A review of the hydrate based gas separation (HBGS) process for carbon dioxide pre-combustion capture
Hydrate based gas separation (HBGS) process has been considered as a promising new/novel approach for CO2 separation from fuel and flue gas mixtures. The basis for separation is the selective partition of the CO2 component of a fuel or flue gas mixture between the solid hydrate crystal phase and the gaseous phase upon hydrate crystal formation. The advantages of employing the HBGS process for CO2 capture are the high storage capacity, energy efficiency, clean process (it does not use toxic or hazardous materials) and environmentally benign (use of water as a solvent) process. Another advantage of the HBGS process is that it can simultaneously capture H2S and SO2, thus eliminating the need to have pre-treatment steps for pre-combustion capture. In this work a systematic analysis of important parameters like gas uptake capacity, the rate of hydrate formation, separation efficiency (CO2 recovery and separation factor) of the HBGS process in the presence of different promoters and different reactor configurations is presented. A comprehensive assessment based on thermodynamic, kinetic parameters and cost estimation of the HBGS process is provided. Finally, future prospects and directions to commercialize the HBGS process are presented.
Schematic of the hydrate based gas separation process for capture of CO2.
This work has been published in Energy on June 1, 2015 (doi:10.1016/j.energy.2015.03.103)
Corresponding author(s): Praveen Linga (
Corresponding author(s) webpage: http://cheed.nus.edu.sg/~chepl/index.html