Efficient CO2 Desorption Catalysts: from Material Design to Kinetics Analysis and Application Evaluation
Lei Xing, Zhen Chen, Guoxiong Zhan, Zhoulan Huang, Lidong Wang, Junhua Li
Abstract
Catalytic amine-solvent regeneration has been validated as an energy-saving strategy for CO 2 chemisorption by boosting reaction kinetics under mild conditions. The upscale performance evaluation and long-term durability are indispensable steps for industrial application but have been scarcely reported thus far. Here, we report a ZrO 2 /Al 2 O 3 pack catalyst that possesses strong metal oxide-support interactions, a porous structure, active and stable Zr–O–Al coordination, promoted proton transfer and a 40.7% decrease in the energy activation of carbamate decomposition, which significantly accelerates CO 2 desorption kinetics. The upscale experiment and cost evaluation based on industrial flue gas revealed that the use of packing catalysts can reduce energy consumption by 27.56% and optimize the overall cost by 10.49%. The active sites present excellent stability in alkaline solvents. This work is the first to investigate the ability of high-technology readiness (technology readiness level at 6 (TRL 6)) for catalytic amine-solvent regeneration, providing valuable insights for potential applications involving efficient CO 2 capture with catalyst assistance.