Combined in situ QXAFS and FTIR analysis of a Ni phosphide catalyst under hydrodesulfurization conditions

被引：46

作者：

Bando, Kyoko K. ^{[1
]}

Wada, Takahiro ^{[2
]}

Miyamoto, Takeshi ^{[2
]}

Miyazaki, Kotaro ^{[2
]}

Takakusagi, Satoru ^{[2
]}

Koike, Yuichiro ^{[3
]}

Inada, Yasuhiro ^{[4
]}

Nomura, Masaharu ^{[3
]}

Yamaguchi, Aritomo ^{[5
]}

Gott, Travis ^{[6
]}

Oyama, S. Ted ^{[6
,7
]}

Asakura, Kiyotaka ^{[2
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Nanosyst Res Inst, Tsukuba, Ibaraki 3058565, Japan

[2] Hokkaido Univ, Catalysis Res Ctr, Kita Ku, Sapporo, Hokkaido 0010021, Japan

[3] High Energy Accelerator Res Org, Inst Mat Struct Sci, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

[4] Ritsumeikan Univ, Coll Life Sci, Kusatsu, Shiga 5258577, Japan

[5] AIST, Natl Inst Adv Ind Sci & Technol, Res Ctr Compact Chem Syst, Miyagino Ku, Sendai, Miyagi 9838551, Japan

[6] Virginia Polytech Inst & State Univ, Dept Chem Engn & Chem, Environm Catalysis & Mat Lab, Blacksburg, VA 24061 USA

[7] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan

来源：

JOURNAL OF CATALYSIS | 2012年 / 286卷

关键词：

Ni2P; HDS; QXAFS; FTIR; Thiophene; MCM-41; In situ; Simultaneous time-resolved study; X-RAY-ABSORPTION; FINE-STRUCTURE; THIOPHENE HYDRODESULFURIZATION; MOLYBDENUM PHOSPHIDE; EXAFS MEASUREMENTS; DISPERSIVE EXAFS; QUICK; XAFS; SPECTROSCOPY; PHASE;

D O I：

10.1016/j.jcat.2011.10.025

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：

Supported Ni2P catalysts are active for hydrodesulfurization (HDS) of petroleum feedstocks and have attracted considerable attention. In order to find out the structure of the active catalyst and to obtain insight into the reaction mechanism of thiophene HDS over Ni2P/MCM-41, we conducted a simultaneous time-resolved (STR) study with in situ X-ray absorption fine structure (XAFS) spectroscopy and Fourier transform infrared (FTIR) spectroscopy together with time-resolved product analysis. At 513 K. adsorbed tetrahydrothiophene (THT) was observed by RIR, following the formation of a nickel phosphosulfide phase (NiPS). Detection of the HDS products coincided with the THT formation. All these experimental data indicated that NiPS worked as the active phase and identified THT as a reaction intermediate for the HDS reaction. The STR study proved to be a powerful tool for the precise study of reaction intermediates and the catalytic reaction path. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：165 / 171

页数：7

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