Study on physical and chemical properties of crop residues briquettes for gasification

摘要

The selection of material was done on the basis of availability and need of the gasifier design. Moreover, agricultural production in the country is increasing day by day with the agricultural mechanization, providing tremendous volume of agricultural residue every year. The volatile matter of soybean briquette, pigeon pea briquette and mix briquette was found to be in the range of 77.07 - 79.14%. Highest volatile mater found in briquette of mix biomass. Regarding volatile matter content, soybean briquette, pigeon pea briquette and mix briquette materials include about 70% volatile probably due to their high moisture content. Taking into account both ash and volatile matter contents, soybean briquette, pigeon pea briquette and mix briquette seem to be the best material for pyrolysis and gasification. Bulk densities were in the range of 598-675 kg/m~3. The bulk density was found more with pigeon pea briquette. Highest ash fusion temperature was found to be 1210℃, with pigeon pea briquette. The ash fusion temperatures indicate clinker formation. The Calorific values were found to be in the range of 4107-4520, cal/kg. The soybean briquette has higher calorific value than other briquette. Crop residues briquette can be used effectively as energy fuel for gasifier.