The Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO₂ Capture and Hydrogenation.

ABSTRACT: Ni/CaO, a low-cost dual-functional material (DFM), has been widely studied for integrated CO₂ capture and hydrogenation. The core of this dual-functional material should possess both good CO₂ capture-conversion performance and structural stability. Here, we synthesized Ni/CaO DFMs modified with alkali metals (Na, K, and Li) through a combination of precipitation and combustion methods. It was found that Na-modified Ni/CaO (Na-Ni/CaO) DFM offered stable CO₂ capture-conversion activity over 20 cycles, with a high CO₂ capture capacity of 10.8 mmol/g and a high CO₂ conversion rate of 60.5% at the same temperature of 650 °C. The enhanced CO₂ capture capacity was attributed to the improved surface basicity of Na-Ni/CaO. In additio

SUBMITTER: Hu Y 

PROVIDER: S-EPMC10420131 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature