Paper details

Title:

Catalytic Partial Oxidation of Model Biogas using Plasma-Assisted GlidArc Reactor

Author(s):

Rafiq, M.H., Owrang, F., Hustad, J.E.

Document(s):

Abstract:

In this work, the potential of the catalytic partial oxidation of model biogas (CH4/CO2=60/40) to produce synthesis gas (H2+CO) was both experimentally and thermodynamically studied at fixed pressure (1 bar) and electric power. The investigations were performed in a partially adiabatic plasma­assisted (nonthermal) GlidArc reactor using a Ni­based catalyst. Two cases were studied: in the first case, normal air was used, whereas enriched air (O2/N2=40/60) was utilized in the second case. In the findings from the first part of the study, the effect of the O2/CH4 molar ratio for both cases was studied and compared with thermodynamic equilibrium calculations at different bed exiting temperatures. In the second part of the study, the effect of the exiting bed temperature was studied at a fixed optimal O2/CH4 molar ratio for both cases. The main trends of the dry product molar concentration, the reactant conversions, the syngas yield and the efficiency based on the LHV (lower heating value) were analyzed and compared. Any deviations from equilibrium could be explained by temperature gradients. The results showed that CO2 could be used as a neutral gas. For the normal air case, an optimal value of the O2/CH4 ratio of 0.66, a GHSV (Gas hour space velocity) of 1.25 NL/(gcat.hr) and a maximum temperature (Tmax) of 870°C were good reforming choices, whereas for enriched air, these values were 0.64, 0.86 and 860°C, respectively.

Keywords:

biogas, catalytic conversion, reforming, syngas

Topic:

Fuels from biomass

Subtopic:

Gaseous biofuels

Event:

18th European Biomass Conference and Exhibition

Session:

OE5.1

Pages:

1664 - 1670

ISBN-13:

978-88-89407-56-1

ISBN-10:

88-89407-56-5

Paper DOI:

10.5071/18thEUBCE2010-OE5.1

Price:

FREE