Thermocatalytic analysis of CO2-CO selective chemisorption mechanism on lithium cuprate (Li2CuO2) and oxygen addition effect

摘要: Abstract In the present work, thermogravimetric and catalytic analyses were performed in order to evidence chemisorption selective mechanism followed during CO CO2 processes on Li2CuO2 under different atmosphere conditions. Results contrasted with some thermodynamic data. According TG results, when gas flow was composed by one (CO or CO2), occurred through a superficial reaction volumetric capture. case, double process produced; oxidation subsequent chemisorption. Here, Li2CuO2, initially, catalyzed then it sorbed CO2. However, as structure composition evolves, could not be strictly considered catalyst. On other hand, both gases (CO-CO2), competition observed function of temperature, where always selectively chemisorbed. Furthermore, O2 presence modified positively abilities binary (CO-O2 CO2-O2) ternary (CO-CO2-O2) systems, comparison analogous tests absence O2.