Selective oxidative dehydrogenation of ethane to ethylene over a hydroxylated boron nitride catalyst

Boron nitride containing hydroxyl groups efficiently catalysed oxidative dehydrogenation of ethane to ethylene,offering rather high selectivity（95%） but only small amount of CO2 formation（0.4%） at a given ethane conversion of 11%.Even at high conversion level of 63%,the selectivity of ethylene retained at 80%,which is competitive with the energy-demanding industrialized steam cracking route.A long-term test for 200 h resulted in stable conversion and product selectivity,showing the excellent catalytic stability.Both experimental and computational studies have identified that the hydrogen abstraction of B-OH groups by molecular oxygen dynamically generated the active sites and triggered ethane dehydrogenation.

国内液化乙烷市场培育和发展的探索与实践

近年来,在乙烯裂解利润及其下游衍生物需求旺盛的背景下,乙烷制乙烯项目成为国内市场投资热点。截至目前,国内在建和规划的17个乙烷制乙烯项目中,民营企业成为投资主体,乙烷供应主要来自美国。随着上述项目的陆续投产,2021年我国乙烷制乙烯项目或将迎来第一轮爆发期。乙烷基乙烯将成为乙烯产能的有益补充。尽管如此,起步阶段的中国乙烷制乙烯产业发展仍面临较大不确定性。需要国家有关职能部门给予政策支持。