Volume 9: Sustainable Energy Solutions for Changing the World: Part I

Numerical investigation on adsorption chamber with internal heat exchanger for temperatue swing CO2 adsorption Lijin Chen, Shuai Deng, Ruikai Zhao, Li Zhao

Abstract

In order to enhance heat and mass exchange, the internal heat exchanger is introduced into the adsorption chamber based on the temperature swing adsorption (TSA) process. Heating is carried out by condensing steam, and cooling by water circulation. The influence of the number of internal heat exchangers, inlet speed and porosity on the CO2 purity, recovery rate, energy consumption and COPCO2 are discussed numerically to improve the energy efficiency performance of TSA process. The results show that under the same operating conditions, the CO2 purity, recovery rate and COPCO2 of the three-tube heat exchanger in adsorption chamber are higher than that of the one-tube heat exchanger, with lower energy consumption of three-tube heat exchanger. The temperature distribution of the adsorption chamber is greatly influenced by the inlet speed and porosity. By increasing inlet speed or porosity, the CO2 purity, recovery rate and COPCO2 can be improved and energy consumption can be reduced. The obtained simulation results can provide further guidance for engineering design.

Keywords Temperature swing adsorption, adsorption chamber, heat exchanger, numerical simulation and optimization