1. Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education School of Chemistry and Chemical Engineering Henan Normal University Xinxiang Henan 453007 P. R. China
2. State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of Technology Taiyuan Shanxi 030024 P. R. China
3. School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control Ministry of Education Henan Normal University Xinxiang Henan 453007 P. R. China
4. College of Engineering and Physical Sciences, and School of Energy Resources University of Wyoming Laramie WY 82071 USA