Record number :
1672397
Title of article :
Hydrogen production by steam reforming of liquefied natural gas (LNG) over mesoporous nickel–alumina xerogel catalysts prepared by a single-step carbon-templating sol–gel method
Author/Authors :
Bang، نويسنده , , Yongju and Lee، نويسنده , , Joongwon and Han، نويسنده , , Seung Ju and Seo، نويسنده , , Jeong Gil and Youn، نويسنده , , Min Hye and Song، نويسنده , , Ji Hwan and Song، نويسنده , , In Kyu، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
10
From page :
11208
To page :
11217
Abstract :
A series of mesoporous nickel–alumina xerogel catalysts (denoted as CNAX) were prepared by a single-step carbon-templating sol–gel method using different amount of carbon template (X), and they were applied to the hydrogen production by steam reforming of liquefied natural gas (LNG). Textural properties of CNAX catalysts were improved with increasing the amount of carbon template. CNAX catalysts exhibited diffraction peaks corresponding to nickel aluminate phase, while CNA18 and CNA24 catalysts showed additional bulk nickel oxide phase. From TPR measurements, it was revealed that the interaction between nickel species and alumina in the CNAX catalysts became weakened with increasing the amount of carbon template. Crystallite size of metallic nickel in the reduced CNAX catalysts showed a volcano-shaped trend with respect to the amount of carbon template. In the steam reforming of LNG, CNAX (X = 0, 6, 12, and 18) catalysts exhibited a stable catalytic performance during the reaction, while CNA24 catalyst showed a significant catalyst deactivation. Crystallite size of metallic nickel served as an important factor determining the catalytic performance in the steam reforming of LNG. Initial LNG conversion and initial hydrogen yield increased with decreasing crystallite size of metallic nickel of the catalysts. Among the catalysts tested, CNA12 catalyst with the smallest crystallite size of metallic nickel showed the best catalytic performance.
Keywords :
Single-step sol–gel method , Carbon-templating , Mesoporous nickel-alumina xerogel catalyst , Hydrogen production , Steam reforming of liquefied natural gas
Journal title :
International Journal of Hydrogen Energy
Serial Year :
2012
Link To Document :
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