1. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
2. SEM Application Team, JEOL Ltd., Akisima, Tokyo 196-8558, Japan
3. Quantachrome Application Team, Anton Paar China, Shanghai 201103, China
4. State Key Laboratory of Heavy Oil Processing, the Key Laboratory of Catalysis of CNPC, College of Chemical Engineering, China University of Petroleum (Beijing), Beijing 102249, China
5. Normandie Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 6 Boulevard Maréchal Juin, 14050 Caen, France