甲烷化
催化作用
空间速度
镍
尖晶石
材料科学
分解
甲烷
色散(光学)
无机化学
化学工程
化学
冶金
有机化学
工程类
物理
光学
选择性
作者
Jiahui Yu,Bingge Feng,Shuai Liu,Xueliang Mu,Edward Lester,Tao Wu
出处
期刊:Applied Energy
[Elsevier]
日期:2022-04-07
卷期号:315: 119036-119036
被引量:26
标识
DOI:10.1016/j.apenergy.2022.119036
摘要
In this work, a novel Ni/Al2O3-P catalyst for CO2 methanation was prepared via an oxygen plasma decomposition of the [email protected]2O3 core–shell precursor. The obtained catalyst showed a higher Ni dispersion (26.5%) and contained less NiAl2O4 spinel when compared with the Ni/Al2O3 prepared by the traditional method. The Ni/Al2O3-P catalyst showed significantly enhanced efficiency toward CO2 methanation as compared with those catalysts with a similar nickel loading but are prepared using the traditional method. For example, the space time yield of methane (STYCH4) of the Ni/Al2O3-P catalyst was as high as 21103.6 mg∙gNi-1∙h−1 at 400 °C and GHSV as 12000 ml∙g−1∙h−1, which is 3.4 times higher than that of the reported catalyst (6190.5 mg∙gNi-1∙h−1) with a similar nickel loading under similar reaction conditions. Moreover, Density Functional Theory (DFT) studies together with the CO2-TPD results revealed that both nickel surface and Ni-Al2O3 interface could activate CO2, while the NiAl2O4 surface could not.
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