@article{oai:kitami-it.repo.nii.ac.jp:00006595, author = {Yasuyuki, KONISHI and Toshio, KATAGIRI and Shichi, YASUI and Yoshinori, NAKANISHI and Tohru, KANNO and Masayoshi, KOBAYASHI}, issue = {1}, journal = {北見工業大学研究報告}, month = {Nov}, note = {application/pdf, The dynamic adsorption behavior of O_2, CO and CO_2 on MgO and MgCO_3 has been studied in detail at temperatures ranging from 150 to 171℃, by using the transient response method. 0n MgCO_3 no CO adsorbs and no CO oxidation proceeds. CO_2 is reversibly adsorbed obeying the Langmuir isotherm and the heat of adsorption is evaluated to be 2.7kcal/mol. On MgO, on the other hand, no CO adsorbs whereas the oxidation of CO easily proceeds and the rate equation is expressed : γ=kPco^<0.63>Po_2^<0.29> The apparent activation energy of reaction is estimated to be 14.6 kcal/mol. CO_2, adsorbs on the surface in both the reversible and irreversible forms. The reversibly adsorbed CO_2 has 4.3 kcal/mol of activation energy for adsorption and 13 kcal/mol for desorption. The irreversibly adsorbed CO_2 can partly desorb by elevating the temperature. A large part of the surface is covered with the strongly adsorbed CO_2, the surface coverage of which is 0.86. Only a small part of the active sites (θ=4.2×10^<-4>) is available for the adsorption of oxygen and one fifth of the amount is irreversible. The mode of the transient response curves obtained in the oxidation of CO indicates a typical monotone type suggesting that the reaction rate is controlled by the surface reaction and the desorptipon of CO_2.}, pages = {45--62}, title = {Transient Characterization of Carbon Monoxide, Carbon Dioxide and Oxygen Adsorbed on MgO and MgCO_3*}, volume = {18}, year = {1986} }