Title:
Modelling of Co-Gasification of Biomass and Cow Dung in a Downdraft Gasifier
Author(s):
Jia, J., Sun, B.
Document(s):
Paper
Poster
Abstract:
One-dimensional chemical kinetics model of downdraft biomass gasifier has been developed in order to overcome the limitations of the equilibrium model. The mathematics models of pyrolysis, combustion and reduction zones of the downdraft gasification are combined to simulate the global process of biomass gasification. The gas composition, reaction temperature, and un-reacted char are predicted along height of the reduction zone. Effect of operating parameters, such as moisture content, equivalence ratio and biomass content on char flow rate and overall performance of downdraft is examined. The model predictions agrees well with the temperature distribution and exit gas composition obtained from experiments. It is found that char in the biomass tends to be converted with decreasing of moisture content and increasing of equivalence ratio due to higher temperature in reduction zone of gasifier. The entire conversion of char in biomass could be expected on the condition of moisture less than 0.2, equivalence ratio more than 0.42.The LHV of the product gas is reduced by 65% due to the increase of cow dung content from zero to 90% in the mixture of biomass and manure.
Keywords:
biomass, downdraft gasifier, gasification, modelling
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Gasification for synthesis gas production
Event:
24th European Biomass Conference and Exhibition
Session:
2CV.3.102
Pages:
978 - 981
ISBN:
978-88-89407-165
Paper DOI:
10.5071/24thEUBCE2016-2CV.3.102
Price:
FREE
