Process, performance and modeling of CO2 capture by chemical absorption using high gravity: A review

Anthropogenic CO2 emissions have become an important issue in related to energy, economy and the environment. To maintain CO2 at controllable levels, emission reductions are urgently required. One way of accomplishing this may be via CO2 capture and separation. As a kind of extreme physical condition, high gravity with rotating packed bed (RPB) technology is considered to be a high-efficiency chemical method for CO2 capture. This article reviews the process, performance, and modeling of CO2 capture with high gravity, focusing on (1) mechanisms of gas-liquid process intensification, (2) CO2 capture performance characteristics, (3) CO2 capture efficiency responses to influencing factors including: hypergravity factor, absorbent and CO2 concentrations, gas-liquid ratio, and the reaction temperature/pressure; and finally (4) CO2 capture performance modeling and analysis related to pressure drop and mass transfer. Future directions are also prospected for fundamental research and development of CO2 capture with high gravity.