Simulation of acacia gasification process

István Bodnár

doi:10.14232/analecta.2020.1.24-33

Authors

István Bodnár University of Miskolc

DOI:

https://doi.org/10.14232/analecta.2020.1.24-33

Keywords:

acacia, gasification, pressure, temperature, air-ratio, reaction efficiency

Abstract

This electronic document presents the thermokinetical modelling of the gasification process done on acacia-tree with variable operating conditions and different humidity levels. Gasification does not produce flue gas, but due to imperfect burning, synthesis gas appears which is rich in flammable components (CO₂ and H₂). The chemical structure of this gas depends on the components of the fuel and the humidity level, but greatly affected by the technological parameters too, such as pressure and temperature, as well as the air-ratio. The study shows the change in the amount of the fuel and the reaction efficiency, caused by varying gasification temperature and pressure. Rising temperature results in improved efficiency, while higher pressure worsens reaction efficiency. However, at higher temperature intervals, the effect of the pressure is neglectable.

Downloads

Download data is not yet available.

References

Z.A. Zainal, R. Ali, C.H. Lean, K.N. Seetharamu, Prediction of performance of a downdraft gasifier using equilibrium modelling for different biomass material, Energy Conversion and Management, vol. 42. 2001. pp. 1499−1515.

T.B. Red, A. Das, Handbook of biomass downdraft gasifier engine systems, Solar Energy Research Ins., 1988. p. 148.

T. Hill, S. Dowen, Pyrolysis and gasification. Briefing (Draft 2), UK Without Incineration Network (UK WIN), 2010. p. 9.

M.G. Patterson, What is energy efficiency? Concepts, indicators and methodological issues, Energy Policy, vol. 24, No. 5. 1996. pp. 377−390.

Y. Wang, C.M. Kinoshita, Kinetic model of biomass gasification, Solar Energy, vol. 51. no. 1. 1993. pp. 19−25.

A. Mountouris, E. Voutsas, D. Tassios, Solid waste plasma gasification: equilibrium model development and exergy analysis, Energy Conversion and Management, vol. 47. 2006. pp. 1723−1737.

K.S. Hatzilyberis, Design of an indirect heat rotary kiln gasifier, Fuel Processing Technology, vol. 92. 2011. pp. 2429−2454.

C. Morly, Method for calculating equilibrium compositions at specified temperature, Gaseq, a chemical equilibrium program for windows. www.gaseq.co.uk, 2001. p. 6.

K.A. Rajvanshi, Biomass gasification, Alternative Energy in Agriculture, vol. 2. no. 4. 1986. pp. 83−102.

G. Schuster, G. Löffer, K. Weigel, H. Hofbrauer, Biomass steam gasification – an extensive parametric modeling study, Bio resource Technology, vol. 77. 2001. pp. 71−79.