[01] Syamsuri , Mechanical Engineering Department, Institut Teknologi Adhi Tama Surabaya, Surabaya, Indonesia. [02] Nyoman Puspa Asri, Chemical Engineering Department, Universitas WR Supratman Surabaya, Surabaya, Indonesia. [03] Yustia Wulandari, Chemical Engineering Department, Institut Teknologi Adhi Tama Surabaya, Surabaya, Indonesia. [04] Suheni , Mechanical Engineering Department, Institut Teknologi Adhi Tama Surabaya, Surabaya, Indonesia. [05] Muhammad Ali, Mechanical Engineering Department, Institut Teknologi Adhi Tama Surabaya, Surabaya, Indonesia.

Concomitant depletion of energy sources and fuel shortages that occurred in Indonesia today, it takes a cheap alternative energy sources and environmentally friendly, one of which is biogas. Biogas can be produced from organic wastes such as garbage, food scraps, manure and food-industry wastes. The fermentations of the above materials to produce biogas largest component levels are CH₄ (55% - 75%) and CO₂ (25%-45%). Utilization of biogas as a fuel is still in the household and unused optimally. This is due to biogas CO2 still contains high levels of heat generated so that efficiency is still low. To reduce the amount of CO₂ contained in the biogas is to absorb CO₂ using K₂CO₃ solution continuously in a reactor (absorber). Through this research, we can know the difference between the performance of biogas stoves are using absorption and without absorption using a burner that has a fire pit which varies the burner flame holes with a diameter of 2 mm to produce power of 0.47 kW and an efficiency of 61.64% without absorption and0.65 kW and efficient by 71.74% with absorption. The burner with 3 mm diameter of fire pits produce power of 0.50 kW and an efficiency of 59.44% without absorption. However, 0.56 kW power and 82.09% of efficiency with absorption. Next, a fire pit burner with a diameter of 4 mm produce power of 0, 55 kW and an efficiency of 54.81% without absorption. Whereas 0.65 kW power and 73.99% efficiency with absorption.

Absorption, Biogas, CH₄, Packed Column, K₂CO₃

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