摘要
铁催化剂以及钾/锰改性后的铁催化剂在经过碳化预处理后催化剂的结构变化情况存在明显差异。经过350℃下的碳化预处理后,未改性的铁催化剂可以从Fe2O3完全转化成碳化铁;对于钾改性的铁催化剂来说只有经过H2预还原后,样品的碳化过程才可能完成;而对于引入锰助剂后的催化剂,在本文所考察的碳化条件范围内,碳化过程都没有能够完成,也就是说当向铁催化剂体系中引入钾或者锰助剂后,预处理过程中的碳化进程受到了不同程度的阻碍。
Through the experiments of carburizing pretreatments on the iron based catalysts, it was observed that for the pure iron sample, the transformation from Fe2O3 to iron carbide can be achieved by carburization at 350℃, while for the K-modified sample, the process of carburization was inhibited and the complete carburization can only be accomplished with a procedure of H2 prereduction prior to the CO carburization. The process of carburization was inhibited even harder on the Mn-modified sample so that the carburizing process did not complete in either of the conditions operated in the experiment.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2005年第6期6-10,共5页
Natural Gas Chemical Industry
关键词
铁催化剂
碳化
预处理
碳化铁
iron catalyst
pretreatment
carburization
iron carbide
作者简介
王翀（1977-），男，博士生，电邮peter-w@dicp．ac．cn；
联系人，电邮lyxu@dicp.ac.cn
