two sub-products identified by liquid chromatography-mass spectrometry (LC-MS).
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Affiliation(s)
- Yolanda Patiño
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Sanaz Pilehvar
- AXES Research Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Eva Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain.
| | - Karolien De Wael
- AXES Research Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
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Affiliation(s)
- Eva Díaz
- Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Aurelio Vega
- Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
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30
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Affiliation(s)
- Laura Faba
- Department of Chemical and Environmental Engineering; University of Oviedo; C/Julián Clavería s/n 33006 Oviedo Spain
| | - Eva Díaz
- Department of Chemical and Environmental Engineering; University of Oviedo; C/Julián Clavería s/n 33006 Oviedo Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering; University of Oviedo; C/Julián Clavería s/n 33006 Oviedo Spain
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31
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González C, Marín P, Díez FV, Ordóñez S. Gas-Phase Hydrodeoxygenation of Benzaldehyde, Benzyl Alcohol, Phenyl Acetate, and Anisole over Precious Metal Catalysts. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00036] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Celeste González
- Department
of Chemical and
Environmental Engineering, Facultad de Química, University of Oviedo, Julián Clavería 8, Oviedo 33006, Spain
| | - Pablo Marín
- Department
of Chemical and
Environmental Engineering, Facultad de Química, University of Oviedo, Julián Clavería 8, Oviedo 33006, Spain
| | - Fernando V. Díez
- Department
of Chemical and
Environmental Engineering, Facultad de Química, University of Oviedo, Julián Clavería 8, Oviedo 33006, Spain
| | - Salvador Ordóñez
- Department
of Chemical and
Environmental Engineering, Facultad de Química, University of Oviedo, Julián Clavería 8, Oviedo 33006, Spain
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32
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Garcés D, Díaz E, Sastre H, Ordóñez S, González-LaFuente JM. Evaluation of the potential of different high calorific waste fractions for the preparation of solid recovered fuels. Waste Manag 2016; 47:164-173. [PMID: 26318421 DOI: 10.1016/j.wasman.2015.08.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 08/20/2015] [Accepted: 08/20/2015] [Indexed: 06/04/2023]
Abstract
Solid recovered fuels constitute a valuable alternative for the management of those non-hazardous waste fractions that cannot be recycled. The main purpose of this research is to assess the suitability of three different wastes from the landfill of the local waste management company (COGERSA), to be used as solid recovered fuels in a cement kiln near their facilities. The wastes analyzed were: End of life vehicles waste, packaging and bulky wastes. The study was carried out in two different periods of the year: November 2013 and April 2014. In order to characterize and classify these wastes as solid recovered fuels, they were separated into homogeneous fractions in order to determine different element components, such as plastics, cellulosic materials, packagings or textile compounds, and the elemental analysis (including chlorine content), heavy metal content and the heating value of each fraction were determined. The lower heating value of the waste fractions on wet basis varies between 10 MJ kg(-1) and 42 MJ kg(-1). One of the packaging wastes presents a very high chlorine content (6.3 wt.%) due to the presence of polyvinylchloride from pipe fragments, being the other wastes below the established limits. Most of the wastes analyzed meet the heavy metals restrictions, except the fine fraction of the end of life vehicles waste. In addition, none of the wastes exceed the mercury limit content, which is one of the parameters considered for the solid recovered fuels classification. A comparison among the experimental higher heating values and empirical models that predict the heating value from the elemental analysis data was carried out. Finally, from the three wastes measured, the fine fraction of the end of life vehicles waste was discarded for its use as solid recovered fuels due to the lower heating value and its high heavy metals content. From the point of view of the heating value, the end of life vehicles waste was the most suitable residue with a lower heating value of 35.89 MJ kg(-1), followed by the packaging waste and the bulky waste, respectively. When mixing the wastes studied a global waste was obtained, whose classification as solid recovered fuels was NCV 1 Cl 3 Hg 3. From the empirical models used for calculating higher heating value from elemental content, Scheurer-Kestner was the model that best fit the experimental data corresponding to the wastes collected in November 2013, whereas Chang equation was the most approximate to the experimental heating values for April 2014 fractions. This difference is due to higher chlorine content of the second batch of wastes, since Chang equation is the only one that incorporates the chlorine content.
