日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

Solid sorbents are composed of amine absorbents for chemical absorption and porous materials. They have similar CO₂ adsorption characters with liquid amine absorbents. Furthermore, they make it possible to significantly reduce the energy consumed as sensible heat and evaporative latent heat in the regeneration process. We investigated the relationship between amine molecular structure and CO₂ desorption performance, and successfully fabricated innovative, high-performance solid sorbents capable of low-temperature regeneration and having high adsorption capacities. The lab scale tests were conducted by using steam-aided vacuum swing adsorption (SA-VSA) process, in which steam were supplied in desorption process. After the cycle time was optimized, the result showed that RITE solid sorbents can capture high-purity (99%) CO₂ from a simulated flue gas (12% CO₂) in high yields (90%), demonstrating that RITE’s solid sorbents have superior performance in CO₂ capture. Currently, bench scale test is underway by moving bed system in cooperation with Kawasaki Heavy Industries, Ltd. with the aim of commercialization, and succeeded in CO₂ capture on a 7 t/day scale.