Indicators characterising calorific value of reed canary grass and last year's grass
2014
Platace, R., Latvia Univ. of Agriculture, Jelgava (Latvia) | Adamovics, A., Latvia Univ. of Agriculture, Jelgava (Latvia)
Recent trends towards environmentally friendly economies promote biofuels; moreover, many researchers suggest producing bioenergy from grass. However, suitability of various grasses for this particular purpose should be studied more in detail. Pellets require biomass with good calorific value indicators, therefore, this research aims at comparing them in last year’s grass and reed canary grass (RCG) biomass harvested in spring and autumn of two different years (2010 and 2011) and determining the suitability thereof for the heat production in Latvia. The research resulted in finding the following: RCG dry matter harvested in spring has the lowest ash content (3.1 %); the most suitable moisture content of spring last year’s grass and RCG constitutes 9.8 % and 9.9 %, respectively; the highest combustion ability was observed for last year’s grass yielded in spring (19.0 MJ•kgE-1); and ash melting temperature for spring RCG comprises 1170-1265 ºC and of last year’s grass 1060-1140 ºC. The results acquired show that, as compared to RCG dry matter harvested in both, autumn and spring, last year’s grass dry matter samples have better moisture and ash content as well as higher combustion ability; therefore last year’s grass is very suitable for production of heat.
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