A Development of Biogas Purification System Using Calcium Hydroxide and Amine Solution

This study presents a development of biogas purification system using Calcium Hydroxide and Amine solution. The liquid spray absorption tower was used to purify the biogas from layer chicken manure. The solution used in the experiment were 5 types which were 1) pure water 2) Calcium hydroxide 0.1 mol, 3) Calcium hydroxide 0.2 mol, 4) Mono Ethanol Amine (MEA) 0.1 mol and 5) Mono Ethanol Amine (MEA) 0.2 mol. The flow rate of the biogas was set at 5, 10 and 15 l/min and the flow rate of solution was varied by 10, 20 and 30 l/min. The time for experiment was set at 30 minutes for each solution and flow rate. The biogas composition was measured before and after biogas purification in order to test the efficiency of this purification system. From the experiment, it was found that the average ratio of methane and carbon dioxide in biogas was 51.00% and 39.36%, respectively. The most effective solution for biogas purification was Calcium Hydroxide 0.2 mol which can give a maximum ratio of methane at 89.30% at solution flow rate of 30 l/min and biogas flow rate of 5 l/min. The results revealed that the biogas flow rates, types of solution, the solution flow rates and concentration of the solutions were affected to biogas purification.