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Affiliation(s)
- Diego Garcés
- Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Eva Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Herminio Sastre
- Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain.
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Patiño Y, Díaz E, Ordóñez S, Gallegos-Suarez E, Guerrero-Ruiz A, Rodríguez-Ramos I. Adsorption of emerging pollutants on functionalized multiwall carbon nanotubes. Chemosphere 2015; 136:174-180. [PMID: 25989605 DOI: 10.1016/j.chemosphere.2015.04.089] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 03/04/2015] [Accepted: 04/19/2015] [Indexed: 06/04/2023]
Abstract
Adsorption of three representative emerging pollutants - 1,8-dichlorooctane, nalidixic acid and 2-(4-methylphenoxy)ethanol- on different carbon nanotubes was studied in order to determine the influence of the morphological and chemical properties of the materials on their adsorption properties. As adsorbents, multiwall carbon nanotubes (MWCNTs) without functionalization and with oxygen or nitrogen surface groups, as well as carbon nanotubes doped with nitrogen were used. The adsorption was studied in aqueous phase using batch adsorption experiments, results being fitted to both Langmuir and Freundlich models. The adsorption capacity is strongly dependent on both the hydrophobicity of the adsorbates and the morphology of the adsorbents. Thermodynamic parameters were determined observing strong interactions between the aromatic rings of the emerging pollutant and the nitrogen modified adsorbents.
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Affiliation(s)
- Yolanda Patiño
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Eva Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain.
| | - Esteban Gallegos-Suarez
- Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie No. 2, Cantoblanco, 28049 Madrid, Spain; Dpto. Química Inorgánica y Técnica, Fac. de Ciencias, UNED, C/ Senda del Rey n° 9, 28040 Madrid, Spain
| | - Antonio Guerrero-Ruiz
- Dpto. Química Inorgánica y Técnica, Fac. de Ciencias, UNED, C/ Senda del Rey n° 9, 28040 Madrid, Spain
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Krivtsov I, Ilkaeva M, Avdin V, Amghouz Z, Khainakov SA, García JR, Díaz E, Ordóñez S. Exceptional thermal stability of undoped anatase TiO2 photocatalysts prepared by a solvent-exchange method. RSC Adv 2015. [DOI: 10.1039/c5ra01114k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
A new solvent-exchange method for preparation of undoped anatase TiO2 nanoparticles with unprecedented thermal stability has been presented.
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Affiliation(s)
- Igor Krivtsov
- Department of Organic and Inorganic Chemistry
- University of Oviedo-CINN
- 33006 Oviedo
- Spain
- Nanotechnology Education and Research Center
| | - Marina Ilkaeva
- Department of Organic and Inorganic Chemistry
- University of Oviedo-CINN
- 33006 Oviedo
- Spain
- Department of Chemistry
| | - Viacheslav Avdin
- Nanotechnology Education and Research Center
- South Ural State University
- Chelyabinsk
- Russia
- Department of Chemistry
| | - Zakariae Amghouz
- Servicios Científico-Técnicos
- Universidad de Oviedo
- 33006 Oviedo
- Spain
| | | | - José R. García
- Department of Organic and Inorganic Chemistry
- University of Oviedo-CINN
- 33006 Oviedo
- Spain
| | - Eva Díaz
- Department of Chemical and Environmental Engineering
- University of Oviedo
- 33006 Oviedo
- Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering
- University of Oviedo
- 33006 Oviedo
- Spain
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Patiño Y, Díaz E, Ordóñez S. Performance of different carbonaceous materials for emerging pollutants adsorption. Chemosphere 2015; 119 Suppl:S124-S130. [PMID: 24907714 DOI: 10.1016/j.chemosphere.2014.05.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 05/08/2014] [Accepted: 05/09/2014] [Indexed: 06/03/2023]
Abstract
The adsorption of three representative emerging pollutants over different kinds of carbonaceous adsorbents has been studied in this work. The adsorbates were nalidixic acid (NAL, representative of a pharmaceutical), 1,8-dichlorooctane (DCO, a chloroparaffin) and methyl-phenoxy-ethanol (MPET, a surfactant). Activated carbons, carbon nanofibers, carbon nanotubes and high surface area graphites have been tested as adsorbents. Adsorption isotherms, carried out in a batch system, were fitted using both a Langmuir and a Freundlich model. It was shown that the capacity of adsorption follows the order DCO≫NAL>MPET for all the adsorbents, and among the adsorbents, the external morphology (surface area and mesoporous volume) is the key parameter. The results from thermodynamic analysis show, however, that both morphological and chemical properties of both adsorbates and adsorbents influenced their behavior.
