This paper addresses the syngas production and evaluation losses in high temperature gasifica-

tion process using coffee husks. A fast and inexpensive way to evaluate the losses in gasification 

processes is by the application mathematical models which allow to predict the values needed in 

full scale. Hence, the quantification of gasifier’s losses at temperatures ranges of 800 K – 1400 K at 

an equivalence ratios of 0.3, 0.35 and 0.4 at 1 bar are revealed by using exergy model incorporat-

ing a chemical equilibrium model. The model evaluated the product syngas compositions, syngas 

heating values and degree of irreversibility values (losses). The results from the model showed 

that the production of H2 increased from 9.9% to 18.9% and the formation of CO2 ranges from 7.2% 

to 12.3%. CO production is from 21.8% to 17.2%. The irreversibility values obtained were less 

than 27%. Hence, reduction of losses protracts biomass resources to be used in energy generation.


Coffee Husks, Equivalence Ratio, Exergy, Gasification, Irreversibility (Losses)

  • : Ethel D. Kasembe et al
  • : yes
  • JPEE_2015051916312835
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