Structural and textural evolution of Ni/γ-Al2O3 catalyst under hydrothermal conditions

被引：43
作者：
Li, Haitao [1 ]
Xu, Yalin [1 ]
Gao, Chunguang [1 ]
Zhao, Yongxiang [1 ]
机构：
[1] Shanxi Univ, Minist Educ Fine Chem, Engn Res Ctr, Sch Chem & Chem Engn, Taiyuan 030006, Shanxi, Peoples R China
来源：
CATALYSIS TODAY | 2010年 / 158卷 / 3-4期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Hydrothermal treatment; Ni/gamma-Al(2)O(3) catalyst; Boehmite; Hydration; NI/AL2O3; CATALYSTS; NICKEL-CATALYSTS; GAMMA-ALUMINA; HYDROGENATION; DECOMPOSITION; SURFACE; HYDRODECHLORINATION; DEHYDROGENATION; DEACTIVATION; GAMMA-AL2O3;
D O I：
10.1016/j.cattod.2010.07.015
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The influence of hydrothermal treatment on the structural and textural properties of Ni/gamma-Al(2)O(3) catalysts is investigated by means of X-ray diffraction (XRD), H(2)-TPR, TG-DSC and N(2) physisorption. After hydrothermally treated at 90-150 degrees C and 8-48 h, the gamma-Al(2)O(3) support transforms into its hydrated phase, boehmite [gamma-AlO(OH)]. And the content of gamma-AlO(OH) increases with the hydrothermal temperature and time increasing. Furthermore, the hydration of gamma-Al(2)O(3) support induces the aggregation of carried Ni crystallite and decreases the BET specific surface area and pore volume, and also reduces the interaction between Ni and gamma-Al(2)O(3) support. The above structural and textural changes further cause the hydrogenation activity decay of Ni/gamma-Al(2)O(3) catalyst. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：475 / 480
页数：6
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