The photograph of the gasifier unit is shown in Fig 1. The unit consists of a downdraft gasifier, heat exchanger, cleaning
cum cooling chamber, drum and a flow meter [5]. Coal was used to initiate the gasification process. About 10 12 pieces of
coal was fed into the gasifier and then it was ignited. Air was inducted with the help of a blower. The flow of air was
regulated as per the requirement. Once the ignition of coal starts, a mixture of wood chips and mustard oil cake in the ratio
of 7:3 by weight was fed into the hopper. The blower supplied air in such a way that the biomass burnt partially and
generates producer gas [6]. This producer gas thus passed through the gap between gasification zone and casing of
gasification zone. Here most of the heavier particles get stuck and tar present in producer gas gets creaked. Now this
producer gas was allowed to pass through a heat exchanger where the temperature of producer gas got reduced [7]. Further,
the producer gas passed through the cleaning cum cooling chamber where it was cleaned as well as cooled [8-9]. The
physical properties of producer gas are shown in Table 2.[