List of calorific values for some biomass fuels

2019-02-14 14:09:28 Author：zgboiler

　　Some species of biomass tend to have more energy per unit of mass than others. However, the variation between species is often no greater than the natural variations found within one species or another. The heat content of a fuel type can vary significantly depending on the climate and soil in which the fuel is grown, as well as other conditions. As a result, the energy content of a biomass fuel should be thought of as a range rather than a fixed value.

　　Common biomass calorific value table

Agricultural residue and waste species	Minimum GCV (MJ∙kg−1 )	Maximum GCV (MJ∙kg−1 )	Range GCV (MJ∙kg−1 )	Mean GCV (MJ∙kg−1 )
Rice husk with moisture content 8.30%	15.875	16.057	0.182	15.972
Rice husk without moisture (dried at 105˚C for 24 h)	16.546	16.748	0.202	16.643
Rice straw with moisture content 12.19%	15.012	15.130	0.118	15.092
Rice straw without moisture (dried at 105˚C for 24 h)	16.345	16.580	0.235	16.475
Pistachios shells	17.247	17.431	0.184	17.320
Cotton plant main stem	17.645	17.799	0.154	17.733
Energy crops species
Cardoon (Cynara cardunculus L. var. altilis)	14.675	15.379	0.704	14.986
Switchgrass (Panicum virgatum L.) rain fed	17.281	17.327	0.046	17.308
Common reed (Phragmites atralis) fresh leaves	17.135	17.636	0.501	17.494
Narrow-leaf cattail (Typha angustifolia) fresh stem	17.172	17.314	0.142	17.230
Forest species
Poplar (Populus euro-america) with moisture content 24.17%	14.323	14.613	0.290	14.432
Poplar(Populus euro-america) without moisture(dried at 105˚C for 24 h) 19.193 19.476 0.283 19.371	19.193	19.476	0.283	19.371
Biomass Pellet	Diameter(mm)	Length(mm)	GCV(MJ∙kg−1)	Ash content(%)
Medicago sativa pellets	6.20	21.75	16.019	4.42
Cotton pellets 6.20 21.75 16.988 3.49	6.20	21.75	16988	3.49
Common reed pellets	6.20	21.75	16.471	7.46
Narrow-leaf cattail pellets	6.20	21.75	16.584	6.78
Poplar (Populus euro-america) pellets	6.20	21.76	17.814	0.79

Different representation(1 MJ/kg = 0.28 kWh/kg = 430 Btu/lbm)

biomass fuel	(MJ/kg)	(Btu/lb)	(kWh/kg)
Alfalfa straw	18.5	5.18	1953
Coal	28	7.84	120037
Coconut husks	10	2.8	4299
Coconut shells	18	5.04	7738
Commercial wastes	16	4.48	6878
Cotton hulls	19.5	5.46	8383
Domestic refuse	9	2.52	3869
Groundnut shells	20	5.6	8598
Maize cobs	19	5.32	8168
Maize stalks	18	5.04	7738
Paper, newspaper	17	4.76	7308
Straw, harvested, baled	15	4.2	6449
Sorghum bagasse	19	5.32	8168
Sugar cane residues	17	4.76	7308
Wood, oven-dried to 0% moisture	18	5.04	7738
Wood, air-dried to 20% moisture	15	4.2	6449