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Xiong Z, Zhu Y, Liu J, Du Y, Zhou F, Jin J, Yang Q, Lu W. The influence of H 2O or/and O 2 introduction during the low-temperature gas-phase sulfation of organic COS + CS 2 on the conversion and deposition of sulfur-containing species in the sulfated CeO 2-OS catalyst for NH 3-SCR. NANOSCALE 2024; 16:1223-1237. [PMID: 38115815 DOI: 10.1039/d3nr04686a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Herein, the typical components of blast furnace gas, including H2O and O2, were introduced to improve the NH3-SCR activity of the sulfated CeO2-OS catalyst during the gas-phase sulfation of organic COS + CS2 at 50 °C. The characterization results demonstrate that the introduction of O2 or H2O during gas-phase sulfation enhances the conversion of organic COS + CS2 on a cubic fluorite CeO2 surface and reduces the formation of sulfur and sulfates in the catalyst, but decreases the BET surface area and pore volume of the sulfated CeO2-OS catalyst. However, the introduction of O2 or H2O during the gas-phase sulfation increases the molar ratios of Ce3+/(Ce3+ + Ce4+) and Oβ/(Oα + Oβ + Oγ) on the sulfated CeO2-OS catalyst surface, thus promoting the formation of surface oxygen vacancies and chemisorbed oxygen, and these properties of the catalyst are further enhanced by the co-existence of O2 and H2O. Furthermore, the reduction of sulfates formed under the action of O2 or H2O decreases the weak acid sites of the sulfated CeO2-OS catalyst, but the few and highly dispersive sulfates present stronger reducibility, and the proportion of medium-strong acid sites of the catalyst increases. These factors help to improve the NH3-SCR activity of the sulfated CeO2-OS catalyst. Thus, there exists a synergistic effect of H2O and O2 introduction during gas-phase sulfation on the physical-chemical properties and catalytic performance of the sulfated CeO2-OS catalyst by organic COS + CS2 at 50 °C.
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Affiliation(s)
- Zhibo Xiong
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, 200093, China.
| | - Yafei Zhu
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, 200093, China.
| | - Jiaxing Liu
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, 200093, China.
| | - Yanping Du
- School of Engineering, Lancaster University, Lancaster, LA1 4YW, UK
| | - Fei Zhou
- Jiangsu Guoxin Jingjiang Power Co. Ltd., Jingjiang 214500, Jiangsu, China
| | - Jing Jin
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, 200093, China.
| | - Qiguo Yang
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, 200093, China.
| | - Wei Lu
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, 200093, China.
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Yu J, Lu Y, Wang S, Xu M, Jin Q, Zhu C, Chen J, Xu H. Catalytic hydrolysis of carbonyl sulfide in blast furnace gas over Sm-Ce-O x@ZrO 2 catalyst. RSC Adv 2024; 14:3135-3145. [PMID: 38249668 PMCID: PMC10797331 DOI: 10.1039/d3ra06833a] [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: 10/14/2023] [Accepted: 01/09/2024] [Indexed: 01/23/2024] Open
Abstract
Carbonyl sulfur (COS) is a prominent organic sulfur pollutant commonly found in the by-product gas generated by the steel industry. A series of Sm-doped CeOx@ZrO2 catalysts were prepared for the hydrolysis catalytic removal of COS. The results showed that the addition of Sm resulted in the most significant enhancement of hydrolysis catalytic activity. The 3% Sm2O3-Ce-Ox@ZrO2 catalyst exhibited the highest activity, achieving a hydrolysis catalytic efficiency of 100% and H2S selectivity of 100% within the temperature range of 90-180 °C. The inclusion of Sm had the effect of reducing the acidity of the catalyst while increasing weak basic sites, which facilitated the adsorption and activation of COS molecules at low temperatures. Appropriate doping of Sm proved beneficial in converting active surface chemisorbed oxygen into lattice oxygen, thereby decreasing the oxidation of intermediate products and maintaining the stability of the hydrolysis reaction.
