Downdraft Gasifier Case Study
“EXPERIMENTAL STUDIES ON PRODUCER GAS GENERATION FROM WOOD WASTE IN DOWNDRAFT GASIFIER”
In the article Partik.N.Sheth and B.V Babu performed studies on gas generation from wood waste in downdraft gasifier.
They arranged an experimental setup of downdraft gasifier consisting of four zones drying, pyrolysis, oxidation and reduction. In downdraft gasifiers pyrolysed gas and moisture generated in drying and pyrolysis zones flow downwards. They fed the biomass in gasifier and oxidized it in the zone where continuous air was supplied from the two inlet air nozzles. The heat generated in the combustion zone was supplied to drying and pyrolysis zones. The heat released from biomass combustion raised the temperature of biomass particles and thus they …show more content…
The samples of gas coming out after gasification were stored in syringes. Results presented in the article are average value of each lap. Sample gas was analyzed with gas chromatograph (NUCON 5765) with thermal conductivity detector. In the experimental study air flow rate was varied from 1.8-3.4m^3/h and moisture content was varied from 4%-12%. Biomass consumption rate was found from 0.1-3.6kg/h. The furniture waste usually known as sesame wood or rose wood was used as biomass. The heating values for the experimental study can be calculated from the formula HHV= 0.3536FC + 0.1559VM – 0.0078ASH. In order to remove the no. of parameters on which gasification depends they defined an equivalence ratio to reflect the combined effect of air flow, wood supply rate and duration of the run. The values for equivalence ratio were calculated for each run. The stoichiometric ratio were found to be 5.22m^3 air/kg of wood. Total mass input includes feedstock, air and total water and total mass outputs were comprised of producer gas and charcoal. The average mass balance was found to be 89% of six experimental runs. In the study they found the importance of moisture content. When they increased moisture content, the biomass consumption rate was decreased and vice versa. The energy required for drying increased with increasing moisture content. They noticed that higher values of moisture content could be used for updraft
In the article Partik.N.Sheth and B.V Babu performed studies on gas generation from wood waste in downdraft gasifier.
They arranged an experimental setup of downdraft gasifier consisting of four zones drying, pyrolysis, oxidation and reduction. In downdraft gasifiers pyrolysed gas and moisture generated in drying and pyrolysis zones flow downwards. They fed the biomass in gasifier and oxidized it in the zone where continuous air was supplied from the two inlet air nozzles. The heat generated in the combustion zone was supplied to drying and pyrolysis zones. The heat released from biomass combustion raised the temperature of biomass particles and thus they …show more content…
The samples of gas coming out after gasification were stored in syringes. Results presented in the article are average value of each lap. Sample gas was analyzed with gas chromatograph (NUCON 5765) with thermal conductivity detector. In the experimental study air flow rate was varied from 1.8-3.4m^3/h and moisture content was varied from 4%-12%. Biomass consumption rate was found from 0.1-3.6kg/h. The furniture waste usually known as sesame wood or rose wood was used as biomass. The heating values for the experimental study can be calculated from the formula HHV= 0.3536FC + 0.1559VM – 0.0078ASH. In order to remove the no. of parameters on which gasification depends they defined an equivalence ratio to reflect the combined effect of air flow, wood supply rate and duration of the run. The values for equivalence ratio were calculated for each run. The stoichiometric ratio were found to be 5.22m^3 air/kg of wood. Total mass input includes feedstock, air and total water and total mass outputs were comprised of producer gas and charcoal. The average mass balance was found to be 89% of six experimental runs. In the study they found the importance of moisture content. When they increased moisture content, the biomass consumption rate was decreased and vice versa. The energy required for drying increased with increasing moisture content. They noticed that higher values of moisture content could be used for updraft