Title:
Influence of Lignosulphonate Addition on Poplar Pelletisation and Combustion
Author(s):
Mediavilla, I., Alfaro, N., Esteban, L.S., Carrasco, J.E.
Document(s):
Paper
Abstract:
Poplar has demonstrated to be a tough material to be pelletised, and this makes the use of additives, like maize starch and lignosulphonate, to be considered in order to improve the process and the pellets quality. The objective of this work is to evaluate the influence of the addition of lignosulphonate on pelletisation process of poplar and their effects, regarding the SO2 emission and sulphur content in ashes, on combustion process. Poplar has been pelletised with the following doses of additives: 2.5% maize starch; 2.5% maize starch + 1% lignosulphonate; 2.5% maize starch + 5% lignosulphonate; 2.5% maize starch + 7% lignosulphonate. Pelletisation tests have been carried out in a pilot plant with a flat die pellet press (30 kW) and combustion tests have been carried out in a 116 kWth fixed grate boiler. The major conclusions of the work are that lignosulphonate addition increases the output of the poplar pelletisation process and it improves the physical quality of the pellets obtained. However, sulphur added with lignosulphonate leads to increase the SO2 emissions during combustion, being decreasing the percentage of sulphur retained by ashes (from 39 to 19%) when lignosulphonate dose is increased (from 1 to 7%)
Keywords:
additives, combustion, pelletization, poplar, pelletisation
Topic:
Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Combustion for small and medium scale applications
Event:
19th European Biomass Conference and Exhibition
Session:
VP2.1.21
Pages:
1271 - 1276
ISBN-13:
978-88-89407-55-4
ISBN-10:
88-89407-55-7
Paper DOI:
10.5071/19thEUBCE2011-VP2.1.21
Price:
FREE
