Abstract: The global reaction rates for industrial high-temperature shift reaction catalyst WB-2 of size φ9 × 7 mm have been investigated in an internal recycle gradientless reactor at pressures of 7 × 105 Pa (gauge) and 13 × 105 Pa(gauge). The pore-size distribution and the tortuosity factor of the catalyst have been measured. In this part, by using the intrinsic kinetic equation obtained at atmospheric pressure, the numerical solutions of the global rates have been computed according to the simplified multicomponent diffusion model presented in the second part of this paper, and have been compared with the experimentally observed values. The average absolute deviations between the calculated effectiveness factors by, the simplified multicompohent modeland thekey-component model, and the experimental values, are 11.72% and 11.88%, respectively. Therefore, the results of comparison are satisfaetory. It is proposed therefrom in this part, that the experiments of global rates under pressure are not necessary to investigate kinetic behavior under pressure for reactions for which operating pressures are not high such as the high-temperature shift reaction. The effectiveness factors and global reaction rates under pressure can be obtained by using the mathematical model of effectiveness factors presented in this paper on the basis of the intrinsic kinetic equation obtained at atmospheric pressure.

摘要： 在内循环无梯度反应器中研究37×10~5Pa(表)及13×10~5Pa(表)压力下工业粒度ф9×7mm.WB-2中温变换催化剂的宏观反应速率,测试了催化剂的孔径分布和曲节因子.本报应用常压下测得的本征动力学方程,对于十七组宏观实验速率,按照前报(Ⅱ)提出的简化多组分扩散模型,求取了效率因子的数值解,并与实验观察值作了比较.比较的结果令人满意.本报由此认为,对于中温变换这类压力不高的反应,研究其加压宏观动力学行为,不必进行加压宏观速率的实验测定.加压下的效率因子及宏观反应速率可在常压测得的本征动力学基础上借助本文提出的模型计算求得.