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Solar-assisted two-stage catalytic membrane reactor for coupling CO2 splitting with methane oxidation reaction

GREEN ENERGY & ENVIRONMENT 2024年第11期9卷 1771-1780页

作者： Tan, Jinkun Gu, Zhenbin Liu, Zhengkun Wang, Pei Meijboom, Reinout Zhang, Guangru Jin, Wanqin Nanjing Tech Univ Coll Chem Engn State Key Lab Mat Oriented Chem Engn 30 Puzhu Rd S Nanjing 211816 Peoples R China Nanjing Tech Univ Quzhou Quzhou Membrane Mat Innovat Inst Quzhou 324000 Peoples R China Hohai Univ Coll Energy & Elect Engn Nanjing 211106 Peoples R China Univ Johannesburg Dept Chem Sci POB 524 ZA-2600 Auckland Pk South Africa

A two-stage catalytic membrane reactor (CMR) that couples CO2 2 splitting with methane oxidation reactions was constructed based on an oxygen-permeable perovskite asymmetric membrane. The asymmetric membrane comprises a dense SrFe 0.9 Ta 0.1 O 3-d (SFT) separation layer and a porous Sr 0.9 (Fe 0.9 Ta 0.1 ) 0.9 Cu 0.1 O 3-d (SFTC) catalytic layer. In the first stage reactor, a CO2 2 splitting reaction (CDS: 2CO2 2- 2CO + O2) 2 ) occurs at the SFTC catalytic layer. Subsequently, the O2 2 product is selectively extracted through the SFT separation layer to the permeated side for the methane combustion reaction (MCR), which provides an extremely low oxygen partial pressure to enhance the oxygen extraction. In the second stage, a Sr 0.9 (Fe 0.9 Ta 0.1 ) 0.9 Ni 0.1 O 3-d (SFTN) catalyst is employed to reform the products derived from MCR. The two-stage CMR design results in a remarkable 35.4% CO2 2 conversion for CDS at 900 degrees C. The two-stage CMR was extended to a hollow fiber configuration combining with solar irradiation. The solar-assisted two-stage CMR can operate stably for over 50 h with a high hydrogen yield of 18.1 mL min-1 1 cm- 2 . These results provide a novel strategy for reducing CO2 2 emissions, suggesting potential avenues for the design of the high-performance CMRs and catalysts based on perovskite oxides in the future. (c) 2024 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： CO2 2 splitting Two-stage catalytic membrane reactor Perovskite oxide Asymmetric membrane Solar irradiation assisted CARBON-DIOXIDE THERMAL-DECOMPOSITION transport membrane CONVERSION REDUCTION WATER HYDROGEN GAS

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