1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, P. R. China
2. Daqing Chemical Research Center, Petrochemical Research Institute, PetroChina Company Limited, Heilongjiang, Daqing 163714, P. R. China
3. Institute of Shaoxing Tianjin University, Zhejiang 312300, P. R. China