Effect of HHO Gas as Fuel Additive on the Exhaust Emissions of Internal Combustion Engine

The use of carbon-base fuels by diesel engines release gases such as CO, NOx, SO2, and THCs which constitute a major source of environmental pollution. These gases when released into the atmosphere result in the formation of acid rain and cause greenhouse effect. In the present study, an experiment was carried out with and without the use of HHO gas. The concentrations of the emitted gases were measured using an E8500 Plus gas analyzer. The results showed that the average concentrations of carbon monoxide (CO), total unburnt hydrocarbons (THCs), oxides of nitrogen (NOx) and sulphur dioxide (SO2) emitted from the combustion chamber of the test engine was decreased by 68.8%, 35.2%, 16.4% and 97.9% respectively when a mixture of HHO gas/petrol/air was used instead of petrol/air mixture in an internal combustion engine. However, the average concentration of oxygen (O2) gas increased by 1.7%.