Synthesis of Lower Olefins Directly from Syngas over Indium-Based Oxide Bifunctional Catalysts
1. State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China;
2. China Petrochemical Corporation, Beijing 100728, China
Abstract：The synthesis of lower olefins directly from syngas is one of the most promising approaches for utilizing coal resources cleanly and efficiently. A series of In-based oxides containing different promoters were synthesis by co-precipitation method. The CO hydrogenation performance was studied over bifunctional catalysts composed of Indium-based oxides and SAPO-34 zeolites. The effects of different additives on the structure of Indium-based oxides were characterized by N2 adsorption-desorption technique, X-ray diffraction (XRD) and temperature-programmed reduction (H2-TPR). The results indicated that the structure stability of In-based composite oxides directly determined the reaction performance, and the stability of InZr oxide was the optimal, exhibiting a good CO hydrogenation catalytic performance. Finally, the effects of reaction temperature, pressure and space velocity on the reaction performance of the coupled-catalyst system were investigated. Under the better reaction conditions, the C2-C4 olefins selectivity of 70% (excluding CO2) was achieved.
Su Junjie1,Liu Su1,Wang Yangdong1 et al. Synthesis of Lower Olefins Directly from Syngas over Indium-Based Oxide Bifunctional Catalysts[J]. 化学反应工程与工艺, 2018, 34(1): 28-35.
