Development of low-cost amine-enriched solid sorbent for CO₂ capture

Abstract

CO₂ capture amine-enriched solid sorbent using agricultural wastes, such as bagasse, or industrial wastes, such as mullite, as support materials could provide efficient alternative CO₂ reduction due to their low cost and ability to shape into many forms. These amine-enriched solid sorbents were prepared by treatment with monoethanolamine (MEA), diethanolamine, piperazine (PZ), 2-(2-aminoethyl-amino) ethanol (AEEA) and mixtures of these amines. The performance of amine-enriched solid sorbents with various amine compositions was studied in a tubular column at 1 atm and an adsorption temperature of 303 K. The CO₂ capture capacities of the amine-enriched solid sorbents were determined by gas chromatography at a desorption temperature of 393 K. Amine-enriched solid sorbents in this study exhibited high performance CO₂ capture. The MEA-PZ-enriched solid sorbent does have the highest CO₂ capture performance of the amine-enriched bagasse support-based sorbents, and the results indicate that PZ is the most effective promoter in this study. The CO₂ capture performances of solid sorbents in this study were compared with commercial solid sorbents. This study could lead to the development of low-cost solid sorbents for CO₂ capture that can be used in many industrial applications.

Keywords:

• carbon dioxide reduction
• adsorption
• amine-enriched solid sorbent
• mixed amines
• piperazine and 2-(2-aminoethyl-amino) ethanol promotion

Acknowledgement

This work was supported by the National Research University Project of the Thailand Office of Higher Education Commission.