1. Department of Biological Systems Engineering, Washington State University, Pullman, Washington 99164, United States
2. Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
3. Renewable Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
4. College of Mechanical and Electrical Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China