Title:
Pelletisation of Rye- and Wheat Straw with Additives
Author(s):
Narra, S., Dasgupta, S., Ay, P., Zheng, T., Weller, N.
Document(s):
Paper
Abstract:
Pelletizing biomass, especially straw and stalky materials, require a product-specific size reduction and liberation. This paper characterizes the cereal straws (rye and wheat) and specifies the necessities for production of energy pellets. The product-specific size reduction was achieved with the help of impact mill and twin-screw extrusion processes. Further, the moisture content and the particle size distribution play an important role in the pelletisation process and also with respect to the energy characteristics. Cereal straw pellets have a lower heating value of 17.2MJ/kg. The objective of this work is to increase the heating value from 17.2 MJ/kg to a value in between 18 and 18.5 MJ/kg. The pellets are prepared with increasing water contents and with the biogenous and fossil additives. The biogenous and fossil additives are chosen such that they ensure the necessary binding and simultaneously increase the heating value. Besides the heating value, the main pellet quality parameters such as mechanical stability, abrasion resistance, and combustion technical characteristics have been tested according to the existing norms (DIN51731, ÖNORM-M7135, DINplus). The particle size characteristics indicate an ideal distribution of the particles for the combustion in furnaces. The durability and mechanical stability of the pellets were in acceptance with the existing norms. Particle size characteristics, abrasion values, and strength characteristics showed a good correlation and displayed optimal combustion characteristics.
Keywords:
pelletization, agricultural residue straw, straw pellets, biomass-mix pellets, pelletisation
Topic:
Processes for Fuels from Biomass
Subtopic:
Characterisation and supply of solid biofuels
Event:
19th European Biomass Conference and Exhibition
Session:
OC5.3
Pages:
1878 - 1883
ISBN-13:
978-88-89407-55-4
ISBN-10:
88-89407-55-7
Paper DOI:
10.5071/19thEUBCE2011-OC5.3
Price:
FREE
