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

Author:

Yan Wenxia,Li Yangyang,Zeng Junming,Bao Wentao,Zhao Huanhuan,Li Jiangbing,Gunawan PoernomoORCID,Yu FengORCID

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.

Funder

National Natural Science Foundation of China

Program of Science and Technology Innovation Team in Bingtuan

Publisher

MDPI AG

Subject

General Materials Science,General Chemical Engineering

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