The effect of cobalt addition to bulk MoP and Ni2P catalysts for the hydrodesulfurization of 4,6-dimethyldibenzothiophene

被引：173

作者：

Abu, Ibrahim I. ^{[1
]}

Smith, Kevin J. ^{[1
]}

机构：

[1] Univ British Columbia, Dept Biol & Chem Engn, Vancouver, BC V6T 1Z3, Canada

来源：

JOURNAL OF CATALYSIS | 2006年 / 241卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

hydrodesulfurization; metal phosphide; cobalt; catalyst; 4,6-dimethyldibenzothiophene;

D O I：

10.1016/j.jcat.2006.05.010

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：

Bulk metal phosphide catalysts with nominal composition CoxNi2P (0 <= x <= 0.34) and Co0.07MoP were investigated for the hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene (4,6-DMDBT) at 583 K and 3.0 MPa H-2. The selectivity for the direct desulfurization (DDS) of 4,6-DMDBT to the product dimethylbiphenyl (DMBP) increased to 49 and 31% over the Co0.08Ni2P and Co0.07MOP catalysts, respectively, compared with the < 3% DMBP selectivity obtained on bulk Ni2P and MoP. Analysis by X-ray photoelectron spectroscopy (XPS) showed that the addition of the Co to MoP and Ni2P resulted in a P enrichment of the catalyst surface. Among the CoxNi2P and Co0.07MOP catalysts studied, the maximum DMBP selectivity occurred for the Co0.08Ni2P catalyst; this catalyst had the highest n-propylamine uptake and lowest CO uptake and the highest P/metal atom ratio, as determined by XPS. The increased selectivity to DMBP suggests that acid sites associated with phosphorous promote skeletal isomerization of 4,6-DMDBT to yield products that readily undergo DDS on the metal sites of the CoxNi2P (0 <= x <= 0.34) and Co0.07MoP catalysts. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：356 / 366

页数：11

共 37 条

[21] Hydrodesulfurization of petroleum feedstocks with a new type of nonsulfide hydrotreating catalyst [J].

Oyama, ST ;

Wang, X ;

Requejo, FG ;

Sato, T ;

Yoshimura, Y .

JOURNAL OF CATALYSIS, 2002, 209 (01) :1-5

[22] XAFS characterization of highly active alumina-supported molybdenum phosphide catalysts (MoP/Al203) for hydrotreating [J].

Oyama, ST ;

Clark, P ;

da Silva, VLST ;

Lede, EJ ;

Requejo, FG .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (21) :4961-4966

[23] Synthesis, characterization, and hydrodesulfurization properties of silica-supported molybdenum phosphide catalysts [J].

Phillips, DC ;

Sawhill, SJ ;

Self, R ;

Bussell, ME .

JOURNAL OF CATALYSIS, 2002, 207 (02) :266-273

[24]

Prins R, 2001, CHIMIA, V55, P791

[25] New catalysts for hydroprocessing: Bimetallic oxynitrides II. Reactivity studies [J].

Ramanathan, S ;

Yu, CC ;

Oyama, ST .

JOURNAL OF CATALYSIS, 1998, 173 (01) :10-16

[26] Physical and chemical properties of MoP, Ni2P, and MoNiP hydrodesulfurization catalysts:: Time-resolved X-ray diffraction, density functional, and hydrodesulfurization activity studies [J].

Rodriguez, JA ;

Kim, JY ;

Hanson, JC ;

Sawhill, SJ ;

Bussell, ME .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (26) :6276-6285

[27] Thiophene hydrodesulfurization over nickel phosphide catalysts: effect of the precursor composition and support [J].

Sawhill, SJ ;

Layman, KA ;

Van Wyk, DR ;

Engelhard, MH ;

Wang, C ;

Bussell, ME .

JOURNAL OF CATALYSIS, 2005, 231 (02) :300-313

[28] Thiophene hydrodesulfurization over supported nickel phosphide catalysts [J].

Sawhill, SJ ;

Phillips, DC ;

Bussell, ME .

JOURNAL OF CATALYSIS, 2003, 215 (02) :208-219

[29]

SENZI L, 1998, J CATAL, V173, P134

[30] New design approaches to ultra-clean diesel fuels by deep desulfurization and deep dearomatization [J].

Song, C ;

Ma, XL .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 41 (1-2) :207-238

← 1 2 3 4 →