Unique This project aims at a compact version of a gasifier by integrating the fluidized bed steam gasification of biomass and the hot gas cleaning and conditioning system into one reactor vessel. This can be obtained by placing a bundle of catalytic ceramic candles that will operate at a temperature as high as the gasification temperature (800-850°C) in the gasifier freeboard; furthermore, by using a catalytically active mineral substance for primary tar reforming and by optimising the addition of sorbents into the bed for removal of detrimental trace elements. The main objective is to develop an innovative
technology for the production of syngas with the specifications required
for use in fuel cells in a cost-effective way. The activity of
catalysts and sorbents is increased, while keeping high the thermal
efficiency of the whole conversion process as no cooling step is
included, and avoiding particle entrainment in the producer gas at the
reactor outlet. As a result, some
major advantages of traditional primary and secondary hot gas treatments
are combined together, without their well known respective drawbacks
(catalyst clogging by solid particles, loss of gas chemical and thermal
energy, etc.). In addition, a remarkable process simplification and
intensification is obtained:
This
arrangement will guarantee the conversion of tar, elimination of trace
elements and an efficient abatement of the particulate, delivering high
purity syngas, suitable to assure a high share of power generation even
in small- to medium-scale (few MWth) CHP and power plants, and to
increase the overall economic revenue. It is expected that this
innovation will provide a concrete contribution to the target fixed in
the work programme, of reducing the cost of electricity obtained by
means of advanced gasification systems below 0.04 €/kWh in 2020. |
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