Advances in synthesis technologies of low-carbon olefins based C1 chemistry
REN Jian1,2, LI Da-peng1,2, WANG Ning-bo1,2, WANG Yong-juan1,2, YAO Xiao-hong1,2, WANG Wei1,2, YANG Fan1,2, DANG Yu1,2
1. Engineering Research Center for High-efficiency Utilization of Fossil Hydrocarbon Resource of Petroleum and Chemical Industry, Xi'an 710000, China; 2. Hydrocarbon High-efficiency Utilization Technology Research Center, Shaanxi Yanchang Petroleum(Group) Corp., Ltd., Xi'an 710000, China
Abstract: The research advances in the reaction mechanism for synthesizing low-carbon olefins via C1 chemistry is stated.As determined by the ASF distribution law,the low-carbon olefins produced from syngas via conventional FTO pathway exhibit deficiencies such as high selectivity of by-products CH4 and saturated alkanes,and in particular,the selectivity of targeting products C=2,C=3 and C=4 hardly exceeding 58%.However,FeMnK@SAMPO-34,a core-shell type bi-functional catalyst in term of MTO mechanism,can help the maximum conversion rate of CO,the maximum selectivity of total low-carbon hydrocarbons (C2-C4),the maximum selectivity of low-carbon light olefins (C=2-C=4),the minimum CH4 selectivity and the minimum CO2 selectivity to reach 92.4%,69.2%,46.6%,10.5% and 16.8%,respectively.In addition,the overall selectivity of low-carbon hydrocarbons (C2-C4) and the selectivity of low-carbon light olefins (C=2-C=4) can be up to 94% and 80%,respectively,and the CH4 selectivity can be reduced to 2% through the direct conversion of syngas (CO+H2) over OX-ZEO bi-functional catalyst based on the ketene intermediate mechanism,with the experimental conditions of temperature 400℃,pressure 2.5 MPa and H2/CO=2.0.Moreover,the high temperature pyrolysis,oxidative coupling and oxygen-free conversion of CH4 as well as hydrogenation of CO2 provide alternative pathways for low-carbon olefins production.
任健, 李大鹏, 王宁波, 王永娟, 姚晓虹, 王维, 杨帆, 党昱. 基于C1化学的低碳烯烃合成技术研究进展[J]. 现代化工, 2018, 38(8): 58-62.
REN Jian, LI Da-peng, WANG Ning-bo, WANG Yong-juan, YAO Xiao-hong, WANG Wei, YANG Fan, DANG Yu. Advances in synthesis technologies of low-carbon olefins based C1 chemistry. Modern Chemical Industry, 2018, 38(8): 58-62.
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