Title:
Fuel Properties and Combustion Behaviour of Olive Tree and Vineyard Pruning Biomass
Author(s):
Fernández, M.J., Mediavilla, I., Barro, R., Borjabad, E., Bados, R., Esteban, L.S.
Document(s):
Paper
Poster
Abstract:
The objective of this work is to characterise olive tree pruning (OTP) and vineyard pruning (VP) and to determine the problems derived from the combustion of these solid biofuels, which are related to harmful compounds and trace elements emitted by stack, together with operational problems such as sintering of ash. For this purpose, fuel properties of olive tree and vineyard pruning biomass were determined in 20 samples in accordance with the ISO standards for solid biofuels. Physical and chemical analyses were compared with the ISO 17225 norm “fuel specification and classes” in order to classify these solid biofuels. A commercial stove (10.4 kWth) applicable to the residential sector was selected for the experimentation. In the combustion tests, continuous measurement of CO, NOx and OGC (organic gaseous compounds) and discontinuous measurements of total solid particles, SO2 and HCl in the exhaust gases were performed under European norms, and the values obtained were compared with Eco-design Regulation and Industrial Emissions Directive. According to physical and chemical characterization, some of their quality limits in ISO17225-2 and ISO17225-4, such as ash content, cannot be generally met by solid biofuels derived from olive tree and vineyard pruning. In that sense, the ISO17225-9 is selected in order to permit the classification of these solid biofuels in most cases. Regarding emissions, CO and OGC could fulfil the limits established by the Eco-design Directive of stoves. For reaching the requirements for NOx and total solid particles (TSP) emissions, primary measures could be needed such as a selection of higher diameters in the branches of the olive tree pruning. Taking into account the particles emitted in an OTP combustion test and by calculating, copper in exhaust gases results around 0.3 mg of Cu per Nm3. This value is close to the limit of 0.5 mg/Nm3 set by the Industrial Emissions Directive.
Keywords:
biomass, combustion, quality, chemical composition, quality standards
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Biomass pretreatment for solid fuels and production of intermediates
Event:
31st European Biomass Conference and Exhibition
Session:
4DV.6.16
Pages:
798 - 801
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-4DV.6.16
Price:
FREE