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Affiliation(s)
- Yolanda Patiño
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Eva Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain
| | - Salvador Ordóñez
- Department of Chemical and Environmental Engineering, University of Oviedo, Faculty of Chemistry, Julián Clavería s/n, 33006 Oviedo, Spain.
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Faba L, Díaz E, Ordóñez S. Role of the support on the performance and stability of Pt-based catalysts for furfural–acetone adduct hydrodeoxygenation. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01360c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The roles of metal dispersion and support properties of Pt catalysts on their performance for HDO of condensation adducts have been determined.
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Affiliation(s)
- L. Faba
- Department of Chemical and Environmental Engineering
- Faculty of Chemistry
- University of Oviedo
- 33006 Oviedo
- Spain
| | - E. Díaz
- Department of Chemical and Environmental Engineering
- Faculty of Chemistry
- University of Oviedo
- 33006 Oviedo
- Spain
| | - S. Ordóñez
- Department of Chemical and Environmental Engineering
- Faculty of Chemistry
- University of Oviedo
- 33006 Oviedo
- Spain
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Faba L, Díaz E, Ordóñez S. One-pot aldol condensation and hydrodeoxygenation of biomass-derived carbonyl compounds for biodiesel synthesis. ChemSusChem 2014; 7:2816-20. [PMID: 25088473 DOI: 10.1002/cssc.201402236] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Indexed: 05/27/2023]
Abstract
Integrating reaction steps is of key interest in the development of processes for transforming lignocellulosic materials into drop-in fuels. We propose a procedure for performing the aldol condensation (reaction between furfural and acetone is taken as model reaction) and the total hydrodeoxygenation of the resulting condensation adducts in one step, yielding n-alkanes. Different combinations of catalysts (bifunctional catalysts or mechanical mixtures), reaction conditions, and solvents (aqueous and organic) have been tested for performing these reactions in an isothermal batch reactor. The results suggest that the use of bifunctional catalysts and aqueous phase lead to an effective integration of both reactions. Therefore, selectivities to n-alkanes higher than 50% were obtained using this catalyst at typical hydrogenation conditions (T=493 K, P=4.5 MPa, 24 h reaction time). The use of organic solvent, carbonaceous supports, or mechanical mixtures of monofunctional catalysts leads to poorer results owing to side effects; mainly, hydrogenation of reactants and adsorption processes.
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Affiliation(s)
- Laura Faba
- Department of Chemical and Environmental Engineering, University of Oviedo, C/Julián Clavería, s/n-33006-Oviedo-Asturias (Spain), Fax: (+34) 985103434
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Faba L, Díaz E, Ordóñez S. Improvement on the catalytic performance of Mg-Zr mixed oxides for furfural-acetone aldol condensation by supporting on mesoporous carbons. ChemSusChem 2013; 6:463-473. [PMID: 23362138 DOI: 10.1002/cssc.201200710] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 11/29/2012] [Indexed: 06/01/2023]
Abstract
A new procedure for improving the performance of the most common catalysts used in aqueous-phase aldol condensation (Mg-Zr mixed oxides) reactions is presented. This reaction is of interest for upgrading carbohydrate feedstocks. The procedure involves supporting Mg-Zr oxides on non-microporous carbonaceous materials, such as carbon nanofibers (CNFs) or high-surface-area graphites (HSAGs), using either incipient wetness or coprecipitation procedures. The use of HSAGs together with the coprecipitation method provides the best performance. Results obtained for the cross-condensation of acetone and furfural at 323 K reveal that the catalyst performance is greatly improved compared to the bulk oxides (96.5 % conversion vs. 81.4 % with the bulk oxide; 87.8 % selectivity for C13 and C8 adducts vs. 76.2 % with the bulk oxide). This difference is even more prominent in terms of rates per catalytically active basic site (four and seven times greater for C8 and C13 adducts, respectively). The improved performance is explained in terms of a more appropriate basic site distribution and by greater interaction of the reactants with the carbon surface. In addition, deactivation behavior of the catalyst is improved by tuning the morphology of the carbonaceous support. An important enhancement of the catalytic stability can be obtained selecting a HSAG with an appropriate pore diameter. With HSAG100 the activity decreased by less than 20 % between successive reaction cycles and the selectivity for the condensation products remained almost unaltered. The decrease is greater than 80 % for the bulk oxides tested at these conditions, with important increases in the selectivity for by-product formation.
