A novel cadmium mixed metal oxide system is under investigation for its CO2 adsorption capability at temperatures between 250 and 300 �C. It exhibits almost stoichiometric sorption capacity of around 20 weight% and fast uptake kinetics. Powder X-ray diffraction confirmed cadmium carbonate formation from oxide during adsorption. The CO2 adsorption and desorption behavior of these materials was analyzed by thermogravimetric analysis (TGA) in 25 cycles.  During early experiments a substantial loss of CO2 capacity was observed over successive cycles. This loss of capacity could be substantially controlled by varying the pre-treatment conditions. Materials activated in the preferred manner exhibit higher working capacity and better stability in wet gas (1 % H2O) compared to dry gas. The mechanisms which control this behavior are the focus of ongoing studies.

Cadmium based metal oxide sorbents for pre-combustion CO<sub>2</sub> capture

245th National Meeting (2013)

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Cadmium based metal oxide sorbents for pre-combustion CO2 capture

Cadmium based metal oxide sorbents for pre-combustion CO₂ capture