Mo-Ce/SiO_2催化剂上甲醇氧化制甲醛的催化剂的有效因子及甲醇的压力分布

The Effectiveness Factor of Catalyst and Pressure Profile of Methanol for Oxidation of Methanol to Formaldehyde over Mo-Ce/SiO_2 Catalyst

在Mo-Ce/SiO_2催化剂上甲醇氧化制甲醛的动力学方程可表达为甲醇及甲醛吸附的Redox机理方程,当催化剂颗粒直径增大到3mm时,内扩散强烈地影响反应速度。催化剂有效因子η可用一般速度方程的近似方法进行解释。催化剂孔内甲醇的压力分布可用下式求得:

The kinetics of oxidation of methanol to formaldehyde over Mo-Ce/SiO2 catalyst might be described by the equation of Redox mechanism with adsorption of methanol and.formaldehyde. When the particle size of catalyst reached 3 mm in diameter, intraparticle diffusion affected the reaction rate strongly. The effectiveness factors of catalyst were determined by experiments and interpreted by the approximation method of general rate equation. .The pressure of methanol in catalyst pore might be obtained by equation