Adsorption Characteristic of Carbon Dioxide on Activated Carbon Impregnated with Piperazine

Abstract

Functionalized adsorbent has been synthesized by piperazine(Pz) on activated carbon. Quantitative estimations of CO2 were undertaken using gas chromatography with GC/TCD and the prepared adsorbents were characterized by BET surface area and FT-IR. It was also studied effect of various parameters such as piperazine loadings and adsorption temperature. The specific surface area decreased from 1212. (50)-AC at 50∼100℃. Therefore, for high temperature flue gas condition, the Pz(10)-AC showed the highest adsorption capacity due to physical adsorption and chemical adsorption by amino-group content. The results suggest that activated carbon impregnated with Pz is an effective adsorbent for CO2 capture from real flue gases above 50℃.