低碳化学与化工2025，Vol.50Issue(5)：83-92,10.DOI:10.12434/j.issn.2097-2547.20240518
CO加氢耦合甲苯烷基化制喷气燃料段芳烃
Synthesis of aromatics of jet fuel by coupling of CO hydrogenation and toluene alkylation reaction
摘要
Abstract
Fischer-Tropsch synthesis(FTS)is a reaction that converts syngas into liquid fuels and high value-added chemicals.The product distribution of Fischer-Tropsch synthesis follows the Anderson-Schulz-Flory(ASF)distribution,so the regulation of product distribution is a challenge.Fe-based Fischer-Tropsch synthesis catalysts could selectively prepare olefins,which is one of the most commonly used catalysts in Fischer-Tropsch synthesis.ZSM-5 molecular sieve presents great performance of olefin oligomerization,alkylation and aromatization,and is therefore often used for product regulation at the downstream end of Fischer-Tropsch synthesis.The reaction products of syngas under the coupling of Fe-based catalyst and ZSM-5 bi-functional catalyst are mainly C1～C15 hydrocarbons,with low selectivity of hydrocarbons of jet fuel,which limits its application in aviation fuel production.The catalysts before and after reaction were characterized by XRD,N2 adsorption/desorption,SEM,Mössbauer,TEM,H2-TPR,NH3-TPD and so on.A new strategy of synthesis of aromatics of jet fuel by coupling of CO hydrogenation and toluene alkylation reaction was proposed.The results show that under the reaction temperature of 260 ℃,pressure of 2.0 MPa,V(H2)/V(CO)=1,reaction space velocity of 1500 mL/(g·h)and toluene space velocity of 0.4 h-1,with Na-Fe+ZSM-5 catalyst,syngas undergoes the Fischer-Tropsch synthesis reaction on the Fe-based catalyst to generate low-carbon(C2～C4)olefins,and subsequently the in situ formed low-carbon olefins undergo alkylation reactions with toluene on the acidic sites of ZSM-5 to produce aromatics of jet fuel.The main components of C8～C16 hydrocarbon products are aromatics,accounting for 72％(mole fraction),which demonstrates that synthesis of aromatics of jet fuel by the coupling of CO hydrogenation and toluene alkylation reaction with tandem catalyst is feasible.关键词
CO加氢/Fe基催化剂/烷基化/ZSM-5/芳烃Key words
CO hydrogenation/Fe-based catalyst/alkylation/ZSM-5/aromatics分类
化学工程引用本文复制引用
白净,林国珍,蒋倩,陈文诚,王晨光..CO加氢耦合甲苯烷基化制喷气燃料段芳烃[J].低碳化学与化工,2025,50(5):83-92,10.基金项目
国家自然科学基金(22308355) （22308355）
广州市科技计划(2023A04J0661). （2023A04J0661）
