1. School of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510641 China
2. Bio‐Oils Research Unit, National Center for Agricultural Utilization Research, Agricultural Research ServiceUnited States Department of Agriculture Peoria IL 61604 USA
3. Sustainable Biofuels and Co‐products Research Unit, Eastern Regional Research Center, Agricultural Research ServiceUnited States Department of Agriculture Wyndmoor PA 19038 USA