文献类型：期刊文献

英文题名：Tailoring of Fe/MnK-CNTs Composite Catalysts for the Fischer-Tropsch Synthesis of Lower Olefins from Syngas

作者：Chen, Bingxu[1,2];Zhang, Xinxin[1];Chen, Wenyao[1];Wang, Di[1];Song, Nan[1];Qian, Gang[1];Duan, Xuezhi[1];Yang, Jia[2];Chen, De[2];Yuan, Weikang[1];Zhou, Xinggui[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

年份：2018

卷号：57

期号：34

起止页码：11554

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20183505754158);WOS:【SCI-EXPANDED(收录号:WOS:000443654100009)】；

基金：This work was supported by the Natural Science Foundation of China (21776077), Shanghai NSF (17ZR1407300 and 17ZR1407500), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, the Shanghai Rising-Star Program (17QA1401200), Open Project of SKLOCE (SKL-Che-15C03), Fundamental Research Funds for the Central Universities (22201718003), and the 111 Project of the Ministry of Education of China (B08021). B.X.C. thanks support from China Scholarship Council (CSC) for his study at NTNU.

语种：英文

外文关键词：Carbon nanotubes - Catalyst selectivity - Manganese compounds - Synthesis gas - Manganese - Potash - Redox reactions - Olefins

摘要：Iron-catalyzed conversion of coal/biomass-derived syngas directly to lower olefins through Fischer-Tropsch synthesis (i.e., FTO) is a sustainable and short-flow process. Herein, effects of Mn and K promoter loadings on FTO performance over the Fe-based catalyst supported on the promoter-adjustable carbon nanotubes (Fe/MnxKy-CNTs) are systematically studied. Several MnxKy-CNTs are prepared by the treatment of CNTs using aqueous KMnO4 solution via a redox reaction, where promoter loadings are tailored by changing the aqueous KMnO4 solution concentration and water amount for sample washing. FTO performance of these catalysts suggests that the increase in Mn and K loadings shows the enhanced lower olefins selectivity but suppressed activity. The resultant Fe/Mn16.5K1.2-CNTs exhibit the highest lower olefins yield. Further increasing K promoter content leads to slightly enhanced activity to lower olefins but dramatically suppressed CH4 formation and enhanced chain growth. Moreover, appropriate precarburization temperature can facilitate the activity and selectivity toward lower olefins formation.