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

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Implementing Paris Climate Accord is inhibited by the high energy consumption of the state-of-the-art CO2 capture technologies due to the notoriously slow kinetics in CO2 desorption step of CO2 capture. To address the challenge, here we report that nanostructured TiO(OH)2 as a catalyst is capable of drastically increasing the rates of CO2 desorption from spent monoethanolamine (MEA) by over 4500%. This discovery makes CO2 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 CO2 sorption and sorption. A possible mechanism is proposed for the TiO(OH)2-catalyzed CO2 capture. TiO(OH)2 could be a key to the future success of Paris Climat e Accord.

Original languageEnglish (US)
Article number2672
JournalNature communications
Volume9
Issue number1
DOIs
StatePublished - Dec 1 2018

Bibliographical note

Funding Information:
We acknowledge the supports from Department of Energy (Award No.DE-PI0000017) and National Science Foundation (NSF OIA-1632899). We especially thank Bo Fan for his significant contribution to the initial invention of the reported CO2 capture technology.

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