[期刊论文][Full-length article]

出版年：2019

Activated carbon was prepared from rice husk char by leaching with K₂CO₃ after CO₂ activation, and its CO₂ adsorption capacity, kinetics and regeneration were investigated. The results showed that the prepared activated carbon had a dual pore structure of micro-pores and meso-pores with specific surface area, micropore volume and mesopore volume of 1097 m²/g, 0.34 cm³/g and 0.49 cm³/g, respectively. The prepared activated carbon exhibited an excellent CO₂ adsorption capacity and a good CO₂ selectivity. The CO₂ uptake and selectivity were 3.1 mmol/g and 7.6 at 25 °C, respetively, which were comparable to those of activated carobns prepared by chemical activation using KOH as an activator. Besides, the prepared activated carbon showed a fast CO₂ adsorption kinetics and an excellent recyclability.

Rice husk char ; Activated carbon ; Adsorption ; Dual pore structure ; CO₂ capture