Effect of H2 produced through steam methane reforming on CHP plant efficiency
Résumé
In situ hydrogen production is carried out by a catalytic reformer kit set up into exhaust gases for a CHP plant based on spark ignition engine running under lean conditions. An overall auto-thermal reforming process is achieved. Hydrogen production is mainly dependent on O2 content in exhaust gases. Experiments are conducted at constant speed at 2 air/fuel ratios and 4 additional natural gas flow rates. H2 content varies in the range 6-10% in vol. H2 content effect is analysed with respect to performance and emissions. Comparing with EGR shows an increasing of electrical efficiency of 1% whilst heat recovery decreases by 1%. NO and HC decrease by 18% and 12%, but CO increases by 14%, respectively. The results show that: (i) graphite joints were destroyed under effect of H2 and high temperature; (ii) a cold spot appeared in the RGR line, and condensation has as consequence a carbon deposit; and (iii) no back-fire or knock occurred. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Mots clés
A-carbon
Air/fuel ratio
Autothermal reforming
Catalytic reformers
CHP
CHP plant
Cold spots
Constant speed
Electrical efficiency
Graphite joints
High temperature
In-situ
Lean condition
Performance and emissions
Power
Energy efficiency
Environmental impact
Exhaust gases
Hydrogen
Hydrogen production
Methane
Natural gas
Waste heat
Steam reforming
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)
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