Title晶面调控实现合成气低温制备烯烃过程
Other TitlesSyngas Conversion to Lower Olefins via Facet Regulating
Authors马丁
Affiliation北京大学化学与分子工程学院
Keywords气低温
制备烯烃
低碳烯烃
SELECTIVE CONVERSION
LIGHT OLEFINS
CATALYST
Issue Date2017
Publisher化学进展
Citation化学进展.2017,29(1),5-6.
Abstract低碳烯烃(包括乙烯、丙烯、丁烯)是合成塑料、橡胶、纤维等高分子化合物的重要平台分子,也是全球产量最大的化学品。低碳烯烃主要是经由石油化工途径而获得。然而随着石油资源日趋枯竭,开发低碳烯烃制备新途径势在必行。我国储量巨大的煤以及天然气、生物质等含碳资源均可以通过合成气(CO和H_2混合气)途径转化为低碳烯烃。目前工业上常用的方法是两步法(methanol to olefins, MTO),即首先将合成气在铜系催化剂作用下制备甲醇,然后在分子筛催化剂作用下将甲醇转化为低碳烯烃。近期,我国科学界把高温甲醇合成催化剂和MTO催化剂偶联,从而实现了一步从合成气直接制备烯烃并取得了重大的突破。与此同时,Na,Zn改性的碳化铁(Fe_5C_2)催化剂也被观察到可以在300~340 C区间实现高转化率下的合成气一步转化制备烯烃。
Lower olefins are essential feedstock in polymeric industry, and therefore a direct syngas conversion route is challenging, yet highly demanding. Sun's group achieve 61% selectivity toward lower olefins over CoMn catalyst at mild conditions. It is found that the formation of Co2C nanoprism with unique facets contributed to the astonishing performance.
URIhttp://hdl.handle.net/20.500.11897/476301
DOI10.1038/nature19786
IndexedSCI(E)
中国科学引文数据库(CSCD)
Appears in Collections:化学与分子工程学院

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