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Affiliation(s)
- Jintao Yu
- School of Environmental Science and Engineering, Nanjing Tech University Nanjing 210009 PR China
- Shanghai Institute of Chemical Industry Environmental Engineering Co. Ltd Shanghai 200333 PR China
| | - Yao Lu
- School of Environmental Science and Engineering, Nanjing Tech University Nanjing 210009 PR China
- Shanghai Institute of Chemical Industry Environmental Engineering Co. Ltd Shanghai 200333 PR China
| | - Sheng Wang
- State Key Laboratory for Clean and Efficient Coal-fired Power Generation and Pollution Control, State Key Laboratory of Low-carbon Smart Coal-fired Power Generation and Ultra-clean Emission Nanjing 210046 China
| | - Mutao Xu
- School of Environmental Science and Engineering, Nanjing Tech University Nanjing 210009 PR China
- Nanjing Gekof Institute of Environmental Protection Technology & Equipment Co. Ltd Nanjing 210031 PR China
| | - Qijie Jin
- School of Environmental Science and Engineering, Nanjing Tech University Nanjing 210009 PR China
- Nanjing Gekof Institute of Environmental Protection Technology & Equipment Co. Ltd Nanjing 210031 PR China
| | - Chengzhang Zhu
- School of Environmental Science and Engineering, Nanjing Tech University Nanjing 210009 PR China
| | - Jisai Chen
- CCSC Nanjing Luzhou Environment Protection Co. Nanjing 211100 PR China
| | - Haitao Xu
- School of Environmental Science and Engineering, Nanjing Tech University Nanjing 210009 PR China
- Nanjing Gekof Institute of Environmental Protection Technology & Equipment Co. Ltd Nanjing 210031 PR China
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Wang Y, Ding L, Long H, Xiao J, Qian L, Wang H, Xu CC. Carbonyl sulfur removal from blast furnace gas: Recent progress, application status and future development. CHEMOSPHERE 2022; 307:136090. [PMID: 35995182 DOI: 10.1016/j.chemosphere.2022.136090] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/03/2022] [Accepted: 08/15/2022] [Indexed: 06/15/2023]
Abstract
Carbonyl sulfide (COS), a poisonous and harmful gas, is found in industrial gas products from various coal-firing processes. The emission of COS into the atmosphere contributes to aerosol particles that affect the global climate, posing a risk to climate change and population health. In recent years, the total amount of anthropogenic COS emissions has increased significantly, resulting in the prominent COS pollution problem and becoming a vital environmental issue. This review summarizes the research progress of removing COS from industrial gases. According to the characteristics of different industrial gas products, the COS removal mechanism and influence factors, as well as the advantages and disadvantages for various methods, are discussed, including oxidation, absorption/adsorption, hydrogenation, and hydrolysis. Although COS emission control technologies have attracted widespread attention, the progress of application in blast furnace gas purification has been extremely slow, insufficient and sporadic. To fill the gap, this work provides a timely review on blast furnace gas characteristics and application process of various methods for removing COS from blast furnace gas with varying compositions, and their challenges and future development. This work aims to provide guidance on how effective processes and techniques for removal of COS from blast furnace gas can be developed. This review emphasizes the desirability of direct COS removal from blast furnace gas compared to expensive terminal desulfurization technologies. Furthermore, the development of a new process for low-temperature COS removal from blast furnace gas based on a dual-functional catalyst of hydrolysis/adsorption is advocated.
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Affiliation(s)
- Yifan Wang
- School of Metallurgical Engineering, Anhui University of Technology, Maxiang Road, Ma'anshan, Anhui province, 243032, China; Department of Chemical/Biochemical Engineering, Western University, 1151 Richmond St, London, Ontario, N6A 5B9, Canada
| | - Long Ding
- School of Metallurgical Engineering, Anhui University of Technology, Maxiang Road, Ma'anshan, Anhui province, 243032, China
| | - Hongming Long
- School of Metallurgical Engineering, Anhui University of Technology, Maxiang Road, Ma'anshan, Anhui province, 243032, China; Key Laboratory of Metallurgical Emission Reduction & Resources Recycling (Anhui University of Technology), Ministry of Education, No. 59 Hudong Road, Ma'anshan, Anhui province, 243002, China
| | - Junjun Xiao
- School of Metallurgical Engineering, Anhui University of Technology, Maxiang Road, Ma'anshan, Anhui province, 243032, China
| | - Lixin Qian
- School of Metallurgical Engineering, Anhui University of Technology, Maxiang Road, Ma'anshan, Anhui province, 243032, China.
| | - Hongtao Wang
- School of Metallurgical Engineering, Anhui University of Technology, Maxiang Road, Ma'anshan, Anhui province, 243032, China
| | - Chunbao Charles Xu
- Department of Chemical/Biochemical Engineering, Western University, 1151 Richmond St, London, Ontario, N6A 5B9, Canada.
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Gu JN, Liang J, Hu S, Xue Y, Min X, Guo M, Hu X, Jia J, Sun T. Enhanced removal of COS from blast furnace gas via catalytic hydrolysis over Al2O3-based catalysts: Insight into the role of alkali metal hydroxide. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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