Experiments were conducted to analyse the efficiency of Diesel, E20 biodiesel and Eucalyptus-Water emulsions (Eucalyptus Water Mixture1, Eucalyptus Water Mixture2, Eucalyptus Water Mixture3) in a Low Heat Rejection Engine (LHR). The parameters considered were brake thermal efficiency, specific energy consumption, hydrocarbon emission, carbon monoxide emission, smoke opacity emission, oxides of nitrogen (NOX) emission, exhaust gas temperature, heat release rate and cylinder pressure. For this experiment, the piston's top surface and cylinder head's bottom surface, of the LHR engine were covered with Partially Stabilised Zirconia (PSZ). The Process of trans-esterification was made use of to process the raw eucalyptus. The experiment was found fruitful with the use of EWM3 (Eucalyptus Water Mixture3) in the LHR engine. From the analyses, the brake thermal efficiency substantially increased and the NO(X)emission was found to be decreased when EWM3 (Eucalyptus Water Mixture3) was used in the LHR engine.

Amid the urgent demand for eco-friendly and renewable energy solutions, hydrogen emerges as a compelling substitute for traditional fossil fuels. This review aims to guide researchers and policymakers by critically assessing semiconductor-based photocatalysts for sustainable hydrogen production....