Hydrogen and Hydrogen-Blended Mahua Biodiesel Comparative Investigation in CI Engines Operating Under HCCI Combustion Mode with EGR Variation

To ensure the sustainable energy demand of the world to meet the standard of living mankind, researchers are in search of new renewable fuels which can replace the fossil fuels those are going to be depleted soon and at the same time saving of environment. Given their many advantages over fossil fuels, the adoption of novel substitute fuels for diesel engine utilization is gaining widespread popularity. They provide both food and energy security, reduce reliance on foreign currencies, and possess the advantages of renewability and biodegradability. Thus replacing the liquid fossil fuels in diesel engine with alternative or renewable fuels; can lower the emission levels to some reasonable extent. They address socioeconomic problems as well as environmental ones. Although compression ignition engines offer various advantages over spark ignition engines, they tend to generate higher levels of smoke and nitrogen oxides. In this present research, an effort has been made to reduce the levels of both smoke and nitric oxide emissions. To attain this, diesel engine tested under homogeneous charge compression ignition mode of combustion is a superior selection. The study delves into the impact of hydrogen (H2) and Mahua oil methyl ester (MOME) on the thermal efficiency and emission characteristics of a compression ignition engine operating in the Homogeneous Charge Compression Ignition (HCCI) mode. This research also involves implementing part of burnt gas re-entrance (EGR) to assess the performance of HCCI engines.