The future industrial development of biomass energy depends on the application of renewable energy
technology in an efficient manner. Of all the competing technologies under biomass, gasifiers are considered
to be one of most viable applications. The use of biomass fuel, especially biomass wastes, for distributed
power production can be economically viable in many parts of the world through gasification of biomass.
Since biomass, is a clean and renewable fuel, gasification gives the opportunity to convert biomass into clean
fuel gas or synthesis gas for industrial uses. The preparation of feedstock for a gasifier requires time, energy
and labour and this has been a setback for gasifier technology development. The present work is focused on
gasification of long-stick wood as a feed material for gasifiers. This application makes reduction not only in
the cost but also on the power consumption of feed material preparation. A 50 m3/h capacity gasifier was
fabricated in the cross draft mode. The cross draft mode makes it possible to produce low tar content in
producer gas. This cross draft mode operates with 180W of blower supply for air to produce 10 kW of
thermal output. The initial bed heights of the long-stick wood and charcoal are 58 cm and 48 cm respectively.
Results were obtained for various flow conditionswith air flow rates ranging from 20 to 30 m3/h. For modelling,
the flaming pyrolysis time for long-stickwood in the gasifier is calculated to be 1.6 min. The length of the flaming
pyrolysis zone and char gasification zone is found to be 34 cm and 30 cm respectively. The rate of feed was
between 9 and 10 kg/h. Continuous operation for 5 h was used for three runs to study the performance. In this
studywemeasured the temperature and pressure in the different zones as a function of airflow.Wemeasured the
gas flow and efficiency of the gasifier in order to determine its commercial potential for process and power
industries.
The future industrial development of biomass energy depends on the application of renewable energytechnology in an efficient manner. Of all the competing technologies under biomass, gasifiers are consideredto be one of most viable applications. The use of biomass fuel, especially biomass wastes, for distributedpower production can be economically viable in many parts of the world through gasification of biomass.Since biomass, is a clean and renewable fuel, gasification gives the opportunity to convert biomass into cleanfuel gas or synthesis gas for industrial uses. The preparation of feedstock for a gasifier requires time, energyand labour and this has been a setback for gasifier technology development. The present work is focused ongasification of long-stick wood as a feed material for gasifiers. This application makes reduction not only inthe cost but also on the power consumption of feed material preparation. A 50 m3/h capacity gasifier wasfabricated in the cross draft mode. The cross draft mode makes it possible to produce low tar content inproducer gas. This cross draft mode operates with 180W of blower supply for air to produce 10 kW ofthermal output. The initial bed heights of the long-stick wood and charcoal are 58 cm and 48 cm respectively.Results were obtained for various flow conditionswith air flow rates ranging from 20 to 30 m3/h. For modelling,the flaming pyrolysis time for long-stickwood in the gasifier is calculated to be 1.6 min. The length of the flamingpyrolysis zone and char gasification zone is found to be 34 cm and 30 cm respectively. The rate of feed wasbetween 9 and 10 kg/h. Continuous operation for 5 h was used for three runs to study the performance. In thisstudywemeasured the temperature and pressure in the different zones as a function of airflow.Wemeasured thegas flow and efficiency of the gasifier in order to determine its commercial potential for process and powerindustries.
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