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Yuan H, Zheng H, Ren Y, Xiao D, Ran L, Guo Y, Mao L, Tang J. Highly Active Catalytic CO 2 Hydrogenation to Lower Olefins via Spinel ZnGaO x Combined with SAPO-34. Chem Asian J 2023; 18:e202201174. [PMID: 36520043 DOI: 10.1002/asia.202201174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
A key primary method for creating a carbon cycle and carbon neutrality is the catalytic hydrogenation of CO2 into high value-added chemicals or fuels. In this work, ZnGaOx oxides were prepared by parallel co-precipitation and physically mixed with SAPO-34 molecular sieves prepared by hydrothermal synthesis to produce ZnGaOx /SAPO-34 bifunctional catalysts, which were evaluated for the catalytic synthesis of lower olefins (C2 = -C4 = ) from carbon dioxide hydrogenation. It was demonstrated that the reaction process requires oxygen defect activation, synergistic hydrogenation, and CO2 alkaline adsorption of ZnGaOx . The spinel structure of ZnGaOx has more abundant oxygen defects and alkaline adsorption sites than the ZnGaOx solid solution, which effectively enhances the catalytic performance. The CO2 conversion was 28.52%, the selectivity of C2 = -C4 = in hydrocarbons reached 70.01%, and the single-pass yield of C2 = -C4 = was 10.95% at 370 °C, 3.0 MPa, and 4800 mL/gcat /h.
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Affiliation(s)
- Hao Yuan
- Molecular Synthesis & Engineering of Products, College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Heping Zheng
- Sichuan Coal Industry Group Co., Ltd., Chengdu, 610091, P. R. China
| | - Yu Ren
- Sichuan Coal Industry Group Co., Ltd., Chengdu, 610091, P. R. China
| | - Daqiang Xiao
- Sichuan Coal Industry Group Co., Ltd., Chengdu, 610091, P. R. China
| | - Longteng Ran
- Panzhihua Coal United Coking Co., Ltd., Panzhihua, 617000, P. R. China
| | - Yujing Guo
- Molecular Synthesis & Engineering of Products, College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Luyao Mao
- Molecular Synthesis & Engineering of Products, College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Jianhua Tang
- Molecular Synthesis & Engineering of Products, College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
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