1. The oxygen enriched air blown pressurized fluidized bed pilot scale refractory lined gasifier of 1.5 TPD feed capacity is equipped in such a way that it can be operated in air/ oxygen/oxygen enriched air/ steam as well as their mixture in any proportion as per process requirement. Gasification performance of a particular feed material can be judged in this test facility within a short span of time for its commercial exploitation.

2. The said system has distinct advantages of having solid fuel feeding system comprising of variable RPM multi-pocket rotary feeder, screw feeder and two feed nozzles connected to the feeder assembly having different inclination, one is just above the distributor and another is above the bed in the gasifier to handle coal; biomass; washery rejects; and their blends in any proportion in the actual atmosphere which prevails in the commercial gasifier ensuring combustion of some fraction of the feed to provide enthalpy to drive endothermic gasification of the reaming feed to generate syngas for thermal and various downstream applications. Further, while one nozzle is being used for feeding, the other may be used for bed sampling during the experimental run.

3. Freeboard section of the refractory lined gasifier is of sufficient length to ensure desired residence time of the generated syngas at high temperature to produce tar-free syngas from different feedstock as well as minimum fine elutriation.

4. Refractory lining of the gasifier is designed in such a way that it can withstand the pressure, temperature, minimize the erosion and heat loss as well as the expansion and contraction during heating and cooling cycle.

5. The said system is having advantages of reactant feeding system comprising of steam generator with accumulator, air compressor with gas holder, PSA based oxygen generator, booster and header with the provision of heating of different gaseous streams in the range of 150 - 600 °C as per process requirement before entering into the gasifier depending on the combustibility and gasification characteristics of different carbonaceous feedstock.

6. Present device has advantage to withdraw the ash particles either in the dry form or in agglomerated form in a controlled manner. 7. Present system has removable air plenum section of multiple distributors with varying number and sizes of orifices to adjust reactant velocity and flow during endothermic gasification reactions. Removable air plenum has the advantages of easy cleaning and maintenance of the distributor leading to smooth and trouble free operation. 8. Present device has the Provision of Nitrogen flushing arrangement in the entire system to tackle any kind of emergency situation during operation. Inflow of nitrogen dilutes reactant components in the gasifier to stop sudden temperature shoot up which may cause ash agglomeration and clinker formation inside the gasifier.

9. Present device has wide range of operational flexibility with respect to pressure, temperature, feed rate of fuel and gaseous reactant, residence time, particle size and particle density.

10. The present system has also arrangement for product gas analysis with the help of on-line gas analyzer coupled with the system in exit line or provision for collecting the outgoing gas from the sampling port with the help of any gas sampling arrangement for off-line gas analysis purpose