Comparison and Adequacy of Agricultural and Forest Resources with the Needs of Thermochemical Processes

Autor: Labalette, F., Briand, S., Laboubee, C., Da Silva Perez, D., Leygue, J.-P.
Jazyk: angličtina
Rok vydání: 2010
Předmět:
DOI: 10.5071/18theubce2010-vp1.3.34
Popis: This study presents the comparison between agricultural and forest resources related to the needs of thermochemical processes. 234 samples (133 agricultural and 101 forestry) from two years (2007 and 2008-) were selected and analysed with standard methods and common methodologies. For thermochemical processes, the levels of criteria elemental composition (carbon, hydrogen and oxygen) do not pose any problem. For nitrogen, two groups are clearly formed with a first group composed of grasses and summer annuals (immature and mature) with a rate higher than 1 % d.m. and a second group comprising perennials and forest biomass with lower rates below 0.5 % d.m. For chlorine, the content distribution is identical to that of nitrogen. The sulfur contents are similar between agricultural and forest biomass and do not exceed 0.2 % d.m. with the exception of a sample of platelets hardwood forest. These levels of nitrogen, chlorine and sulphur need to be minimized for the thermochemical processes because they are among the most sensitive criteria.. The forage grasses display the highest content of ash and silica, followed by summer annuals and perennials. Forest biomass contains less ash and less silica. The levels of potassium, calcium and sodium in the ash were also studied in this comparison. Forest biomass has a higher Low Heating Value (LHV) but with more variability. Grasses and summer annuals (immature and mature) form a first group with a lower LHV. The perennials, and especially perennials harvested in late winter form another group with a higher LHV approaching the LHV of forest biomass.
Proceedings of the 18th European Biomass Conference and Exhibition, 3-7 May 2010, Lyon, France, pp. 494-498
Databáze: OpenAIRE
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