Refining Biogas Produced from Biomass: An Alternative to Cooking Gas

Our life is completely dependent on a reliable and adequate supply of energy. In other to reduce dependence on fossil fuels, the use of animal dung in producing a renewable alternative source of energy has been proved using cow dung. This work is aimed at produced and refined bio gas from animal dung by reduces the H2S and CO2 content of bio gas in other to improved the quality of the bio gas to be used as an alternative to the petroleum based produces in use now. The sample of gas produced was passed through the gas chromatography to determine the percentage composition (mol % dry basis) of the bio gas contents. The results of the bio gas before refinement were 54.09% mole dry CH4, 40.02mole % dry CO2 and 0.80mole % dry H2S which conformed with the literature values of 50 65 % mole dry CH4, 35 50 % mole dry CO2 and 0.1 1.0 % mole dry H2S. After refining, the composition of bio gas on dry basis were 54.09% mole dry CH4, 4.01% mole dry CO2, 0.02% mole dry O2, 0.05% mole dry NH3, 0.01% mole dry H2S, 0.5% mole dry H2 and 2.54% mole dry N2. Analysis of the remnant indicated that it could be used for plant nutrient.