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A combination process of mineral carbonation with SO2 disposal for simulated flue gas by magnesia-added seawater. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-019-1871-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Gil A, Arrieta E, Vicente MÁ, Korili SA. Application of Industrial Wastes from Chemically Treated Aluminum Saline Slags as Adsorbents. ACS OMEGA 2018; 3:18275-18284. [PMID: 31458405 PMCID: PMC6643525 DOI: 10.1021/acsomega.8b02397] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 12/12/2018] [Indexed: 06/10/2023]
Abstract
In this study, industrial wastes, which remain after aluminum extraction from saline slags, were used as adsorbents. The aluminum saline slags were treated under reflux with 2 mol/dm3 aqueous solutions of NaOH, H2SO4, and HCl for 2 h. After separation by filtration, aqueous solutions containing the extracted aluminum and residual wastes were obtained. The wastes were characterized by nitrogen adsorption at -196 °C, X-ray diffraction, scanning electron microscopy, and ammonia pulse chemisorption. The chemical treatment reduced the specific surface area, from 84 to 23 m2/g, and the pore volume, from 0.136 to 0.052 cm3/g, of the saline slag and increased the ammonia-adsorption capacity from 2.84 to 5.22 cm3/g, in the case of acid-treated solids. The materials were applied for the removal of Acid Orange 7 and Acid Blue 80 from aqueous solutions, considering both single and binary systems. The results showed interesting differences in the adsorption capacity between the samples. The saline slag treated with HCl rapidly adsorbed all of the dyes present in solution, whereas the other materials retained between 50 and 70% of the molecules present in solution. The amount of Acid Orange 7 removed by the nontreated material and by the material treated with NaOH increased in the presence of Acid Blue 80, which can be considered as a synergistic behavior. The CO2 adsorption of the solids at several temperatures up to 200 °C was also evaluated under dry conditions. The aluminum saline slag presented an adsorption capacity higher than the rest of treated samples, a behavior that can be explained by the specific sites of adsorption and the textural properties of the solids. The isosteric heats of CO2 adsorption, determined from the Clausius-Clapeyron equation, varied between 1.7 and 26.8 kJ/mol. The wastes should be used as adsorbents for the selective removal of organic contaminants in wastewater treatment.
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Affiliation(s)
- Antonio Gil
- INAMAT-Departamento
de Ciencias, Edificio de los Acebos, Universidad
Pública de Navarra, Campus de Arrosadía, E-31006 Pamplona, Spain
| | - Ekhine Arrieta
- INAMAT-Departamento
de Ciencias, Edificio de los Acebos, Universidad
Pública de Navarra, Campus de Arrosadía, E-31006 Pamplona, Spain
| | - Miguel Ángel Vicente
- GIR-QUESCAT,
Departamento de Química Inorgánica, Universidad de Salamanca, E-37008 Salamanca, Spain
| | - Sophia A. Korili
- INAMAT-Departamento
de Ciencias, Edificio de los Acebos, Universidad
Pública de Navarra, Campus de Arrosadía, E-31006 Pamplona, Spain
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He D, Shao Y, Qin C, Pu G, Ran J, Zhang L. Understanding the Sulfation Pattern of CaO-Based Sorbents in a Novel Process for Sequential CO2 and SO2 Capture. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b02827] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Donglin He
- Key Laboratory
of Low-Grade
Energy Utilization Technologies and Systems of Ministry of Education,
College of Power Engineering, Chongqing University, Chongqing 400044, China
| | - Yan Shao
- Key Laboratory
of Low-Grade
Energy Utilization Technologies and Systems of Ministry of Education,
College of Power Engineering, Chongqing University, Chongqing 400044, China
| | - Changlei Qin
- Key Laboratory
of Low-Grade
Energy Utilization Technologies and Systems of Ministry of Education,
College of Power Engineering, Chongqing University, Chongqing 400044, China
| | - Ge Pu
- Key Laboratory
of Low-Grade
Energy Utilization Technologies and Systems of Ministry of Education,
College of Power Engineering, Chongqing University, Chongqing 400044, China
| | - Jingyu Ran
- Key Laboratory
of Low-Grade
Energy Utilization Technologies and Systems of Ministry of Education,
College of Power Engineering, Chongqing University, Chongqing 400044, China
| | - Li Zhang
- Key Laboratory
of Low-Grade
Energy Utilization Technologies and Systems of Ministry of Education,
College of Power Engineering, Chongqing University, Chongqing 400044, China
