Heat of Absorption of CO2 in Novel Energy Reducing Solvents for Biogas Upgrading

Abstract

Biogas upgrading is done for the removal of CO2 to produce clean bio-methane. CO2 capture is a method that can accomplish this task. This project focuses on the chemical absorption process using amine as a baseline. The energy required for CO2 capture can be optimized by the use of new additives termed vapour reduction additives (VRAs). The heat of absorption of CO2 in aqueous solutions of (30wt%) monoethanolamine (MEA) and (7.5wt% and 30wt%) VRAs have been measured at two temperatures (313K and 393K) at a pressure of 250 psi. The measurements were conducted by a SETARAM C80 calorimeter consisting of a flow-mixing cell. The enthalpies of mixing of CO2 in the solvents have been obtained as a function of loading α (mol CO2/mol MEA).