Influence of hydrothermally modified γ-Al2O3 on the properties of NiMo/γ-Al2O3 catalyst

被引：8

作者：

Li, Juncheng ^{[1
,2
]}

Xiang, Lan ^{[1
]}

Feng, Xu ^{[1
]}

Wang, Zhanwen ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China

[2] China Shenhua Coal Liquefact Corp Ltd, Beijing, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2008年 / 254卷 / 07期

基金：

中国国家自然科学基金;

关键词：

hydrothermal modification; dispersion; HDN; NiMo/gamma-Al2O3; catalyst;

D O I：

10.1016/j.apsusc.2007.08.037

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：

The influence of hydrothermal modification of /gamma-Al2O3 on the properties of NiMo/gamma-Al2O3 catalyst was investigated in this paper. The experimental results showed that the use of the modified gamma-Al2O3 in the preparation of the NiMo/gamma-Al2O3 catalyst led to the increase of the dispersion of the surface Mo and Ni oxides, favored the formation of the poly-molybdates and promoted the reduction of the active Mo oxides owing to the increase of the surface acidity of the modified gamma-Al2O3. Therefore, the NiMo/gamma-Al2O3 catalyst supported on the modified gamma-Al2O3 exhibited a higher hydrodenitrogenation (HDN) activity than that supported on the untreated gamma-Al2O3 in the temperature range of 300-340 degrees C. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：2077 / 2080

页数：4

共 19 条

[1] EFFECT OF ACIDIC AND BASIC VAPORS ON PORE-SIZE DISTRIBUTION OF ALUMINA UNDER HYDROTHERMAL CONDITIONS [J].

ABSIHALABI, M ;

STANISLAUS, A ;

ALZAID, H .

APPLIED CATALYSIS A-GENERAL, 1993, 101 (01) :117-128

[2] Effect of fluoride on the structure and activity of NiW/Al2O3 catalysts for HDS of thiophene and HDN of pyridine [J].

Benitez, A ;

Ramirez, J ;

Fierro, JLG ;

Agudo, AL .

APPLIED CATALYSIS A-GENERAL, 1996, 144 (1-2) :343-364

[3] STUDY OF NI-MO-GAMMA-AL2O3 CATALYSTS BY X-RAY PHOTOELECTRON AND RAMAN-SPECTROSCOPY - COMPARISON WITH CO-MO-GAMMA-AL2O3 CATALYSTS [J].

DUFRESNE, P ;

PAYEN, E ;

GRIMBLOT, J ;

BONNELLE, JP .

JOURNAL OF PHYSICAL CHEMISTRY, 1981, 85 (16) :2344-2351

[4] Support effect in hydrotreating catalysts:: hydrogenation properties of molybdenum sulfide supported on β-zeolites of various acidities [J].

Hédoire, CE ;

Louis, C ;

Davidson, A ;

Breysse, M ;

Maugé, F ;

Vrinat, M .

JOURNAL OF CATALYSIS, 2003, 220 (02) :433-441

[5] STRUCTURE OF MOO3/AL2O3-SIO2 CATALYSTS [J].

HENKER, M ;

WENDLANDT, KP ;

VALYON, J ;

BORNMANN, P .

APPLIED CATALYSIS, 1991, 69 (02) :205-220

[6] The effect of boron addition on hydrodesulfurization and hydrodenitrogenation activity of NiMo/Al2O3 catalysts [J].

Lewandowski, M ;

Sarbak, Z .

FUEL, 2000, 79 (05) :487-495

[7] Activity and structure of hydrotreating Ni, Mo, and Ni-Mo sulfide catalysts supported on γ-Al2O3-USY zeolite [J].

Li, D ;

Nishijima, A ;

Morris, DE ;

Guthrie, GD .

JOURNAL OF CATALYSIS, 1999, 188 (01) :111-124

[8]

Li J. C., 2006, APPL SURF SCI, V253, P766

[9] Characterization of plasma treated Pd/HZSM-5 catalyst for methane combustion [J].

Liu, CJ ;

Yu, KL ;

Zhang, YP ;

Zhu, XL ;

He, F ;

Eliasson, B .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2004, 47 (02) :95-100

[10] Regulation of the dispersion of PdO through the interaction with acid sites of zeolite studied by extended X-ray absorption fine structure [J].

Okumura, K ;

Niwa, M .

JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (41) :9670-9675

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