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Affiliation(s)
- Laura Faba
- Department of Chemical and Environmental Engineering, University of Oviedo, C/Julián Clavería, s/n - 33006 Oviedo Asturias, Spain
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Pascual E, Martínez A, Ordóñez S. Gout: The mechanism of urate crystal nucleation and growth. A hypothesis based in facts. Joint Bone Spine 2013; 80:1-4. [DOI: 10.1016/j.jbspin.2012.08.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 08/23/2012] [Indexed: 10/27/2022]
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Gutiérrez I, Díaz E, Vega A, Ordóñez S. Consequences of cavity size and chemical environment on the adsorption properties of isoreticular metal-organic frameworks: An inverse gas chromatography study. J Chromatogr A 2013; 1274:173-80. [DOI: 10.1016/j.chroma.2012.12.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 12/03/2012] [Accepted: 12/04/2012] [Indexed: 10/27/2022]
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Kusema BT, Faba L, Kumar N, Mäki-Arvela P, Díaz E, Ordóñez S, Salmi T, Murzin DY. Hydrolytic hydrogenation of hemicellulose over metal modified mesoporous catalyst. Catal Today 2012. [DOI: 10.1016/j.cattod.2012.02.031] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Fort R, Bernabeu A, García del Cura MA, López de Azcona MC, Ordóñez S, Mingarro F. La Piedra de Novelda: una roca muy utilizada en el patrimonio arquitectónico. ACTA ACUST UNITED AC 2010. [DOI: 10.3989/mc.2002.v52.i266.332] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Ordóñez S, Díaz E, Bueres RF, Asedegbega-Nieto E, Sastre H. Carbon nanofibre-supported palladium catalysts as model hydrodechlorination catalysts. J Catal 2010. [DOI: 10.1016/j.jcat.2010.03.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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León M, Díaz E, Bennici S, Vega A, Ordóñez S, Auroux A. Adsorption of CO2 on Hydrotalcite-Derived Mixed Oxides: Sorption Mechanisms and Consequences for Adsorption Irreversibility. Ind Eng Chem Res 2010. [DOI: 10.1021/ie902072a] [Citation(s) in RCA: 158] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marta León
- Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain, and Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256, CNRS-Université Claude Bernard (UCB) Lyon 1, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
| | - Eva Díaz
- Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain, and Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256, CNRS-Université Claude Bernard (UCB) Lyon 1, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
| | - Simona Bennici
- Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain, and Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256, CNRS-Université Claude Bernard (UCB) Lyon 1, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
| | - Aurelio Vega
- Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain, and Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256, CNRS-Université Claude Bernard (UCB) Lyon 1, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
| | - Salvador Ordóñez
- Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain, and Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256, CNRS-Université Claude Bernard (UCB) Lyon 1, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
| | - Aline Auroux
- Department of Chemical Engineering and Environmental Technology, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain, and Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256, CNRS-Université Claude Bernard (UCB) Lyon 1, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
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Bueres RF, Asedegbega-Nieto E, Díaz E, Ordóñez S, Díez FV. Performance of carbon nanofibres, high surface area graphites, and activated carbons as supports of Pd-based hydrodechlorination catalysts. Catal Today 2010. [DOI: 10.1016/j.cattod.2009.05.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Marín P, Ho W, Ordóñez S, Díez FV. Demonstration of a control system for combustion of lean hydrocarbon emissions in a reverse flow reactor. Chem Eng Sci 2010. [DOI: 10.1016/j.ces.2009.02.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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