关键词:

CO₂捕集, 吸附, 碳基吸附剂, 电解吸

Abstract:

In this paper，the feasibility and efficiency for capture of post-combustion CO₂ on carbonaceous materials by electrical swing adsorption (ESA) technology were evaluated experimentally.Carbonaceous materials made from various raw materials，such as coal，coconut shell，pitch，charcoal and polymer，and moulded into granular，porous，and fiber adsorbents were tested for capture of post-combustion CO₂ under the ambient pressure and temperature with a simulated flue gas composed of N₂ and CO₂. Several carbonaceous materials were evaluated and compared on the adsorption capacity and selectivity for CO₂，the electric and thermal conductivities，and the electric energy consumption at the direct-electrothermal desorption step.The experimental results demonstrated that the adsorbents could be regenerated quickly by direct heating the carbonaceous materials with electricity, and a lower power consumption was needed. The ESA process for CO₂ capture has significant advantages if the carbonaceous materials had a good CO₂ adsorption capacity by further modification.

Key words:

CO₂捕集, 吸附, 碳基吸附剂, 电解吸