Effect of Hydrolysis Lignin on Eucalyptus Sawdust Pelleting Process
LI Wei-zhen1, 2, 3, JIANG Yang1, 2, 3, YIN Xiu-li1, 2, 3, LUO Guang-hui4
1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; 2. CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China; 3. Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China; 4. Tonghe County Longneng Resources Recycling Co., Ltd., Harbin 150900, China
Abstract：Pelleting properties of eucalyptus sawdust were studied with addition of hydrolysis lignin. The single pellet compression experiments were conducted on an electronic pressure machine. The effect of parameters including hydrolysis lignin adding amount, moisture content, pressure, particle size on specific energy consumption, relaxed density, and Meyer Hardness were studied in detail. The results indicated that the addition of hydrolysis lignin can improve the performance of the pellets. The appropriate adding amount was 20% ~ 30%. The pellets had better quality with moisture content of 12% ~ 14%, pressure of 6 000 ~ 7 000 N, and particle size of 2 ~ 3 mm. Scanning electron microscopy images showed that the hydrolysis lignin can cover evenly on the surface of the particles when the adding amount was 20% ~ 30%. The particles could bind tighter when the pressure was increased and the particle size was decreased in a certain range. This work can provide some theoretical guidance for improving the quality of eucalyptus sawdust pellets.
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2018, Vol. 6 
