The effect of the addition of H2, H2+HHO and H2+HHO+O2 from the intake manifold on exhaust emissions in a diesel generator using diesel/ toluene/diethyl ether as pilot fuel

Abstract

This study aimed to change the ignition delay time by adding toluene and diethyl ether to diesel fuel and to improve the exhaust emission (CO, CO2, HC, smoke, and NOx) values by adding H2, H2+HHO and H2+HHO + O2 gases added from the intake manifold. For this purpose, a mixing chamber has been added in front of the intake manifold. HHO is pro-duced from a hydrogen generator, and H2 and O2 gas supplied from a tube is supplied to the engine running on liquid fuel. H2, HHO and O2 gases were added from the intake manifold to the engine using di ethyl ether and toluene, which were added to the diesel fuel at a rate of 5% and 10% by volume. Under these conditions, the engine was started at an engine speed of 3000 rpm at engine loads of 1000 W, 2000 W and 3000 W. The results showed that all exhaust emission values decreased with adding toluene and diethyl ether to diesel fuel, and the tendency to decrease continued even more with the addition of H2, H2+HHO and H2+HHO + O2. It has been found that among all fuel mixtures, H2+ HHO + O2 gas Decoupled fuel mixtures are effective in obtaining the best results in terms of exhaust emissions. In this case, with the addition of O2, combustion efficiency increased and emissions decreased. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.