NON-EQUILIBRIUM DYNAMIC ADSORPTION AND DESORPTION ISOTHERMS OF CO2 ON A K-PROMOTED HTLC
A K-promoted HTlc was synthesized and tested for its reversible CO2 capacity between 250 and 500 ℃. Non-equilibrium dynamic adsorption and desorption isotherms were measured between 65 and 980 torr using 20 or 50 torr steps and a 45 min duration between steps. The absolute CO2 capacity on K-promoted HTlc increased with decreasing temperature, with CO2 loadings of 2.25 and 1.02 mol/kg respectively at 250 and 500 ℃ and 980 torr. The reversible CO2 working capacity obtained between 65 and 980 torr exhibited a maximum at 450 ℃, with a value of 0.55 mol/kg compared to 0.11 and 0.46 mol/kg at 250 and 500 ℃, respectively. It was surmised that three temperature dependent, highly coupled, completely reversible, equilibrium driven but kinetically limited reactions were taking place, with the first one being a rapid and reversible chemisorption of CO2 that initiated the entire process.
STEVEN P.REYNOLDS ARMIN D.EBNER JAMES A.RITTER
Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA
国际会议
天津
英文
221-227
2006-05-22（万方平台首次上网日期，不代表论文的发表时间）