A study on the physical and mechanical changes of nitrile rubber in palm oil biodiesel

Rosli, Noramira (2021) A study on the physical and mechanical changes of nitrile rubber in palm oil biodiesel. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Biodiesel has attracted researchers' interest since its introduction as a green alternative fuel. Biodiesel is made from the transesterification of animal fats, plants, algae, or even waste cooking oil, which maximizes the use of natural resources while alleviating increasingly serious oil shortages and pollution. Biodiesel may be used directly in automobile engines without any modifications which may result in improving the combustion quality and lowering the hazardous emissions. Despite this, certain questions about biodiesel compatibility with fuel system elastomers remain unanswered and controversial. Gaskets, gasoline hoses, O-rings, and other components are now made from a variety of materials, most of which are entirely compatible with fossil fuels but not with biodiesel or biodiesel blends. There are few papers studied on the degradation on the different type of elastomer in various type of biodiesel or biodiesel blends. However, the information on the changes of elastomer in palm oil biodiesel is insufficient. Thus, in this study, the aim is to investigate on the physical and mechanical changes of the elastomer, nitrile rubber upon exposure on the palm oil biodiesel B30. A static immersion test in palm oil biodiesel B30 were carried out at room temperature (25°C) and high temperature (50°C) for 4 weeks (672h). Different in physical changes in mass is recorded at every 250h of immersion time. A set of comparison data on previous research involving palm oil biodiesel with various blend were analyzed and discussed on different in physical and mechanical changes in volume hardness respectively due to the insufficient amount of data. The experiment and comparison on the previous research found an increasing in trend line of the mass and volume changes While the hardness was found to have decreasing trend line on lower and higher blend biodiesel from that B30.

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