CO Chemical Capture on Lithium Cuprate, Through a Consecutive CO Oxidation and Chemisorption Bifunctional Process

Lithium cuprate was studied as a possible catalytic and captor material for CO oxidation and the subsequent CO 2 chemisorption process, a bifunctional material. The CO oxidation reaction was analyzed in a high temperature reactor coupled to an FTIR spectrometer and a gas chromatograph. The CO 2 production and consequent chemisorption processes were analyzed by thermogravimetric analysis. All of these experiments were performed in both the presence and absence of oxygen. Experimental results were then compared with theoretical thermodynamic data. The results clearly showed that Li 2 CuO 2 can be used as a bifunctional material; it is able to catalyze the CO oxidation, producing CO 2, and, subsequently, it can chemically capture the CO 2 . Both processes occur in the presence or absence of oxygen and follow the Mars–van Krevelen reaction mechanism.