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Pinheiro CIC, Fernandes A, Freitas C, Santos ET, Ribeiro MF. Waste Marble Powders as Promising Inexpensive Natural CaO-Based Sorbents for Post-Combustion CO2 Capture. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04574] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carla I. C. Pinheiro
- CQE-Centro de Química
Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049−001 Lisboa, Portugal
| | - Auguste Fernandes
- CQE-Centro de Química
Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049−001 Lisboa, Portugal
| | - Cátia Freitas
- CQE-Centro de Química
Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049−001 Lisboa, Portugal
| | - Edgar T. Santos
- CQE-Centro de Química
Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049−001 Lisboa, Portugal
| | - Maria F. Ribeiro
- CQE-Centro de Química
Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049−001 Lisboa, Portugal
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Ma A, Jia Q, Su H, Zhi Y, Tian N, Wu J, Shan S. Study of CO2 cyclic absorption stability of CaO-based sorbents derived from lime mud purified by sucrose method. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:2530-2536. [PMID: 26423292 DOI: 10.1007/s11356-015-5477-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 09/21/2015] [Indexed: 06/05/2023]
Abstract
Using lime mud (LM) purified by sucrose method, derived from paper-making industry, as calcium precursor, and using mineral rejects-bauxite-tailings (BTs) from aluminum production as dopant, the CaO-based sorbents for high-temperature CO2 capture were prepared. Effects of BTs content, precalcining time, and temperature on CO2 cyclic absorption stability were illustrated. The cyclic carbonation behavior was investigated in a thermogravimetric analyzer (TGA). Phase composition and morphologies were analyzed by XRD and SEM. The results reflected that the as-synthesized CaO-based sorbent doped with 10 wt% BTs showed a superior CO2 cyclic absorption-desorption conversion during multiple cycles, with conversion being >38 % after 50 cycles. Occurrence of Ca12Al14O33 phase during precalcination was probably responsible for the excellent CO2 cyclic stability.
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Affiliation(s)
- AiHua Ma
- School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - QingMing Jia
- School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - HongYing Su
- School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - YunFei Zhi
- School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Na Tian
- School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Jing Wu
- School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - ShaoYun Shan
- School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
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Tailor R, Abboud M, Sayari A. Supported polytertiary amines: highly efficient and selective SO2 adsorbents. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:2025-2034. [PMID: 24437448 DOI: 10.1021/es404135j] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Tertiary amine containing poly(propyleneimine) second (G2) and third (G3) generation dendrimers as well as polyethyleneimine (PEI) were developed for the selective removal of SO2. N-Alkylation of primary and secondary amines into tertiary amines was confirmed by FTIR and NMR analysis. Such modified polyamines were impregnated on two nanoporous supports, namely, SBA-15PL silica with platelet morphology and ethanol-extracted pore-expanded MCM-41 (PME) composite. In the presence of 0.1% SO2/N2 at 23 °C, the uptake of modified PEI, G2, and G3 supported on SBA-15PL was 2.07, 2.35, and 1.71 mmol/g, respectively; corresponding to SO2/N ratios of 0.22, 0.4, and 0.3. Under the same conditions, the SO2 adsorption capacity of PME-supported modified PEI and G3 was significantly higher, reaching 4.68 and 4.34 mmol/g, corresponding to SO2/N ratios of 0.41 and 0.82, respectively. The working SO2 adsorption capacity decreased with increasing temperature, reflecting the exothermic nature of the process. The adsorption capacity of these materials was enhanced dramatically in the presence of humidity in the gas mixture. FTIR data before SO2 adsorption and after adsorption and regeneration did not indicate any change in the materials. Nonetheless, the SO2 working capacity decreased in consecutive adsorption/regeneration cycles due to evaporation of impregnated polyamines, rather than actual deactivation. FTIR and (13)C and (15)N CP-MAS NMR of fresh and SO2 adsorbed modified G3 on PME confirmed the formation of a complexation adduct.
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Affiliation(s)
- Ritesh Tailor
- Department of Chemistry, Centre for Catalysis Research and Innovation (CCRI), University of Ottawa , Ottawa, Ontario, Canada K1N 6N5
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