سال انتشار: ۱۳۸۲

محل انتشار: هشتمین کنگره ملی مهندسی شیمی ایران

تعداد صفحات: ۶

نویسنده(ها):

Sattar Ghader – Chemical Engineering Department , Tarbiat Modares University , Tehran, Iran
Mehrdad Manteghian – Chemical Engineering Department , Tarbiat Modares University , Tehran, Iran
Mohammad Reza Rahimpour – Chemical Engineering Department , Shiraz University , Shiraz, Iran
Jamshid Fathi – Chemical Engineering Department , Shiraz University , Shiraz, Iran

چکیده:

The size of methanol synthersis catalysis is usually 4-6 mm and intra – particle diffusion limitation are important in them. In this study we use dustry gas model (DGM) to describe effectiveness factor in the catalyst. The results show that neglecting Knudsen diffusionin DGM ends in wrong effectiveness factors, i.e.Knudsen diffusion is more important that bulk diffusion in catalyst. DGM was utilized to determine concentration profile of reactants and products within the catalyst. The results show that mole fraction of methanol and water increase in catalyst so that they approach to equilibrium valueat centerof catalyst.