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Santiago RG, Coelho JA, de Lucena SMP, Musse APS, Portilho MDF, Rodriguez-Castellón E, de Azevedo DCS, Bastos-Neto M. Synthesis of MeOH and DME From CO2 Hydrogenation Over Commercial and Modified Catalysts. Front Chem 2022; 10:903053. [PMID: 35720988 PMCID: PMC9203738 DOI: 10.3389/fchem.2022.903053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 04/28/2022] [Indexed: 11/13/2022] Open
Abstract
Growing concern about climate change has been driving the search for solutions to mitigate greenhouse gas emissions. In this context, carbon capture and utilization (CCU) technologies have been proposed and developed as a way of giving CO2 a sustainable and economically viable destination. An interesting approach is the conversion of CO2 into valuable chemicals, such as methanol (MeOH) and dimethyl ether (DME), by means of catalytic hydrogenation on Cu-, Zn-, and Al-based catalysts. In this work, three catalysts were tested for the synthesis of MeOH and DME from CO2 using a single fixed-bed reactor. The first one was a commercial CuO/γ-Al2O3; the second one was CuO-ZnO/γ-Al2O3, obtained via incipient wetness impregnation of the first catalyst with an aqueous solution of zinc acetate; and the third one was a CZA catalyst obtained by the coprecipitation method. The samples were characterized by XRD, XRF, and N2 adsorption isotherms. The hydrogenation of CO2 was performed at 25 bar, 230°C, with a H2:CO2 ratio of 3 and space velocity of 1,200 ml (g cat · h)−1 in order to assess the potential of these catalysts in the conversion of CO2 to methanol and dimethyl ether. The catalyst activity was correlated to the adsorption isotherms of each reactant. The main results show that the highest CO2 conversion and the best yield of methanol are obtained with the CZACP catalyst, very likely due to its higher adsorption capacity of H2. In addition, although the presence of zinc oxide reduces the textural properties of the porous catalyst, CZAWI showed higher CO2 conversion than commercial catalyst CuO/γ-Al2O3.
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Affiliation(s)
- Rafaelle G. Santiago
- Grupo de Pesquisa em Separações por Adsorção (GPSA), Department of Chemical Engineering, Federal University of Ceará, Fortaleza, Brazil
| | - Juliana A. Coelho
- Grupo de Pesquisa em Separações por Adsorção (GPSA), Department of Chemical Engineering, Federal University of Ceará, Fortaleza, Brazil
| | - Sebastião M. P. de Lucena
- Grupo de Pesquisa em Separações por Adsorção (GPSA), Department of Chemical Engineering, Federal University of Ceará, Fortaleza, Brazil
| | | | | | | | - Diana C. S. de Azevedo
- Grupo de Pesquisa em Separações por Adsorção (GPSA), Department of Chemical Engineering, Federal University of Ceará, Fortaleza, Brazil
| | - Moises Bastos-Neto
- Grupo de Pesquisa em Separações por Adsorção (GPSA), Department of Chemical Engineering, Federal University of Ceará, Fortaleza, Brazil
- *Correspondence: Moises Bastos-Neto,
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Abstract
Wet air oxidation (WAO) is an attractive technique for sewage sludge treatment. The
WAO process and the factors influencing the process are examined in detail, together with the advantages
and disadvantages. Catalytic wet air oxidation (CWAO) is emphasized because it can lower
operational conditions, and the commonly-used and new homogeneous and heterogeneous catalysts
are introduced. Homogeneous catalysts tend to be more appropriate for the CWAO treatment
of sewage sludge, and Cu-based homogeneous catalysts such as CuSO4 are the most popular for industrial
applications. Heterogeneous catalysts include non-noble metal catalysts, noble metal catalysts,
metal-organic frameworks (MOFs) catalysts, and non-metal catalysts. Non-noble metal catalysts
typically contain hetero-elements as in Mo-based, Ce-based, Cu-based, Fe-based catalysts,
multi-metal supported catalysts, and polyoxometalates catalysts. In general, Mo-based catalysts
and Ce-based catalysts have higher activities than other metal-based catalysts. The commonly-used
noble metal elements are based on Ru, Pt, Pd, Rh, and Ir. The MOF catalysts tend to have high catalytic
activity, and the non-metallic carbon catalysts may be used in environments that would otherwise
be toxic to traditional metal catalysts. To conclude, a summary of the challenges and
prospects of WAO technology in sewage sludge treatment is given.
