Reaction Mechanism and Catalytic Impact of Ni/CeO2-x Catalyst for Low-Temperature CO2 Methanation

被引：104
|
作者：
Lee, Sang Moon [1 ]
Lee, Ye Hwan [1 ]
Moon, Dea Hyun [1 ]
Ahn, Jeong Yoon [1 ]
Dinh Duc Nguyen [2 ]
Chang, Soon Woong [1 ]
Kim, Sung Su [1 ]
机构：
[1] Kyonggi Univ, Dept Environm Energy Engn, 94-6 San, Suwon 443760, Gyeonggi Do, South Korea
[2] Duy Tan Univ, Inst Res & Dev, Da Nang, Vietnam
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2019年 / 58卷 / 20期
关键词：
GROUP-VIII METALS; CARBON-DIOXIDE; RU/TIO2; CATALYSTS; HETEROGENEOUS CATALYSTS; NI/AL2O3; HYDROGENATION; CERIA; CONVERSION; OXIDATION; SURFACES;
D O I：
10.1021/acs.iecr.9b00983
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Ni supported on calcined ceria nitrate catalyst is highly active and stable for low-temperature CO2 methanation reaction (CO2 conversion: 70% at 180 degrees C, 0.05 bar, and gas hourly space velocity (GHSV) of 14 400 L kg(-1) h(-1)). We investigated CO2 adsorption and CO2 + H-2 reaction on the surface of Ni/CeO2 and Ni/CeO2-x catalysts to examine the structure and strength of adsorbed species using diffuse reflection infrared Fourier transform spectroscopy (DRIFTS). At temperature of 180 degrees C, weakly adsorbed bridged carbonate was generated on the surface of CeO2-x support by new active sites of oxygen vacancies created by addition of H-2. High reducibility of Ni/CeO2 catalyst played an important role in increasing low-temperature CO2 methanation catalytic activity.
引用
收藏
页码：8656 / 8662
页数：7
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