Utilizing zeolitic imidazolate framework-8 for enhanced carbon dioxide/methane separation and improved carbon dioxide methanation performance.

Zeolitic imidazolate framework-8 (ZIF-8) has been widely employed for carbon dioxide (CO) and methane (CH) separation, and CO adsorption and storage owing to its high porosity and tunable pore structure. However, its potential to enhance CO-to-CH conversion by grasping CO in hydrogenotrophic methanogenic systems, thereby increasing CH percentage in biogas, remains unexplored. This study synthesized ZIF-8 material and applied it in a biological biogas upgrading system.