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Affiliation(s)
- De-bin Li
- College of Energy, Xiamen University, Xiamen 361102, China
| | - Duo Wang
- College of Energy, Xiamen University, Xiamen 361102, China
| | - Zi-sheng Jiang
- Power China ECO-Environmental Group Co., LTD., Shenzhen 518102, China
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Venu B, Shirisha V, Vishali B, Naresh G, Kishore R, Sreedhar I, Venugopal A. A Cu-BTC metal–organic framework (MOF) as an efficient heterogeneous catalyst for the aerobic oxidative synthesis of imines from primary amines under solvent free conditions. NEW J CHEM 2020. [DOI: 10.1039/c9nj05997k] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Cu-BTC MOF catalyst has been identified as an efficient and reusable heterogeneous catalyst for imine formation under neat conditions.
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Affiliation(s)
- Boosa Venu
- Catalysis and Fine Chemicals Division
- CSIR – Indian Institute of Chemical Technology
- Tarnaka
- Hyderabad – 500 007
- India
| | - Varimalla Shirisha
- Catalysis and Fine Chemicals Division
- CSIR – Indian Institute of Chemical Technology
- Tarnaka
- Hyderabad – 500 007
- India
| | - Bilakanti Vishali
- Catalysis and Fine Chemicals Division
- CSIR – Indian Institute of Chemical Technology
- Tarnaka
- Hyderabad – 500 007
- India
| | - Gutta Naresh
- Catalysis and Fine Chemicals Division
- CSIR – Indian Institute of Chemical Technology
- Tarnaka
- Hyderabad – 500 007
- India
| | - Ramineni Kishore
- Catalysis and Fine Chemicals Division
- CSIR – Indian Institute of Chemical Technology
- Tarnaka
- Hyderabad – 500 007
- India
| | - Inkollu Sreedhar
- Department of Chemical Engineering
- BITS Pilani Hyderabad Campus
- Hyderabad 500 078
- India
| | - Akula Venugopal
- Catalysis and Fine Chemicals Division
- CSIR – Indian Institute of Chemical Technology
- Tarnaka
- Hyderabad – 500 007
- India
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Balci S. Structural Property Improvements of Bentonite with Sulfuric Acid Activation and a Test in Catalytic Wet Peroxide Oxidation of Phenol. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2019. [DOI: 10.1515/ijcre-2018-0167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The acid activation of bentonite from Middle Anatolia, consisting of mostly montmorillonite, with a hot solution of H2SO4 with different concentrations was carried out. SEM images, nitrogen sorption isotherms and FTIR spectra were used to examine structural changes of the bentonite with acid activation. Acid–base titration method was applied to determine surface acidities. SEM images, nitrogen sorption isotherms indicated that the acid activation caused considerable increases both in the surface area and pore volumes by changing the morphology and aluminum content. FTIR spectra showed the enhancement both in Lewis and Brønsted acidities, significant increases in H–bonding to the structure with acid concentration. Acid treatment gave good structural properties with high surface acidity. Stable structured acid activated bentonite with 2 M was tested in catalytic wet peroxide oxidation (CWPO) of phenol together with raw bentonite. Around 96 % phenol removal was achieved in 135 minutes at reaction temperature of 50 °C while the raw bentonite did not show good results. The data were in agreement with the first order dependency with respect to phenol.
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Kamali M, Persson KM, Costa ME, Capela I. Sustainability criteria for assessing nanotechnology applicability in industrial wastewater treatment: Current status and future outlook. ENVIRONMENT INTERNATIONAL 2019; 125:261-276. [PMID: 30731376 DOI: 10.1016/j.envint.2019.01.055] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/19/2019] [Accepted: 01/19/2019] [Indexed: 06/09/2023]
Abstract
Application of engineered nanomaterials for the treatment of industrial effluents and to deal with recalcitrant pollutants has been noticeably promoted in recent years. Laboratory, pilot and full-scale studies emphasize the potential of this technology to offer promising treatment options to meet the future needs for clean water resources and to comply with stringent environmental regulations. The technology is now in the stage of being transferred to the real applications. Therefore, the assessment of its performance according to sustainability criteria and their incorporation into the decision-making process is a key task to ensure that long term benefits are achieved from the nano-treatment technologies. In this study, the importance of sustainability criteria for the conventional and novel technologies for the treatment of industrial effluents was determined in a general approach assisted by a fuzzy-Delphi method. The criteria were categorized in technical, economic, environmental and social branches and the current situation of the nanotechnology regarding the criteria was critically discussed. The results indicate that the efficiency and safety are the most important parameters to make sustainable choices for the treatment of industrial effluents. Also, in addition to the need for scaling-up the nanotechnology in various stages, the study on their environmental footprint must continue in deeper scales under expected environmental conditions, in particular the synthesis of engineered nanomaterials and the development of reactors with the ability of recovery and reuse the nanomaterials. This paper will aid to select the most sustainable types of nanomaterials for the real applications and to guide the future studies in this field.
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Affiliation(s)
- Mohammadreza Kamali
- Department of Environment and Planning, Center for Environmental and Marine Studies, CESAM, University of Aveiro, 3810-193 Aveiro, Portugal; Department of Materials and Ceramics Engineering, Aveiro Institute of Materials, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Kenneth M Persson
- Department of Building and Environmental Technology/Water Resources Engineering, Lund University, PO Box 118, SE-221 00 Lund, Sweden
| | - Maria Elisabete Costa
- Department of Materials and Ceramics Engineering, Aveiro Institute of Materials, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Isabel Capela
- Department of Environment and Planning, Center for Environmental and Marine Studies, CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
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Pinos-Vélez V, Medina F, Dafinov A. PERFORMANCE OF THE CATALYTIC MEMBRANE REACTORS OF DIFFERENT PORE SIZE WITH PALLADIUM AS CATALYTIC PHASE IN HYDROGENATION AND OXIDATION REACTIONS. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2018. [DOI: 10.1590/0104-6632.20180354s20170475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- V. Pinos-Vélez
- Rovira I Virgili University, Spain; Universidad de Cuenca, Ecuador; Universidad de Cuenca, Ecuador
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Do QC, Kim DG, Ko SO. Nonsacrificial Template Synthesis of Magnetic-Based Yolk-Shell Nanostructures for the Removal of Acetaminophen in Fenton-like Systems. ACS APPLIED MATERIALS & INTERFACES 2017; 9:28508-28518. [PMID: 28771304 DOI: 10.1021/acsami.7b07658] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Recently, yolk-shell structured materials with active metal cores have received considerable attention in heterogeneous Fenton-like systems, which have excellent catalytic performance. In this study, we initially attempted the nonsacrificial template synthesis of yolk-shell structured nanoparticles with magnetite cores encapsulated in a mesoporous silica shell (Fe3O4@SiO2) via a modified sol-gel process and then evaluated their catalytic activity for acetaminophen degradation in Fenton-like systems. Second, copper nanoparticles were decorated on the surface of the Fe3O4@SiO2 microspheres (Fe3O4@SiO2@Cu) to enhance the catalytic activity. The morphological, structural, and physicochemical properties of the prepared materials were characterized via X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, field emission transmission electron microscopy, nitrogen adsorption-desorption isotherms, specific surface area, ζ-potential, magnetic properties, and Fourier transform infrared spectroscopy. The results demonstrated a successful fabrication of the targeted materials. The yolk-shell structured materials possess a spherical morphology with an active core, protective shell, and hollow void. The Fe3O4@SiO2 and Fe3O4@SiO2@Cu variants showed acetaminophen removal rates significantly higher compared to those of their counterparts, i.e., the Fe3O4 and Fe3O4@Cu core-shell structures. Fe3O4@SiO2@Cu showed that the copper nanoparticles were firmly immobilized on the mesoporous silica shell, dramatically improving the catalytic performance. Both the yolk-shell structured Fe3O4@SiO2 and Fe3O4@SiO2@Cu exhibited good separation and satisfactory regeneration properties, which could be recycled six times without any obvious decline in catalytic activity. Overall, the results of this study suggested that Fe3O4@SiO2 and Fe3O4@SiO2@Cu yolk-shell nanostructures could be promising catalysts for a heterogeneous Fenton-like system by which the removal of emerging contaminants can be greatly improved.
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Affiliation(s)
- Quoc Cuong Do
- Department of Civil Engineering, Kyung Hee University , 1732 Deokyoung-daero, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Do-Gun Kim
- Department of Civil Engineering, Kyung Hee University , 1732 Deokyoung-daero, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Seok-Oh Ko
- Department of Civil Engineering, Kyung Hee University , 1732 Deokyoung-daero, Yongin-si, Gyeonggi-do 17104, Republic of Korea
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Kwak BS, Park NK, Baek JI, Ryu HJ, Kang M. Improvement of reduction and oxidation performance of MMgOx (M = Fe, Co, Ni, and Cu) particles for chemical looping combustion. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2017.02.049] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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