Title:
Fixed Bed Methanation of Biogeneous Syngas - Ideas for the Decentralized Approach
Author(s):
Kienberger, T., Mair, S., Karl, J.
Document(s):
Paper
Abstract:
In order to develop SNG-production systems for small scale decentralized applications a methanation test system was erected at TU-Graz. This bench scale system consists of an allothermal gasifier connected with a methanation test rig. This test-rig combines catalytic methanation with catalytic reforming of high hydrocarbons in one fixed bed reactor. For the removal of particles, alkali-metal components and sulphur impurities, separate devices are used. A challenge for this in-situ tar reforming within the process of methanation is the reactor’s heat management. With a polytrophic axial temperature control, temperature-peaks of around 500°C can be reached. The reason for this rise in temperature is the reaction enthalpy released by the exothermic methanation reaction. With appropriate reactor cooling, off-gas temperatures of around 300°C are possible. According to literature, temperatures in the range of the peak-temperatures are sufficient for tar-reforming. The gas temperature on the reactor’s exhaust allows gas-compositions with a high methane yield. In order to achieve a high efficient SNG-production, the steam input, necessary for gasification, must be minimized. In this context it has to be considered, that with low steam contents carbon depositions on the methanation catalyst occur.
Keywords:
allothermal gasification, bio-syngas, methanation, tar conversion
Topic:
Fuels from biomass
Subtopic:
Technologies and demonstration of second generation biofuels
Event:
18th European Biomass Conference and Exhibition
Session:
VP3.5.7
Pages:
1840 - 1847
ISBN-13:
978-88-89407-56-1
ISBN-10:
88-89407-56-5
Paper DOI:
10.5071/18thEUBCE2010-VP3.5.7
Price:
FREE
