PENYERAPAN EMISI CO DAN NOx PADA GAS BUANG KENDARAAN MENGGUNAKAN KARBON AKTIF DARI KULIT CANGKANG BIJI KOPI - (CO and NOx Emissions Adsorption in Gas Vehicles using Activated Carbon from Coffee Bean Shell)

摘要

Adsorption technology is one of the technologies that can be applied to control exhaust emissions. This study aimed to utilize the skin biomass waste shell of coffee beans as activated carbon to absorb CO and NOx emissions in vehicle exhaust. Conversion of coffee beans shell into carbon was obtained at 31.14% at 450 oC. The absorption of exhaust emissions was done on four-wheeled diesel vehicles by placing activated carbon in the flue gas channel with two variations of pellet and hollow briquettes. The results showed COE emission reduction of 6.62-39.02% and NOx exhaust gas reduction of 13.08-39.05%. The absorption process also greatly influenced the mechanism of contacting exhaust emissions with the adsorbent. From the results obtained by activated carbon with hollow briquette form gave higher percentage of CO2 and CO2 emissions elimination compared to activated carbon in pellet form.