补偿效应在合成气转化反应中的存在和验证

Observation and evidence of compensation effect in syngas conversion reaction

于钴系催化剂上进行合成气转化反应,并用线性回归拟合的方法求出一系列CO转化的活化能(E_(co))和频率因子(A_c)数据,发现lnA_c和E_(co)之间存在着线性关系(相关系数为0.977),证明在合成气转化反应中存在着补偿效应(compensation effects),其数学表达式可归结为:lnA_c=0.27E_(co)-8.7。由本实验得到的等动力学温度(isokinetic temperature)为172℃,该数值与文献报导的在第Ⅷ族过渡金属上所得到的数值相近。

A series data of activation energy (E_(co)) and frequency factor (Ac) for CO conversion reaction were obtained by the linear regression fit method for syngas conversion reaction over supported-cobalt catlysts.It was found that there was a linear correlation between InAc and E_(co)(the correlation coefficient is equal to 0.977).A compensation effect in the syngas conversion reaction was observed and its mathematical expression can be considered as InAc= 0.27E_(co)-8.7.A value of the isokinetic temperature of 172℃ was obtained and it was nearly the same as the value on the Ⅷ transition metals as reported in the literature.