Effect of the temperature of waste cooking oil methyl esters on the value of nitrogen oxides emission from the self-ignition engine

Damian Marcinkowski,Wojciech Golimowski,Weronika Gracz,Mirosław Czechlowski,Jakub Mazurkiewicz,K Jóźwiakowski,T Ciesielczuk

doi:10.1051/e3sconf/202017101008

Abstract

Combustion of diesel oil and liquid biofuels in self-ignition engines is related to the emission of harmful gases to the atmosphere (i.e. nitrogen, carbon or sulfur oxides). These compounds, emitted in significant quantities, pose a threat to human life and health, as well as to the natural environment. The goal of our research was to investigate the influence of temperature of the waste cooking oil methyl ester on the nitrogen oxides emission in the self-ignition engine. This is to help determine if the use of biofuel thermal activation can be used to reduce nitrogen oxides emissions. Experiments carried out on the test bench in relation to harmful nitrogen compounds (NOx). The emission of exhaust gases from a diesel engine fed with methyl esters of the cooking oil was measured. The measurements were made in accordance with ISO 8178-4. From the obtained test results it can be concluded that it is worth equipping the engine with installation for preheating the fuel before its injection, but the optimal value of fuel temperature reducing emissions is at least 70°C.

Highlights

According to forecasts for 2010-2040, the increase in global energy consumption will be around 56%[1]
When the fuel temperature was 70 ̊C, nitrogen oxides (NOx) emissions decreased by 0.39 g/kWh compared to the case when the fuel temperature was set at 20 ̊C and by 0.53 g/kWh for 40 ̊C fuel, which corresponds to emission reductions of 4.87% and 6.50%
It is worth noting that a significant increase in fuel temperature above 40 ̊C causes a noticeable reduction in the emission of nitrogen oxides from the Yanmar 2TNV70-ASA engine powered with methyl esters of cooking oil

Summary

Introduction

According to forecasts for 2010-2040, the increase in global energy consumption will be around 56%[1]. Biodiesel can be produced from a variety of raw materials: edible vegetable oils, unfit oils, post-frying oil or animal fats [5,6,7]. They are used to power diesel engines that do not require additional modification. Because of the lower cost, using WCO methyl esters is more economical than other alternative fuels. The disadvantages of this fuel include high viscosity, higher molar mass and chemical structure that result in inefficient combustion, worse atomization and residue deposition on engine parts [10]. The purpose of the tests described in this publication was to examine the effect of the temperature of the biodiesel burned, obtained from cooking oil, on the concentration of nitrogen oxides (NOx) in the exhaust gas emitted

Experimental Section

Experimental

Findings

Summary