六亚甲基四胺
催化作用
加氢脱硫
X射线光电子能谱
钼
二苯并噻吩
碳化
热处理
材料科学
碳化物
加氢脱氮
氢
打赌理论
碳纤维
核化学
无机化学
化学工程
化学
扫描电子显微镜
复合数
有机化学
冶金
工程类
复合材料
作者
Zhiqiang Wang,Zhongbiao Zhang,Minghui Zhang
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2010-12-14
卷期号:40 (5): 1098-1104
被引量:26
摘要
An efficient method for preparation of Mo(2)C catalyst is described, where Mo(2)C is obtained by the heat treatment of a single solid precursor containing (NH(4))(6)Mo(7)O(24) and hexamethylenetetramine (HMT) at 923 K in H(2) flow without conventional prolonged carbonization. The catalysts are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), BET surface area measurement, and transmission electron microscopy (TEM). Furthermore, these catalysts are evaluated in the dibenzothiophene (DBT) hydrodesulfurization (HDS) reaction, and proved to be superior to those prepared by a temperature-programmed reduction (TPRe) method. The better catalytic performance is ascribed to higher dispersion of Mo(2)C on the support and a lower surface polymeric carbon content. This hydrogen thermal treatment (HTT) method provided a new strategy for the preparation of a highly active molybdenum carbide catalyst.
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