TiO(OH) - highly effective catalysts for optimizing CO desorption kinetics reducing CO capture cost: A new pathway.

The objective is to find a new pathway for significant reduction in CO capture energy consumption. Specifically, nanoporous TiO(OH) was used to realize the objective, which was desired as a catalyst to significantly accelerate the decomposition of aqueous NaHCO, essentially CO desorption - the key step of NaCO/NaHCO based CO capture technologies from overall CO energy consumption perspective. Effects of several important factors on TiO(OH)-catalyzed NaHCO decomposition were investigated. The quantity of CO generated from 0.238 mol/L NaHCO at 65 °C with catalyst is ~800% of that generated without the presence of catalyst. When a 12 W vacuum pump was used for carrying the generated CO out of reactor, the total amount of CO released was improved by ~2,500% under the given experimental conditions. No significant decrease in the catalytic effect of TiO(OH) was observed after five cyclic CO activated tests. In addition, characterizations with in-situ Fourier transform infrared spectroscopy, thermal gravity analysis and Brunauer-Emmett-Teller of TiO(OH) indicate that TiO(OH) is quite stable. The discovery in this research could inspire scientists' interests in starting to focus on a new pathway instead of making huge effort or investment in designing high-capacity but expensive CO sorbent for developing practical or cost-effective CO technologies.