摘要
在“壳层中毒机理”的基础上,讨论了表面失活对SO_2氧化宏观反应速率的影响,并将这种影响归并于内表面利用率之中。建立了整个颗粒内表面利用率的数学模型,对三种常用的操作条件进行计算。发现随着中毒程度的增加,内表面利用率下降得很快;因中毒而造成的有效体积的下降对内表面利用率下降的影响较大。
The effect of surface deactivation of vanadium catalyst on macro reaction rate of SO2 oxidation to SO3 is discussed on the basis of the shell poison mechanism and is attributed to the variation of internal surface utilization factor of catalyst. A mathematical model for calculating the internal surface utilization factor of a whole particle of catalyst under deactivating conditions was developed and used for 3 cases with normal operation conditions. The results showed that the internal surface utilization factor decreased steeply with increasing poisoned shell depth and the decreace in effective volume of catalyst because of poisoning played a major role in lower utilization factor.
出处
《硫酸工业》
CAS
1993年第2期3-8,60,共6页
Sulphuric Acid Industry
