1. College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China
2. Oil and Gas Fire Protection Key Laboratory of Sichuan Province, Chengdu, Sichuan 611731, PR China
3. Southwest Petr Univ., State Key Lab Oil and Gas Reservoir Geol and Exploita, Chengdu, Sichuan 610500, PR China
4. Key Laboratory for Harmful Components and Tar Reduction in Cigarette of Sichuan Province, Chengdu, Sichuan 610100, PR China