Iranian Journal of Oil and Gas Science and Technology
Quarterly Publication

Development of New Potassium Carbonate Sorbent for CO2 Capture under Real Flue Gas Conditions

Document Type : Research Paper

Authors

Javad Esmaili
Mohammad Reza Ehsani

Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran

https://doi.org/10.22050/ijogst.2014.6620
Abstract
In this paper, the development of a new potassium carbonateon alumina support sorbent prepared by impregnating K2CO3 with an industrial grade of Al2O3 support was investigated. The CO2 capture capacity was measured using real flue gas with 8% CO2 and 12% H2O in a fixed-bed reactor at a temperature of 65 °C using breakthrough curves. The developed sorbent showed an adsorption capacity of 66.2 mgCO2/(gr sorbent). The stability of sorbent capture capacity was higher than the reference sorbent. The SO2 impurity decreased sorbent capacity about 10%. The free carbon had a small effect on sorbent capacity after 5 cycles. After 5 cycles of adsorption and regeneration, the changes in the pore volume and surface area were 0.020 cm3/gr and 5.5 m2/gr respectively. Small changes occurred in the pore size distribution and surface area of sorbent after 5 cycles.

Keywords

Flue gas
CO2 capture
K2CO3/Al2O3
Solid Sorbent

  • Receive Date 18 May 2013
  • Revise Date 20 May 2014
  • Accept Date 14 June 2014

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