Kinetics characteristics and efficiency of carbon dioxide absorption from biogas by dolomite suspensions

Abstract

Apparent kinetic parameters of carbon dioxide sorption from biogas using solutions produced by suspending calcined dolomite are given. The optimum and effective CO2 absorption temperature is 20°C. Kinetic calculations show that the apparent absorption order and the apparent absorption rate constant decrease with a rise of temperature. It is shown that the CO2 absorption rate is a direct function of CO2 partial pressure and an inverse function of temperature. A dolomite solution obtained by filtration of a 1% dolomite suspension in water is recommended for CO2 absorption.