铁基催化剂活性相调控及其催化CO_(2)加氢制线性α-烯烃研究进展  

Research progress on active phases regulation of iron-based catalysts and their CO_(2) catalytic hydrogenation to linearα-olefins

作　　者：高新华 夏世钦 梁洁 江永军 张伟 郭庆杰 王晨 段斌 GAO Xinhua;XIA Shiqin;LIANG Jie;JIANG Yongjun;ZHANG Wei;GUO Qingjie;WANG Chen;DUAN Bin(State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,School of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,Ningxia,China;Institute of Coal Chemical Industry Technology,National Energy Group Ningxia Coal Industry Co.,Ltd.,Yinchuan 750411,Ningxia,China;Ningxia Academy of Metrology&Quality Inspection,National Quality Supervision and Inspection Center for Coal and Coal Chemical Products(Ningxia),Yinchuan 750200,Ningxia,China)

机构地区：[1]宁夏大学化学化工学院,省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏银川750021 [2]国家能源集团宁夏煤业有限责任公司煤炭化学工业技术研究院,宁夏银川750411 [3]国家煤及煤化工产品质量检验检测中心(宁夏)宁夏计量质量检验检测研究院,宁夏银川750200

出　　处：《低碳化学与化工》2023年第5期1-8,共8页Low-Carbon Chemistry and Chemical Engineering

基　　金：国家自然科学基金(21965029);宁夏自然科学基金(2022AAC03040,2022AAC01001)。

摘　　要：线性α-烯烃(LAOs)作为重要的化工原料,通常用于共聚单体、合成润滑油、增塑剂用醇和油品添加剂。以二氧化碳(CO_(2))和氢气(H_(2))作为原料,通过CO_(2)加氢反应生产LAOs可以缓解温室效应、实现CO_(2)高值化利用,具有重要意义。CO_(2)加氢制LAOs一般包括逆水煤气变换(RWGS)和费托合成(FTS)两个步骤,四氧化三铁(Fe_(3)O_(4))和碳化铁(χ-Fe_(5)C_(2)等)可分别催化RWGS和FTS反应,因此Fe基催化剂是当前的研究热点。介绍了Fe基催化剂的物相演变过程及其失活机制,重点分析了载体、助剂和表面改性对促进χ-Fe_(5)C_(2)活性相生成、调控Fe_(3)O_(4)/χ-Fe_(5)C_(2)比例(物质的量之比)和维持χ-Fe_(5)C_(2)相稳定的作用,总结了Fe基催化剂上CO_(2)加氢制LAOs面临的主要问题以及未来的研究方向。As an important chemical raw material,linearα-olefins(LAOs)are usually used for the copolymerization of monomers and the synthesis of lubricants,plasticizers and oil additives.It is of great significance to use carbon dioxide(CO_(2))and hydrogen(H_(2))as raw materials to produce LAOs through CO_(2) hydrogenation reaction,which can alleviate the greenhouse effect and realize high value utilization of CO_(2).CO_(2) hydrogenation to LAOs generally consists of two steps:Reverse water gas shift(RWGS)and Fischer-Tropsch synthesis(FTS).Ferroferric oxide(Fe_(3)O_(4))and iron carbide(χ-Fe_(5)C_(2) et al.)can catalyze RWGS and FTS reactions,respectively,so Fe-based catalysts are currently the focus of research.The phase evolution process and deactivation mechanism of Fe-based catalysts were discussed.The effects of supports,promoters and surface modification on promoting the generation ofχ-Fe_(5)C_(2) active phase,regulating the ratio of Fe_(3)O_(4)/χ-Fe_(5)C_(2)(mole fraction),and maintaining the stability ofχ-Fe_(5)C_(2) phase were emphatically analyzed.The main problems and future research directions of CO_(2) hydrogenation to LAOs on Fe-based catalysts were summarized.

关 键 词：线性Α-烯烃 CO_(2)加氢 Fe基催化剂 活性相 

分 类 号：TQ426[化学工程]