文献类型：期刊文献

英文题名：Crucial roles of support modification and promoter introduction in Fe/CNT catalyzed syngas conversion to lower olefins

作者：Fang, Yuan[1];Cao, Junbo[1];Zhang, Xinxin[1];Cao, Yueqiang[1];Song, Nan[1];Qian, Gang[1];Zhou, Xinggui[1];Duan, Xuezhi[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：368

起止页码：126

外文期刊名：CATALYSIS TODAY

收录：;EI(收录号：20200908242488);WOS:【SCI-EXPANDED(收录号:WOS:000636688900004)】；

基金：This work was financially supported by the Natural Science Foundation of China (21922803, 21776077 and 91434117) , the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, the Natural Science Foundation of Shanghai (17ZR1407300) , the Shanghai RisingStar Program (17QA1401200) , the Fundamental Research Funds for the Central Universities (222201718003) and the Open Project of State Key Laboratory of Chemical Engineering (SKLChe15C03) .

语种：英文

外文关键词：Fe Fischer-Tropsch catalyst; Lower olefins; Carbon nanotubes; Support modification; Promoter effects

摘要：Producing lower olefins via iron-based Fischer-Tropsch synthesis without intermediate process has received increasing interests. Herein, effects of support modification on FTO performance of CNT supported Fe catalysts are comparatively investigated. Employing the defect-rich CNT as the catalyst support compared to the pristine CNT support is found to exhibit the shorter induction period and higher iron time yield (FTY). The promotional effects of K and Mn promoters on the FTO performance are subsequently revealed on the defect-rich CNT supported Fe catalysts. Both promoters are observed to suppress the formation of undesirable methane and to enhance the selectivity to desirable lower olefins. Moreover, the introduction of the Mn promoter facilitates the dispersion of iron particles and thus shows higher FTY, and it also gives rise to much higher catalyst stability than the K promoter. The insights reported here could guide the design and optimization of promoted Fe/C FTO catalysts.