For trouble free operation, engine must be supplied with producer gas that is sufficiently free from tars, dust and acids. For satisfactory IC engine operation, an acceptable particle content less than50 mg/Nm3 and a tar content less than100 mg/Nm3 is postulated. The cleaning of gas is necessary to avoid wear and tear in engine. Dust concentration in the gas depends upon the type of gasifier, intensity of load and type of fuel. As load increases, dust concentration in producer gas also increases. The removal of tar from gas producer is one of the more difficult problems in gas cleaning.
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