Coking and deactivation of a mesoporous Ni-CaO-ZrO2 catalyst in dry reforming of methane: A study under different feeding compositions

被引：91
作者：
Wang, Changzhen [1 ,2 ]
Sun, Nannan [3 ]
Zhao, Ning [2 ]
Wei, Wei [2 ,3 ]
Sun, Yuhan [3 ]
Sun, Chenggong [4 ]
Liu, Hao [4 ]
Snape, Colin E. [4 ]
机构：
[1] Shanxi Univ, Engn Res Ctr, Minist Educ Fine Chem, Taiyuan 030006, Peoples R China
[2] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
[3] Chinese Acad Sci, Shanghai Adv Res Inst, Ctr Greenhouse Gas & Environm Engn, Shanghai 201203, Peoples R China
[4] Univ Nottingham, Fac Engn, Energy & Sustainabil Res Div, Nottingham NG7 2RD, England
来源：
FUEL | 2015年 / 143卷
基金：
中国国家自然科学基金;
关键词：
Nickel catalyst; CO2; reforming; Carbon deposition; Deactivation; Feeding composition; CARBON-DIOXIDE; SYNTHESIS GAS; NANOCRYSTALLINE ZIRCONIA; NICKEL-CATALYSTS; CO2; CH4; CONVERSION; TEMPERATURE; DEPOSITION; NI/LA2O3;
D O I：
10.1016/j.fuel.2014.11.097
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A previously developed mesoporous Ni-CaO-ZrO2 catalyst (NCZ) was submitted to dry reforming of methane (DRM), and the influence of feeding compositions on the properties of accumulated carbon was comprehensively studied. To this end, the used catalysts (NCZ-x) were characterized with a particular focus on the carbon residuals, using X-ray diffraction, N-2 adsorption, transmission electron microscope, scanning electron microscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy, etc. The results indicate that by varying the composition of the feeding gas, the morphology and chemical inertness of the accumulated carbon changed considerably, and the deactivation of the NCZ catalyst under CH4-rich conditions can be associated with the formation of coating carbon species that leads to the coverage of highly active Ni nano particles (NPs). (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：527 / 535
页数：9
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