http://reply.papertrans.cn/1/53/5273/5273-31.png
http://reply.papertrans.cn/1/53/5273/5273-32.png
http://reply.papertrans.cn/1/53/5273/5273-33.png
Submitted on: 03 November 2006.
Revised on: 07 February 2007.
Accepted on: 09 March 2007.
___________________China Petroleum Processing & Petrochemical Technology
http://reply.papertrans.cn/1/53/5273/5273-35.png
http://reply.papertrans.cn/1/53/5273/5273-36.png