Catalyst-TiO(OH)2 could drastically reduce the energy consumption of CO2 capture
Qinghua Lai, Sam Toan, Mohammed A. Assiri, Huaigang Cheng, Armistead G. Russell, Hertanto Adidharma, Maciej Radosz, Maohong Fan
Abstract
Abstract Implementing Paris Climate Accord is inhibited by the high energy consumption of the state-of-the-art CO 2 capture technologies due to the notoriously slow kinetics in CO 2 desorption step of CO 2 capture. To address the challenge, here we report that nanostructured TiO(OH) 2 as a catalyst is capable of drastically increasing the rates of CO 2 desorption from spent monoethanolamine (MEA) by over 4500%. This discovery makes CO 2 capture successful at much lower temperatures, which not only dramatically reduces energy consumption but also amine losses and prevents emission of carcinogenic amine-decomposition byproducts. The catalytic effect of TiO(OH) 2 is observed with Raman characterization. The stabilities of the catalyst and MEA are confirmed with 50 cyclic CO 2 sorption and sorption. A possible mechanism is proposed for the TiO(OH) 2 -catalyzed CO 2 capture. TiO(OH) 2 could be a key to the future success of Paris Climat e Accord.