Silica-Decorated NiAl-Layered Double Oxide for Enhanced CO/CO2 Methanation Performance

Wenxia Yan; Yangyang Li; Junming Zeng; Wentao Bao; Huanhuan Zhao; Jiangbing Li; Poernomo Gunawan; Feng Yu

doi:10.3390/nano12173041

Silica-Decorated NiAl-Layered Double Oxide for Enhanced CO/CO₂ Methanation Performance

Nanomaterials (Basel). 2022 Sep 1;12(17):3041. doi: 10.3390/nano12173041.

Authors

Wenxia Yan¹, Yangyang Li¹, Junming Zeng¹, Wentao Bao¹, Huanhuan Zhao¹, Jiangbing Li¹, Poernomo Gunawan², Feng Yu^{1

3}

Affiliations

¹ Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
² School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore.
³ Carbon Neutralization and Environmental Catalytic Technology Laboratory, Bingtuan Industrial Technology Research Institute, Shihezi University, Shihezi 832003, China.

Abstract

CO/CO₂ hydrogenation has attracted much attention as a pathway to achieve carbon neutrality and production of synthetic natural gas (SNG). In this work, two-dimensional NiAl layered double oxide (2D NiAl-LDO) has been successfully decorated by SiO₂ nanoparticles derived from SiCl₄ and used as CO/CO₂ methanation catalysts. The as-obtained H-SiO₂-NiAl-LDO exhibited a large specific surface area of 201 m²/g as well as high ratio of metallic Ni⁰ species and surface adsorption oxygen that were beneficial for low-temperature methanation of CO/CO₂. The conversion of CO methanation was 99% at 400 °C, and that of CO₂ was 90% at 350 °C. At 250 °C, the CO methanation reached 85% whereas that of CO₂ reached 23% at 200 °C. We believe that this provides a simple method to improve the methanation performance of CO and CO₂ and a strategy for the modification of other similar catalysts.

Keywords: CO/CO2 methanation; carbon neutrality; layered double oxide; synthetic natural gas; two-dimensional material.

Abstract

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