Direct Numerical Simulation of biomass pyrolysis and combustion with gas phase reactions

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
61 Downloads (Pure)

Abstract

We present Direct Numerical Simulation of biomass pyrolysis and combustion in a turbulent channel flow. The model includes simplified models for biomass pyrolysis and char combustion along with a model for particle tracking. The gas phase is modelled as a mixture of reacting gas species. The gas-particle interactions for mass, momentum, and energy exchange are included by two-way coupling terms. The effect of two-way coupling on the conversion time of biomass particles is found noticeable for particle volume fractions > 10-5. We also observe that at constant volume fraction the effect of two-way coupling increases as the particle size is reduced, due to the higher total heat exchange area in case of smaller particles. The inclusion of gas phase homogeneous reactions in the DNS model decreases the biomass pyrolysis time due to higher gas temperatures. In contrast, including gas phase reactions increases the combustion time of biomass due to the lower concentration of oxygen at the particle surface.

Original languageEnglish
Article number032119
Number of pages8
JournalJournal of Physics: Conference Series
Volume745
Issue number3
DOIs
Publication statusPublished - 21 Oct 2016

Fingerprint Dive into the research topics of 'Direct Numerical Simulation of biomass pyrolysis and combustion with gas phase reactions'. Together they form a unique fingerprint.

  • Cite this