Title:
Combustion Tests of Pellet Made of Different Herbaceous Energy Crops in a Small Scale Pellet Boiler
Author(s):
Picco, D., Vecchiet, A., Correale Santacroce, F., Pointner, C., Wopienka, E.
Document(s):
Paper
Abstract:
Herbaceous energy crops are generally characterized by a higher ash content with a low melting point, and can contain high levels of nitrogen and sulphur, if compared to the wooden biomass. A series of combustion tests were carried out using a 15 kW commercial scale boiler in order to evaluate the possible application of pellets made using different energy crops (fiber sorghum, miscanthus and giant reed). The combustion performance, the tendency to the slag formation as well as the flue gas composition (O2, CO2, CO, NOX, SO2, VOC and particulate emissions) were investigated. Sorghum presents a very high content of ashes with a low melting point. Its use in the traditional boilers is not advisable because of the high tendency to the slag and ash cake formation and the high level of dust emissions. Miscanthus and giant reed, despite the high ash content and the unfavourable ash melting properties, can be burned in commercial pellet boilers, as long as the boiler is adapted and optimised for high ash content fuels. The measured high level of NOX and SO2 emissions is highly related to the concentration of N and S in the fuel.
Keywords:
ashes, combustion, emissions, agropellets
Topic:
Technology Deployment and Industrial Demonstration
Subtopic:
Biomass utilisation in the heat and CHP sector
Event:
19th European Biomass Conference and Exhibition
Session:
VP4.1.2
Pages:
2244 - 2249
ISBN-13:
978-88-89407-55-4
ISBN-10:
88-89407-55-7
Paper DOI:
10.5071/19thEUBCE2011-VP4.1.2
Price:
FREE
