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MoBiP_(1∶8)/SiO_2催化剂的X衍射实验证实存在BiPO_4物相,用吸附指示剂正丁胺滴定法测定了催化剂显中等强度酸性。催化剂上吸附吡啶的红外光谱实验证实催化剂存在质子酸和Lewis酸中心。用脉冲法测定了丁烯-1及丁烯-2的吸附热。用玻璃外循环无梯度反应器研究了MbBiP_(0.8)/SiO_2催化剂的丁烯-1异构化动力学。动力学方程服从丁烯异构化三角反应的L-H机理。用线性最小二乘法估计简化的L-H机理动力学方程中的参数,法方程的系数矩阵的条件数高达10~8。用正交设计法估计了丁烯-1异构化复杂反应动力学方程中的参数得到满意的结果。反-丁烯-2及顺-丁烯-2异构化生成速度分别为:
The XRD results of MoBiP_ (1: 8) / SiO_2 catalyst confirmed the existence of BiPO_4 phase, and the moderate acidity of the catalyst was measured by the adsorption indicator n-butylamine titration. FTIR spectra of pyridine adsorbed on the catalyst confirmed the presence of protonic acid and Lewis acid sites in the catalyst. Pulse heat method was used to determine the heat of butene-1 and butene-2 adsorption. The isobutylene-1 isomerization kinetics of MbBiP_ (0.8) / SiO_2 catalyst was investigated by a glass-free external loop gradientless reactor. The kinetic equation obeys the L-H mechanism of the isomerization reaction of butene. The linear least square method was used to estimate the parameters of the simplified L-H mechanism kinetic equation. The number of conditions of the coefficient matrix of the normal equation was as high as 10 ~ 8. The orthogonal design method was used to estimate the parameters in the kinetic equation of butylene-1 isomerization complex reaction. The formation rates of trans-butene-2 and cis-butene-2 isomerization were: