Numerical Investigation of the Air-Steam Biomass Gasification Process Based on Thermodynamic Equilibrium Model

Qitai Eri, Wenzhen Wu and Xinjun Zhao
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Qitai Eri: School of Energy and Power Engineering, Beihang University, Beijing 100191, China
Wenzhen Wu: School of Energy and Power Engineering, Beihang University, Beijing 100191, China
Xinjun Zhao: School of Energy and Power Engineering, Beihang University, Beijing 100191, China

Energies, 2017, vol. 10, issue 12, 1-19

Abstract: In the present work, the air-steam biomass gasification model with tar has been developed based on the equilibrium constants. The simulation results based on two different models (with and without tar) have been validated by the experimental data. The model with tar can well predict the tar content in gasification; meanwhile, the predicted gas yield (GY), based on the model with tar, is much closer to the experimental data. The energy exchange between the gasifier and the surrounding has been studied based on the dimensionless heat transfer ratio (DHTR), and the relationship between DHTR and the process parameters is given by a formula. The influence of process parameters on the syngas composition, tar content, GY, lower heating value (LHV), and exergy efficiency have been researched.

Keywords: air-steam gasification; equilibrium model; tar; energy exchange; exergy efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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