[Gasification] Brazil: Effects of Biomass Properties on the Performance of a Gasifier/Genset System

[tmiles at trmiles.com]

Biomass can be considered one of the most important sources of energy in the
world, because it is: renewable; neutral in terms of green-house gases
emissions; capable of replacing conventional fossil fuels, among other
factors. On the other hand, gasification is an efficient process of turning
available the chemical energy of biomass, with a relatively simple
technology. In the present work a co-current open top downdraft gasifier is
used, with an 8.5 kW thermal power capacity to fuel an 18 Hp Otto cycle
engine coupled to an electric generator. With this apparatus, it was
possible to analyze the influence of some properties of the fuel wood
particles (size, density, moisture content and so on) on the efficiency of
the energy conversion process. Considering the straight correlation between
the gases, CO and CO2, their production and the particle size, it was
concluded that the larger the sample, the greater the CO percentage in the
poor gas composition. The higher heating value of the poor gas, a direct
function of the CO level, was associated with the smaller biomass density,
offering the maximum efficiency of the system in generating electric power.
The maximum efficiency of the system (gasifier/genset), ηsys, for generating
electricity was 11.9 %, given that the efficiency of the combustion internal
engine was just 16.87%.

https://bit.ly/39yMD3E

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