合成气
复合材料
材料科学
MCM-41
化学
催化作用
有机化学
分子筛
作者
Yilun Ding,Dengyun Miao,Jingyao Feng,Bing Bai,Xiulian Pan,Xinhe Bao
标识
DOI:10.1016/j.apcatb.2022.121628
摘要
Direct syngas conversion to gasoline-range hydrocarbons particularly environmental-friendly, high octane number multi-branched isoparaffins attracts wide attention from both academia and industry but remains challenging. We report herein that ZnCrOx-HMCM-22 upon phosphorus modification enables selective syngas conversion to gasoline (C5-C11) with a selectivity of 77%. Following a simple hydrogenation in the same reactor, the fraction of isoparaffins among gasoline reaches 67%, particularly multi-branched isoparaffins as high as 27.5%, which is three times higher than that obtained by FTS-zeolites and four times higher than that in commercial 92# gasoline. This is attributed to the inhibited hydrogenation of olefins over the acid sites of phosphorus modified MCM-22 with weakened strength. Thus, methylation of olefins is significantly facilitated leading to formation of multi-branched isohydrocarbons. The fundamental understanding gained here will allow further optimization and development of catalysts for direct syngas conversion to high-quality gasoline.
科研通智能强力驱动
Strongly Powered by AbleSci AI