1. Center for Alternative Fuels Engines and Emissions (CAFEE), Mechanical and Aerospace Engineering Department, West Virginia University , Morgantown, WV 26506
2. Center for Alternative Fuels Engines and Emissions (CAFEE), Mechanical and Aerospace Engineering Department, West Virginia University , Morgantown, WV 26506 ; , Morgantown, WV 26506
3. Center for Innovation in Gas Research and Utilization (CIGRU), West Virginia University , Morgantown, WV 26506 ; , Morgantown, WV 26506