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Title:
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Production of substitute natural gas by biomass hydrogasification
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Author(s):
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Published by:
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Publication date:
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ECN
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1-11-2000
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ECN report number:
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Document type:
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ECN-RX--00-038
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Conference Paper
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Number of pages:
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Full text:
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15
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Download PDF
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Presented at: Developments in Thermochemical Biomass Conversion, Tyrol, Austria, 17-22 september 2000.
Abstract:
Hydrogen, generated from renewable sources, is likely to play a majorrole in the future energy supply. The storage and transport of hydrogen can
take place in its free form (H2), or chemically bound, e.g. as methane.
However, the storage and transport of hydrogen in its free form are more
complex, and probably would require more energy than the storage and
transport of hydrogen in chemical form. An additional important advantage of
the indirect use of hydrogen as energy carrier is, that in the future
renewable energy supply, pads of the existing large-scale energy infra-
structure could still be used. Production of Substitute Natural Gas (SNG) by
biomass hydrogasification has been assessed as a process for chemical storage
of hydrogen. Thermodynamic analysis has shown the feasibility of this
process. The product gas of the process has a Wobbe-index, a mole percentage
methane, and a calorific value quite comparable to the quality of the Dutch
natural gas. With a hydrogen content below 10 mol%, the produced SNG can be
transported through the existing gas net without any additional adjustment.
The integrated system has an energetic efficiency of 81% (LHV). In the long
term, the required hydrogen for this process can be produced by water
electrolysis, with electricity from renewable sources. In the short term,
hydrogen may be obtained from hydrogen-rich gases available as by-product
from industrial processes. Results of thermodynamic analysis of the process
and experimental work, application potentials of the process in the
Netherlands, and plans for future development are presented. 21 refs.
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