Ultra-stable porous yolk-shell Ni catalysts for the steam reforming of methane with alkali poisoning

被引：19
|
作者：
Jeon, Kyung-Won [1 ]
Kim, Jin Koo [2 ]
Kim, Beom-Jun [3 ]
Jang, Won-Jun [1 ]
Kang, Yun Chan [2 ]
Roh, Hyun-Seog [3 ]
机构：
[1] Kyungnam Univ, Dept Environm & Energy Engn, 7 Kyungnamdaehak Ro, Chang Won 51767, South Korea
[2] Korea Univ, Dept Mat Sci & Engn, 145 Anam Ro, Seoul 02841, South Korea
[3] Yonsei Univ, Dept Environm & Energy Engn, 1 Yonseidae Gil, Wonju 26493, South Korea
来源：
CHEMICAL ENGINEERING JOURNAL | 2023年 / 454卷
基金：
新加坡国家研究基金会;
关键词：
Ni/Al2O3; catalysts; Porous yolk-shell; Alkali resistance; Steam reforming of methane; Carbon deposition; CHEMICAL CONVERSION; LOW-TEMPERATURE; CARBON-DIOXIDE; HYDROGEN-PRODUCTION; KINETIC ASSESSMENT; SITE REQUIREMENTS; REACTION PATHWAYS; FUEL-CELLS; CO2; RESISTANT;
D O I：
10.1016/j.cej.2022.140060
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Hydrogen, a clean energy carrier, can be produced from renewable sources such as biomass and waste, but it is needed to develop new catalysts with high resistance against impurities. Ni/Al2O3 yolk-shell catalysts were prepared by different procedure for the steam reforming of methane reaction with alkali poisoning. Yolk-shell (ys) and porous yolk-shell (pys) materials were synthesized using a spray pyrolysis process. The physicochemical and structural properties of the prepared catalysts on the reaction performance and alkali resistance were investigated. All the yolk-shell catalysts exhibited high resistance to carbon deposition. The Ni/pys-Al2O3 catalyst showed the highest CH4 conversion and the best stability at a gas hourly space velocity of 932,492 mL center dot g(-1)center dot h(-1) even upon exposure to alkali hydroxide vapor. It also showed strong resistance to sintering, whereas the structures of the ys-Ni-Al2O3 and Ni/ys-Al2O3 catalysts were relatively degraded under the same conditions.
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页数：16
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