1. Advanced Fuels Center, Montana State University-Northern, 300 West 11th Street, Havre, Montana 59501, United States
2. Department of Civil & Environmental Engineering, Old Dominion University, Norfolk, Virginia 23529, United States
3. Department of Biological and Agricultural Engineering, Texas A&M University, College Station, Texas 77843, United States
4. U.S. Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Bio-Oils Research Unit, Peoria, Illinois 61604, United States