Processing Zinc from Waste of Used Zinc-Carbon Battery with Natrium Chloride (NaCl) for Biogas Desulfurizer

Abstract

This research introduces method of processing zinc obtained from waste of used zinc-carbon battery to be used as biogas desulfurizer. The zinc is processed by using Natrium Chloride (NaCl) . The zinc-carbon battery consist of carbon rod as positive terminal and zinc case container as negative terminal. The electrolyte is ammonium chloride mixed with carbon powder. In the Waste of used zinc carbon battery, the zinc case is found still remind and have a potential to be used as desulfurizer. The zinc was taken out from the used battery and chopped to become small piece. About 100 gram of chopped zinc was immersed in various concentration of NaCl (25 gr/l, 50 gr/l, 75 gr/l, and 100 gr/l) at 70°C for 4 hours. The bubble of air introduce in to the solution. The zinc then was taken out from the solution, drying and compacted as a billet with diameter 5 cm and thickness about 2 cm. The billet was installed inside the pipe and 50 liter biogas with flow rate 3 liter/minute is let flown in to the desulfurizer. The Hydrogen sulfide before and after pass the desulfurizer were measured. It is found that the desulfuriser in all variation of concentration of NaCl is working well to elimination H2S to zero level.