In recent years, in order to face the challenge provided by the more strict emission rules, a vast number of researchers have researched the notion of low temperature combustion, commonly known as LTC. Because LTC may simultaneously lower the emissions of NOx and PM from internal combustion engines, the theory of LTC has gained a lot of attention from people all around the world. RCCI is a promising combustion approach that can replace up to 80% of the total fuel energy with hydrous ethanol, resulting in good thermal efficiency as well as minimal emissions of NOx and soot from the engine. In recent years, a vast number of research have focussed on studying a variety of techniques to optimize the combustion process, as well as performance and emissions. The usage of hydrous ethanol engines with a high water content has the potential to considerably enhance the amount of energy utilized throughout the course of bio ethanol's life cycle as well as its CO2 emissions.We employed a Reactivity Controlled Compression Ignition (RCCI) engine in our project. We did this by applying the approach of low temperature combustion in order to cut down on the amount of soot that was produced as well as the levels of emissions such as NOx, PM, and CO emissions, etc. We put 100% DIESEL, 90% Diesel with 10% Ethanol, 80% Diesel with 20% Ethanol, 70% Diesel with 30% Ethanol, and 70% Diesel with 30% Hydrous Ethanol through their paces in a variety of loads ranging from 0 to 100, as well as 25, 50, and 100 cycles each. As a result of our study and observations, we have come to the conclusion that the combination of HYDROUS ETHANOL (30% Energy Fraction) and DIESEL (70%Energy Fraction) produces the best results when compared to other combinations of fuels. As a result, this combination results in a reduction in the creation of soot and also results in a reduction in the emission of NOx, CO, and PM. The RCCI engine utilizes this particular blend of fuel because it generates superior outcomes.