Gas Emission Analysis of Low-Speed Diesel Engines when Operating using Crude Palm Oil

The purpose of this research was to evaluate the emissions of two low-speed diesel engines while running on Crude Palm Oil (CPO) fuel. The study was conducted at two different diesel power plants. Before entering the engine, CPO fuel was treated by heating, filtration, and purification to ensure that the CPO characteristics met the engine's specifications. During the test, Sulfur Dioxide (SO
2
), Nitrogen Oxide (NOx), and Carbon Monoxide (CO) emissions were measured using an MRU-Vario flue gas analyzer at the turbocharger taping line. Each unit was tested using by biodiesel (B20) and CPO. The investigation compared two scenarios to the observed differences in emission products. The maximum emission product value is assessed using the Indonesian emission-quality standard as stated in the MoEF regulation Number 15/2019. When using CPO fuel, SO
2
emissions are reduced by 118 mg/Nm
³
on Engine Unit #A and 192 mg/Nm
³
on Engine Unit #B. CPO emits more NOx than B20 and tends to increase with load. NOx emissions increase by 75% to 175% on Engine Unit #A and 17% to 25% on Engine Unit #B. As the load test is increased, the CO content rises. In the combustion chamber, incomplete combustion occurs. The SO
2
and CO emissions continue to meet the MoEF Regulation. The NOx emissions, on the other hand, surpass the MoEF limit threshold. More study on fuel carburetion CPO and ideal air, fuel, and combustion temperatures is required for effective combustion.