Formation of active sites and hydrodesulfurization activity of rhodium phosphide catalyst: Effect of reduction temperature and phosphorus loading

被引：19

作者：

Kanda, Yasuharu ^{[1
]}

Temma, Chisato ^{[2
]}

Sawada, Ayaka ^{[3
]}

Sugioka, Masatoshi ^{[4
]}

Uemichi, Yoshio ^{[1
]}

机构：

[1] Muroran Inst Technol, Grad Sch Engn, Coll Environm Technol, Appl Chem Res Unit, Muroran, Hokkaido 0508585, Japan

[2] Muroran Inst Technol, Grad Sch Engn, Div Appl Chem, Muroran, Hokkaido 0508585, Japan

[3] Muroran Inst Technol, Grad Sch Engn, Div Chem & Mat Engn, Muroran, Hokkaido 0508585, Japan

[4] Muroran Inst Technol, Grad Sch Engn, Coll Design & Mfg Technol, Aeronaut & Astronaut Unit, Muroran, Hokkaido 0508585, Japan

来源：

APPLIED CATALYSIS A-GENERAL | 2014年 / 475卷

关键词：

Rhodium phosphide catalyst; Hydrodesulfurization; Phosphorus loading; Reduction temperature; Active site formation; SILICA-SUPPORTED MOLYBDENUM; THIOPHENE HYDRODESULFURIZATION; HYDROPROCESSING CATALYSTS; METAL; PERFORMANCE; MCM-41; DIBENZOTHIOPHENE; CARBIDE; PHASE; NI2P;

D O I：

10.1016/j.apcata.2014.01.049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Effects of reduction temperature and phosphorus loading on rhodium phosphide (Rh2P) formation and on the catalytic activity of Rh-xP catalysts for hydrodesulfurization (HDS) were investigated to prepare highly active HDS catalysts. Analysis of the Rh-xP catalysts showed that a suitable P loading for HDS activity is 1.5 wt%-four times greater than that of an Rh catalyst. Temperature-programmed reduction and X-ray diffraction analyses of the Rh-xP catalysts showed that Rh2P is readily formed in catalysts with higher P loading. In contrast, the results of transmission electron microscopy observation and CO adsorption experiments indicated that the Rh2P particle size increased with increasing P content. Thus, the high HDS activity of the Rh-1.5P catalyst was explained by the formation of small Rh2P at a relatively low reduction temperature (550 degrees C). (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：410 / 419

页数：10

共 41 条

[1] Thiophene hydrodesulfurization over alumina-supported molybdenum carbide and nitride catalysts: Adsorption sites, catalytic activities, and nature of the active surface [J].