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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
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