Main content area

Direct conversion of simulated propene-rich bio-syngas to liquid iso-hydrocarbons via FT-oligomerization integrated catalytic process

Zhang, Qian, Wang, Tiejun, Weng, Yujing, Zhang, Huiyan, Vitidsant, Tharapong, Li, Yuping, Zhang, Qi, Xiao, Rui, Wang, Chenguang, Ma, Longlong
Energy conversion and management 2018 v.171 pp. 211-221
active sites, biofuels, carbon monoxide, catalysts, catalytic activity, catalytic cracking, gasoline, hydrocarbons, hydrogen, hydrogenation, isomerization, liquids, oligomerization, polymerization, zeolites
The bio-syngas formed from the catalytic cracking of bio-oil include two types of useful components which are light olefin and H2, CO. The integration of FTS and olefinic polymerization seems potential way for the production of hydrocarbon bio-fuels while fully utilizing the olefin-rich bio-syngas. This work aimed to develop an integrated process for the production of liquid hydrocarbons directly from the olefin-rich bio-syngas through a one-stage process, which included the synthesis of liquid hydrocarbons via the oligomerization of light olefin over HZSM-5 along with the FT (Fischer-Tropsch) synthesis of H2, CO over FeMn catalyst. A series of integration configuration composed of Fe-based catalyst (FeMn) and acidic zeolite (HZSM-5) were investigated, it was found that the undesired hydrogenation of lower olefin on the nearby metal active site seems greatly affected the yield of C5+ . More significantly, the proximity of the two active components plays a crucial role in suppressing the undesired hydrogenation reaction and contributing to the high selectivity of liquid hydrocarbons. The optimal catalytic performance yields a high selectivity to gasoline-range hydrocarbons (87.3%) with excellent low olefin hydrogenation selectivity (7.4%). Meanwhile, the obtained gasoline-range hydrocarbon showed high degree of isomerization. The integrated transformation process potentially provides an alternative way for the production of gasoline range isomerized hydrocarbon fuels using olefin-rich bio-syngas.