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Biomass higher heating value

TABLE 3.8 Comparison of the Measured and Calculated Higher Heating Values of Biomass, Coal, and Peat ... [Pg.79]

The heating value depends on the moisture and ash contents of the densified material and is usually in the range of 15 to 17 MJ/kg. The use of asphaltic binders or pelletizing conditions that result in some carbonization can yield densified products that have higher heating values. Pellets, briquettes, and logs have been manufactured by densification methods from biomass for many years. Prestologs made from waste wood and sawdust were marketed before 1940 in North America, and the market for pellet fuels made from wood... [Pg.177]

Klass (1980). Methane fermentation conditions were daily feeding, continuous mixing, 35°C, pH 6.7 to 7.2, 12-day retention time, for kelp, which was 2,1 kg VS/m -day, All biomass was 1.2 mm or less in particle size. The blends are described in detail in the volatile solids (organic matter). HHV is higher heating value. [Pg.474]

Biomass CFBG will be studied in a pilot scale plant. Several test runs will be carried out with orujillo and wood waste as a fuel. The main objectives of these tests being to investigate the effects of the equivalence ratio, temperature and fluidisation velocity on the gas production rate from biomass CFBG, and to evaluate the quality of the producer gas as measured by the composition and higher heating value. Process variables to be analyzed are ... [Pg.217]

The fuel consumption rate is a direct measure of cooking power, provided all the gas is subsequently burned in the burner section. The heating value of most biomass with 5-10% moisture (Denver dry) is -18 kj/g, The stove typically produces 20-25% charcoal after the volatiles have been burned. The charcoal typically has a higher heating value of -24 kJ/g. In the tables the power level is calculated from these values. A gasification rate of 10 g/m gives 2.5 kW, coit )arabIe to the large burner on modem gas or electric stoves. [Pg.699]

The amount of land required depends on the tree yield, power plant efficiency, and the capacity factor. The average biomass yield was assumed to be 11.3 dry ton/hectare. The power plant efficiency is based on a dry higher heating value of 20,200 kj/kg. A power plant annual capacity factor of 86.3% was assumed. Power plant sizes of 25, 50, and 150 MW were considered. [Pg.821]

Rating index for liquefaction is given in equation (2) which is defined as product of liquid yield and higher heating value of pyrolysis liquids divided by mole of hydrogen required per mole of carbon in biomass liquids for upgrading to premium fuel. [Pg.1026]

Yin, C.-Y. 2011. Prediction of Higher Heating Values of Biomass from Proximate and Ultimate Analyses. Fuel 90 (3) 1128-1132. [Pg.151]

Given the chemical conqiositions of these various components of wood, the higher heating value of woody biomass can be approximated by the following formulae ... [Pg.136]

The higher heating values of the residues shown in Table 5.3, with the exception of out of date hybrid com seed, are substantially lower than those associated with woody biomass or coal, and those associated with switchgrass grown for energy purposes. Much of this can be attributed to the higher ash contents associated with herbaceous materials— particularly residues from agribusinesses. The density and heat content of the hybrid com seed has made it a desirable herbaceous opportunity fuel when conditions are favorable. [Pg.194]


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