Erfaneh Dinashi - Amirkabir University of Technology Mahshahr Campus, Mahshahr, Iran
Mohammad Rahmani - Amirkabir University of Technology Mahshahr Campus, Mahshahr, Iran Chemical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
Mohammadreza Parvizi - Research and Development Center, Bou Ali Sina Petrochemical Co., Mahshahr, Iran
Sajjad Habibzadeh - Chemical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran

The coke combustion on the spent catalyst for naphtha reforming from an industrial plant has been studied by the thermogravimetry and differential thermogravimetry (TG-DTG) techniques. The results showed that only one type of coke existed on the catalyst surface. It has been proved that, the coke combusion occurred at 480°C for this catalyst. The comustion rtae studied for different partial pressure of oxygen in the feed to TG-DTG instrument. It was shown that the oxygen contents above 18% mol in the feed has no or little effect on the coke comustion rate.The results of this work can be used to understand the decoking process of CCR units.

Decoking, Naphtha Reforming, Coke Combustion.