Ultrasonic-vibration-assisted pelleting of switchgrass: Effects of ultrasonic vibration |
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| Authors: | CONG Weilong PEI Zhijian ZHANG Pengfei QIN Na DEINES T W LIN Bin |
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| Institution: | 1. Department of Industrial and Manufacturing Systems Engineering, Kansas State University,Manhattan, KS 66506, USA
2. Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education,Tianjin University, Tianjin 300072, China |
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| Abstract: | Biofuels produced from cellulosic biomass can be used to replace petroleum-based transportation fuels. However, the manufacturing
cost of cellulosic biofuels is still high, partly due to the low density of cellulosic feedstocks. Pelleting of cellulosic
feedstocks can increase their density, making their transportation and storage as well as biofuel conversion more efficient
and, therefore, reducing the overall cost of biofuel manufacturing. It has been shown that ultrasonic-vibration-assisted (UV-A)
pelleting, without using high-temperature steam and binder materials, can produce pellets with density comparable to that
produced by conventional pelleting methods. Furthermore, the sugar yield of biomass (wheat straw) processed with UV-A pelleting
is 20% higher than that of biomass pelleted without ultrasonic vibration. This paper reports an experimental investigation
of UV-A pelleting of switchgrass. The influences of ultrasonic vibration on pellet density, stability, durability, and pelleting
force are discussed. It is concluded that pellets processed with ultrasonic vibration had higher density and stability than
those processed without ultrasonic vibration, they were more durable than those processed without ultrasonic vibration, and
pelleting force with ultrasonic vibration was lower than that without ultrasonic vibration. |
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| Keywords: | biofuel cellulosic biomass pelleting switchgrass ultrasonic vibration |
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