1. State Key Laboratory of Biochemical Engineering; Institute of Process Engineering; Chinese Academy of Sciences; No. 1, Bei Er Tiao, Zhongguancun Beijing 100190 P. R. China
2. Department of Physical Chemistry; School of Metallurgical and Ecological Engineering; University of Science and Technology Beijing; No. 30, Xueyuan Road, Haidian District Beijing 100083 P. R. China