Introduction of ICCU-methanation

https://doi.org/10.1016/j.fuel.2022.123420

“Recently, integrated CO₂ capture and utilization (ICCU) using dual-functional combined materials is gaining increasing interest by combining CO₂ adsorption and utilization in a single reaction system [10], [11], [12]. ICCU is a gas-swing two-stage system, as shown in Fig. 1. The 1st stage is the CO₂ capture from the diluted CO₂ exhaust gas, and the 2nd stage is CO₂ conversion accompanied by the recovery of adsorbents. It is suggested that ICCU has lower energy consumption benefited from the isothermal operating condition and less capital investment on the process units compared with conventional CCU [13]. The key point is that ICCU avoids CO₂ enrichment and transportation steps by in situ converting the fixed CO₂, thus greatly reducing the cost of CCU.”

“Fig. 1. Schematic diagram of integrated CO₂ capture and methanation process.”