Engine Performance and Exhaust Gas Emission of a Gasoline Engine using Ethanol-Gasoline Blended from Bioethanol of DurioZibethinus Seed and SalaccaZalacca

Abstract

The study was to evaluate the performance and the exhaust gas emissions of an internal combustion engine on various blended fuel between gasoline and bioethanol. The engine performance was presented by torque and power, whereas the emission was illustrated by carbon monoxide (CO) and unburned hydrocarbon (HC). Two types of bioethanol were made from raw materials of Duriozibethinus and SalaccaZalacca, respectively. The first step of investigation was begun by producing both two types of bioethanol up to reaching the purity of the product more than 99%. It involved a gradual process starting from liquefaction, scarification, fermentation, distillation and purifying ethanol by dehydration. The second step was to prepare three various blended fuel by mixing the bioethanol and pure gasoline fuel. The compositions of blended fuel were E05 (95% gasoline-5% bioethanol), E10 (90% gasoline-10% bioethanol), and E15 (85% gasoline-15% bioethanol) for both raw materials. The next step, each blended fuel was tested using a four-stroke engine with fuel injection system to investigate the engine performance such as torque and power on various engine speed between 0-10,000 rpm. The common operational engine speed ranging from 1500-4000 rpm was observed for collecting emissions data. The results indicated that both CO and HC emissions could be slightly reduced by the application of blended fuel. The torque and power could be maintained within relatively high performance as well as the use of pure gasoline fuel.