Formulation of CO2 Sorption/Release Behaviors Using Alkali Carbonate-on-Activated Carbon

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Naoya Shigemoto¹  Tetsu Yanagihara¹ 

[1] Department of Chemical and Biological Technologies, Shikoku Research Institute, Inc.

关键词: Alkali Carbonate;    Alkali Hydrogencarbonate;    CO2 Recovery;    Activated Carbon;    Gas Solid Equilibrium;   

DOI  :  10.1252/jcej.16we031

来源: Maruzen Company Ltd

【 摘 要 】

References(15)Alkali carbonates supported on activated carbon (AC) for CO2 sorption from moist flue gases by a temperature-swing operation have been proposed. The temperature dependence of CO2 uptake by the sorbent was investigated to understand the CO2 sorption/release behavior. The CO2 sorption behaviors of alkali carbonates-on-AC at various temperatures were well explained based on CO2 gas-sorbent equilibria. However, the reverse reaction of thermal decomposition of alkali hydrogencarbonates, which were the reaction products after CO2 sorption, did not explain the sorption behaviors. The CO2 gas-sorbent equilibrium constants were used to determine the effect of CO2 partial pressure in the feed gas on the CO2 sorption capacities. The results showed that the pressure-swing operation was appropriate for sorption using alkali carbonates-on-AC. At low CO2 partial pressures in the feed gas, the CO2 sorption capacities achieved using alkali carbonates-on-AC were higher than that achieved using K2CO3 solution (i.e., the Benfield process).

【 授权许可】

Unknown