gas quality, with a minimum tar content of 10 mg/Nm3 and HHV
between 4.85 and 4.48 MJ/m3 using a multi-staged gasification
technology.
The CO/CO2 and H2/CO ratios are constant; the heating value of
the gas is a direct consequence of its chemical composition, which
depends on the reaction conditions, rather than the heating value
of the entering biomass, equal for all those experienced.
The increase of the residence time of the gas mixture in reactor
as consequence of the modification in the combustion chamber
also has the undesirable effects of decreasing the efficiency and productivity of the gasifier; that is why these parameters are lower
than in commercial gasifiers. According to this, more experiments
are required to determinate the optimum angle to achieve a balance
between all these effects in order to obtain a clean gas without
diminish significantly the overall efficiency of the gasification
process. Furthermore the small size of experimental model and its
proportionally higher heat loss, influences in the overall process
efficiency.
These results have been obtained applying additionally, a
cleaning system truly simple and inexpensive, for particles
removing.