铁基费托催化剂预处理过程的原位表征技术研究进展  

Research progress on the in-situ characterizations of iron-based FTS catalysts pretreatment process

作　　者：韩宇静 王会香[1,3] 王连成 黄冬梅[1] 王鹏飞[1] 吕宝亮 HAN Yu-jing;WANG Hui-xiang;WANG Lian-cheng;HUANG Dong-mei;WANG Peng-fei;LÜBao-liang(State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Chemistry and Materials Science,Shanxi Normal University,Taiyuan 030031,China)

机构地区：[1]中国科学院山西煤炭化学研究所、煤转化国家重点实验室,山西太原030001 [2]中国科学院大学,北京100049 [3]山西师范大学化学与材料科学学院,山西太原030031

出　　处：《燃料化学学报（中英文）》2023年第4期458-472,共15页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21972158);中国科学院联合基金(2021017);山西省留学基金委科研项目(2020-196);山西省青年科学基金(201901D211583);山西省博士创业基金(SQ2019006)资助。

摘　　要：铁基费托合成(FTS)催化剂通常以氧化物前驱体α-Fe_(2)O_(3)的形式存在,在不同预处理条件下转变为铁碳化合物FexCy后具有不同的催化活性,因此,研究催化剂预处理过程对费托合成反应具有重要意义。然而该过程中物相体系高度动态复杂,通过常规表征手段无法捕捉到铁基催化剂准确的变化信息。为了深入探究前驱体α-Fe_(2)O_(3)体系在不同预处理过程中的真实变化,需要借助多种原位表征技术获取催化剂物相、形貌及其表面结构和性质的动态变化数据,从而可实现催化剂预处理过程和后续FTS催化性能的有效关联。本工作系统综述了X射线衍射、透射电子显微镜、X射线光电子能谱、红外光谱和拉曼光谱等原位表征技术在铁基FTS催化剂预处理过程中的实验方法以及数据处理方法,以明晰催化剂前驱体复杂的结构性质变化过程,进而促进更高效铁基FTS催化剂的设计和开发。Fe-based Fischer-Tropsch synthesis(FTS)catalysts usually exist as the oxide precursorα-Fe_(2)O_(3),which have different catalytic activities after being transformed to FexCy under different pretreatment conditions,so it is critical to study the pretreatment process ofα-Fe_(2)O_(3)for whole FTS reaction.However,the phases of Fe-based catalysts in such a process are highly dynamic and complex,and conventional characterizations cannot capture the accurate real-time information in the pretreatment reaction.Therefore,it is necessary and desired to apply various in-situ characterizations in this process,because they can obtain the dynamic changes of phase,morphology,surface structure and properties of the catalyst.And then a relationship between the pretreatment process and the subsequent catalytic performance of FTS will be effectively and reasonably established.This review presents a systematic summary of the experimental and data processing methods in in-situ characterizations of X-ray diffraction,transmission electron microscopy,X-ray photoelectron spectroscopy,infrared spectroscopy and Raman spectroscopy during the pretreatment of Fe-based FTS catalysts.These characterizations can clarify the complex structure and surface property changes of catalyst precursors and thus will facilitate the design and development of more efficient Fe-based FTS catalysts.

关 键 词：费托合成 铁基催化剂 预处理过程 原位表征 

分 类 号：O643.36[理学—物理化学]