Design, construction and operation of a low-tar biomass (LTB) gasifier for rural applications

MD Mashiur Rahman*, Ulrik Birk Henriksen, Jesper Ahrenfeldt, Maria Puig Arnavat

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review


A low-tar biomass (LTB) gasifier with internal recirculation of pyrolysis gas and a separate combustor installed in the partial oxidation zone has been designed, developed and operated. The gasifier mixes the pyrolysis gases with gasifying air and burns the mixture in a combustor while maintaining a very low tar content in the producer gas that makes it suitable for direct use in an internal combustion engine. The resulting tar content is much lower than those obtained in previous studies for the same type of moving bed gasifier considering the heating value of the producer gas. The use of wood chips with a moisture content of 11–34 wt% as a fuel resulted in a very low tar content of 10.6 mg/Nm3 with a lower heating value of 4.56–4.96 MJ/Nm3. The temperature profile of the LTB Gasifier observed is relatively low compare to the typical moving bed gasifier. The producer gas obtained could be used directly in an internal combustion engine without observing deposits in the engine after operation. The behavior of the LTB gasifier can be described using a simple thermodynamic equilibrium model that has a good agreement with the model parameters.
Original languageEnglish
Article number117944
Number of pages12
Publication statusPublished - 2020


  • Biomass gasification
  • Gasifier design
  • Moving bed gasifier
  • Tar reduction process
  • Low-tar
  • Engine generator

Fingerprint Dive into the research topics of 'Design, construction and operation of a low-tar biomass (LTB) gasifier for rural applications'. Together they form a unique fingerprint.

Cite this