Title:
Polygeneration at the Biomass Steam Gasification Plant Oberwart - Evaluation of Process Chains to Produce Hydrogen, Electricity and Heat
Author(s):
Benedikt, F., Kraussler, M., Konlechner, D., Bosch, K., Hackel, M., Hofbauer, H.
Document(s):
Paper
Poster
Abstract:
This work presents an evaluation of two process chains to produce renewable H2 from the wood gas generated by the biomass CHP plant Oberwart. Based on several thousand hours of operation, which were carried out at test facilities within the last years, mass and energy balances of different process set-ups were simulated and evaluated using the simulation software IPSEpro. For gas cleaning and upgrading five process steps (process units) were considered: (1) Carbon monoxide conversion over a catalyzed water gas shift (WGS) reaction to increase the H2 content (2) Gas cleaning in a wet chilled gas scrubber (GS) with organic solvent (3) H2 enrichment in a membrane (MEM) separation unit (4) H2 purification in a pressure swing adsorption (PSA) unit (5) Demonstration of the utilization of the pure H2 in a commercial proton exchange membrane (PEM) fuel cell. Experiments and long term test runs with two process chains were investigated in detail: Process Chain I: GS-MEM-PSA Process Chain II: WGS-GS-PSA. Summarizing the results, both process chains achieve high fuel conversion efficiencies of 77 %. Process chain I should be applied if less H2 is needed and the power and heat demand is prioritized, whereas process chain II can reach higher H2 yields.
Keywords:
hydrogen, wood chips, renewable energies, polygeneration, dual fluidized bed
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Gasification for power, CHP and polygeneration
Event:
23rd European Biomass Conference and Exhibition
Session:
2DV.1.12
Pages:
792 - 799
ISBN:
978-88-89407-516
Paper DOI:
10.5071/23rdEUBCE2015-2DV.1.12
Price:
FREE
