1. Department of Chemical and Biomolecular Engineering, University of Pennsylvania, 311A Towne Building, 220 South 33rd Street, Philadelphia, Pennsylvania 19104; Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum (Beijing), Beijing 10224, China; and Department of Mechanical Engineering, Tokyo University of Science, Hongo, Bunkyo-Ku, Tokyo 113-8656, Japan