1. Department of Chemical and Biological Engineering and Renewable and Sustainable Energy Institute (RASEI), University of Colorado Boulder, 4001 Discovery Drive, Boulder, Colorado 80303, United States
2. National Renewable Energy Laboratory, 15013 Denver W Parkway, Golden, Colorado 80401, United States
3. Shell International Exploration & Production Inc., 3333 Highway 6 South, Houston, Texas 77082, United States