CO在Ag掺杂的氧化锰八面体分子筛上吸附的TAP研究

利用产物瞬时分析反应器中进行的单脉冲实验, 考察了393～493 K温度范围内CO在Ag掺杂的氧化锰八面体分子筛上的吸附行为. 实验表明: CO在催化剂表面发生化学吸附, 并与晶格氧反应生成CO₂. 通过对该过程反应物及产物脉冲响应曲线的模拟, 得到了各基元反应的动力学参数. CO和CO₂在该催化剂表面的脱附活化能分别为83和31 kJ/mol, CO与晶格氧的反应活化能为116 kJ/mol.

A TAP Study of CO Adsorption on Ag-Doped Manganese Oxide Octahedral Molecular Sieve

CO adsorption on Ag-doped manganese oxide octahedral molecular sieves (Ag/OMS-2) between 393 and 493 K was studied by single pulse experiments in a temporal analysis of products (TAP) reactor system. The results showed that CO was reversibly adsorbed on the surface of the catalyst and CO₂ was formed in an oxidation reaction of CO with lattice oxygen. The fitting of simulated curves to the experimentally observed response curves of the reactant and product was used to determine the kinetic parameters for the different elementary steps of the reaction. The activation energies were 83 kJ?mol^－1 for CO desorption and 31 kJ?mol^－1 for CO₂ desorption. The surface reaction activation energy for CO oxidation by lattice oxygen was 116 kJ/mol.