One-pot synthesis of ordered mesoporous Ni-V-Al catalysts for CO methanation

TY - JOUR

T1 - One-pot synthesis of ordered mesoporous Ni-V-Al catalysts for CO methanation

AU - Liu, Qing

AU - Gao, Jiajian

AU - Gu, Fangna

AU - Lu, Xiaopeng

AU - Liu, Youjun

AU - Li, Huifang

AU - Zhong, Ziyi

AU - Liu, Bin

AU - Xu, Guangwen

AU - Su, Fabing

N1 - Publisher Copyright: © 2015 Elsevier B.V. All rights reserved.

PY - 2015/6/1

Y1 - 2015/6/1

N2 - Preventing both the sintering of Ni particles and the coke formation in supported nickel (Ni) catalysts is a great challenge in catalysis. To address the problem, in this work, we have designed and synthesized a series of ternary Ni-V-Al metal oxide composites with desired structure and composition, for example, the ordered mesoporous structure and various V contents. The catalysts are synthesized via a facile one-pot evaporation-induced self-assembly strategy and are used in CO methanation reaction to produce synthetic natural gas. Our results showed that the Ni-V-Al catalysts with ordered mesopores have better catalytic properties than the impregnation-derived Ni catalysts supported on alumina supports with ordered mesopores or with unordered mesopores. The addition of proper amount of vanadium oxide in the ordered mesoporous Ni-V-Al catalysts further promotes the catalytic activity toward CO methanation. In a 110 h atmospheric-pressure lifetime test, the ordered mesoporous Ni-V-Al catalyst showed significant improvement in both anti-coking and anti-sintering, mainly because of the smaller Ni particle size (<5 nm), the confinement effect of the mesopore channels as well as the incorporation of the vanadium promoter as compared to the catalyst without ordered mesopores.

AB - Preventing both the sintering of Ni particles and the coke formation in supported nickel (Ni) catalysts is a great challenge in catalysis. To address the problem, in this work, we have designed and synthesized a series of ternary Ni-V-Al metal oxide composites with desired structure and composition, for example, the ordered mesoporous structure and various V contents. The catalysts are synthesized via a facile one-pot evaporation-induced self-assembly strategy and are used in CO methanation reaction to produce synthetic natural gas. Our results showed that the Ni-V-Al catalysts with ordered mesopores have better catalytic properties than the impregnation-derived Ni catalysts supported on alumina supports with ordered mesopores or with unordered mesopores. The addition of proper amount of vanadium oxide in the ordered mesoporous Ni-V-Al catalysts further promotes the catalytic activity toward CO methanation. In a 110 h atmospheric-pressure lifetime test, the ordered mesoporous Ni-V-Al catalyst showed significant improvement in both anti-coking and anti-sintering, mainly because of the smaller Ni particle size (<5 nm), the confinement effect of the mesopore channels as well as the incorporation of the vanadium promoter as compared to the catalyst without ordered mesopores.

KW - CO methanation

KW - Confinement effect

KW - Ni-V-Al catalyst

KW - One-pot synthesis

KW - Ordered mesopores

UR - http://www.scopus.com/inward/record.url?scp=84929310494&partnerID=8YFLogxK

U2 - 10.1016/j.jcat.2015.04.003

DO - 10.1016/j.jcat.2015.04.003

M3 - 文章

AN - SCOPUS:84929310494

SN - 0021-9517

VL - 326

SP - 127

EP - 138

JO - Journal of Catalysis

JF - Journal of Catalysis

ER -