Ramin Karimzadeh - Chemical Engineering Department, Tarbiat Modares University ,Po.Box. ۱۴۱۱۵-۱۱۱ , Tehran, Iran
Jafar Towfighi - Chemical Engineering Department, Tarbiat Modares University ,Po.Box. ۱۴۱۱۵-۱۱۱ , Tehran, Iran
Heinz Zimmermann - LINDE AG, Process Engineering and Contracting Division, Dr. Carl-von-Linde-Str. ۶-۱۴ ,D- ۸۲۰۴۹ Hoellriegelskreuth , Germany

The yields of light products of steam cracking of naphtha have been increased through a tube with ceramic packing . The use of packed bed reactors in commercial scale has pressure drop limitation. A reactor consisting of a coil with ceramic tube rod inside the coil is a good substituting of ceramic packed bed reactor. Steam cracking of naphtha in industrial reactor of Arak petrochemical complex is simulated for two different cases of the steam cracking reactors. In the first case, the existing reactor in the Arak petrochemical plant with known operating conditions was simulated. In the second case, a reactor with a ceramic rod at operating conditions in Arak reactor was simulated. The results show that the skin temperature of the coil with ceramic rod is lower than the skin temperature of empty tube for given gas temperatures. It is also shown that the yield of ethylene in a reactor with the ceramic rod is higher that the yield in empty reactor for a given gas outlet temperature.

Steam Cracking, Ceramic rod, Naphtha, Modeling, Ethylene