Kinetic study of CO2 reaction with CaO by a modified random pore model

Polish Journal of Chemical Technology

Ale Ebrahim H.¹  Nouri S.M.M.² 

[1] Amirkabir University of Technology, Chemical Engineering Department, Petrochemical Centre of Excellency, Tehran, 15875-4413, Iran;Hakim Sabzevari University, Chemical Engineering Department, Sabzevar, 9617976487, Iran;

关键词: carbonation reaction;    calcium oxide;    mathematical modeling;    random pore model;    pore size distribution;   

DOI  :  10.1515/pjct-2016-0014

来源: DOAJ

【 摘 要 】

In this work, a modified random pore model was developed to study the kinetics of the carbonation reaction of CaO. Pore size distributions of the CaO pellets were measured by nitrogen adsorption and mercury porosimetry methods. The experiments were carried out in a thermogravimeter at different isothermal temperatures and CO2 partial pressures. A fractional concentration dependency function showed the best accuracy for predicting the intrinsic rate of reaction. The activation energy was determined as 11 kcal/mole between 550–700°C. The effect of product layer formation was also taken into account by using the variable product layer diffusivity. Also, the model was successfully predicted the natural lime carbonation reaction data extracted from the literature.

【 授权许可】

Unknown