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Hydrogen-Enriched Syngas from Biomass
Steam Gasification for Use in Land-Based
Gas Turbine Engines
John Dascomb and Anjaneyulu Krothapalli
Abstract This paper presents the results from an experimental study on the
production of hydrogen-enriched syngas through un-catalyzed steam biomass
gasi
cation. Wood pellets were gasi
ed using a 100 kW th fl
fluidized bed gasi
er at
temperatures up to 850
C. The syngas hydrogen concentration was found to
increase with both bed temperature and steam
°
to-biomass weight ratio, reaching a
maximum of 51 %. The overall energy conversion to syngas (based on heating
value) also increased with bed temperature but was inversely proportional to the
steam-to-biomass ratio. The maximum heating value measured was 16.1 MJ/m 3 ,
occurring at a temperature of 697
-
C, a S/B of 0.7, and a residence time of 1.9 s.
The maximum energy conversion to syngas was found to be 68 %. Further analysis
revealed that to produce syngas with high hydrogen concentration, inert-
°
fl
fluidized
gasi
cation was the most ef
cient method tested in this study. While
fl
fluidized bed
gasi
cation with CaO was found to be less ef
cient than inert-bed gasi
cation, it
does produce syngas with higher hydrogen concentration.
Keywords Biomass steam gasi
cation
Syngas
Gas turbine engines
Energy
conversion
1 Introduction
Worldwide, the use of energy from all sources will increase over the next few
decades, primarily because of the demand driven by high GDP growth nations, such
as China and India. Given the expectation that crude oil prices will remain relatively
high, and petroleum and other liquid fuels are the world
s slowest growing energy
sources. Additionally, the concern about environmental consequences of green
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