1. School of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, China
2. Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy, Xi'an, Shaanxi 710069, China
3. International Science & Technology Cooperation Base of MOST for Clean Utilization of Hydrocarbon Resources, Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi, Xi'an, Shaanxi 710069, China