1. State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, China National Petroleum Corp. (CNPC)China University of Petroleum (East China) Qingdao 266555 P.R. China
2. College of ScienceChina University of Petroleum (East China) Qingdao 266580 P.R. China
3. Laboratoire Catalyse et Spectrochimie (LCS), ENSICAEN, UNICAEN, CNRSNormandie Université 6 boulevard du Marechal Juin 14050 Caen France