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.
Highlights
Implementing Paris Climate Accord is inhibited by the high energy consumption of the stateof-the-art CO2 capture technologies due to the notoriously slow kinetics in CO2 desorption step of CO2 capture
Cause of the increasCO2 emission control is imperative by the Paris Climate Accord[5,6]
The CO2 desorption step in conventional CO2 capture technologies has to be operated at higher temperatures for achieving higher reaction kinetics, typically above 100 °C, which makes this step very expensive, primarily due to the high specific and latent heat capacities of water[10]
Summary
Catalytic effect of TiO(OH)[2] on CO2 absorption and desorption. The catalytic effect of TiO(OH)[2] on CO2 absorption, sorption for short, and desorption using MEA solution as an example is examined in this work with a setup shown in a 1.0 b 350 c 0.25.
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