摘要
从合成气制取低碳烯烃是C1化学化工领域中一个非常有挑战性的研究方向,有间接法和直接法两条路线。以MTO为代表的间接法在工业界已得到了很成功的应用,而直接法流程短、能耗低,与间接法相比更具竞争力,但其工业应用进展缓慢。在相应催化剂研发中,直接法可细分为两条路线:一是耦合双功能催化剂,存在起活温度高、转化率低以及对氢碳比要求高等缺点;二是通过高温费托铁催化剂将合成气一步制取低碳烯烃(FTO)。在高温费托合成铁催化体系中,碱金属和金属氧化物是最重要的两类助剂,在载体方面,除了常用的AlO和SiO2,炭材料和分子筛也得到了越来越多的应用。综述聚焦近年来合成气高温费托合成制低碳烯烃铁基催化剂的研究进展,从助剂和载体两个方面进行相应评述,并对FTO铁基催化剂的发展方向进行了展望。
The production of low-carbon olefins from syngas is a very challenging research direction in the field of C1 chemical industry.There are two routes:indirect method and direct method.The indirect method represented by MTO has been successfully applied in the industry,while the direct method has the advantag⁃es of short process,low energy consumption and more competitiveness compared with the indirect method,but its industrial application progress is slow.In the research and development of corresponding catalysts,the direct method can be divided into two routes:one is the coupling dual-function catalyst,which has the disadvantages of high activation temperature,low conversion rate and high requirements for hydrogen carbon ratio;the other is the one-step production of low-carbon olefins(FTO)from syngas by high-temperature Fischer Tropsch catalyst.In the high temperature Fischer Tropsch synthesis of iron catalyst system,alkali metal and metal oxide are the most important two kinds of promoters.As for the carrier,excludes the com⁃monly used alumina and silica,carbon materials and molecular sieves have also been widely used.The re⁃search progress of iron-based catalysts for synthesis of low-carbon olefins by high-temperature Fischer Tropsch synthesis of syngas in recent years was reviewed,and the development trend of FTO iron-based cat⁃alysts was prospected.
作者
王涛
张雪冰
张琪
孟祥堃
门卓武
WANG Tao;ZHANG Xuebing;ZHANG Qi;MENG Xiangkun;MEN Zhuowu(Beijing Low-carbon Clean Energy Research Institute,Beijing,102209)
出处
《能源科技》
2020年第1期66-71,共6页
Energy Science and Technology
基金
国家重点研发计划(2017YFB0602500)。
关键词
高温费托
合成气
低碳烯烃
催化剂
铁基
High temperature fischer tropsch
Syngas
Light olefin
Catalyzer
Iron-based
