Gasification of Powdery Biomass/Coal/Industrial Wastes

A 30kW_e capacity entrained flow biomass/coal gasifier has been successfully developed at IMMT to gasify the powdery biomass such as rice husks, saw dusts, coir dusts and coal with other industrial wastes.

The developed gasifier reactor with L/D ratio (Length to Diameter of gasifier) of 10 has been adopted to improvise the mixed flow and plug flow reactor characteristics to ensure full suspension of powdery biomass/coal in a vigorous radial mixing condition in the reactor and to achieve high intensity reaction and gasification which are essential for entrained flow gasification. Based on the simple plug flow characteristics, a gas residence time of about 2 second has been adopted for the gasifier. The gasifier-reactor attains a temperature in the range of 900-1200 ^oC to take the advantages of the kinetics of the process and produce low tar and char formation. By maintaining a pre-estimated Equivalent Ratio (ER) of 0.27, temperature of the partial oxidation can be varied as per requirement. The endothermic steam induced reactions with a steam injection coupled with the gasification reactions conserves the sensible process heat in the form of more hydrogen and carbon monoxide.

• Capable of handling feed stocks with wide range of particle sizes
• Renewable source of energy generation
• Reduction in carbon emission
• Value addition to huge agro-wastes/industrial wastes