摘要
用外循环无梯度反应器研究了甲醇氧化制甲醛的动力学。动力学实验结果用二步骤Redox模型描述。动力学方程中的参数用线性最小二乘法估计。甲醇的反应级数m和氧的反应级数n与温度有关,m与n的和接近于1,反应级数的变化可用Redox机理动力学解释。不同处理催化剂的XPS分析结果证实,反应按Redox机理进行。
The kinetics of oxidation of methanol to formaldehyde on Mo-Bi-Ce/SiO_2 catalyst has been investigated in an external recirculation gradientless reactor. The kinetic data can be described by a two-stage redox model. The parameters of the kinetic equation were estimated by the linear least square method. The m-order with respect to methanol and n-order with respect to oxygen depended on the reaction temperature and m+n=1 (the sum of m and n is close to 1). The change of reaction order was interpreted by the kinetics of redox mechanism. XPS results Which come from different treated catalysts verify the redox mechanism mentioned above.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1989年第6期699-704,共6页
Acta Physico-Chimica Sinica
基金
北京大学结构化学开放研究实验室课题
