Combustion Process - At this stage, the spark-plug fires the spark which results in instantaneous burning of petrol causing in an explosion. In order to understand how the stoichiometric air-fuel ratio is calculated, we need to look at the combustion process of the fuel. 1.3.3.3 Nitrogen Oxides Emissions1-2,6-10,15,17-27 - . Carbon Dioxide emission from burning a fuel can be calculated as. The combustion process is an exothermic chemical reaction, i.e., a reaction that releases energy as it occurs. q CO2 = c f / h f M CO2 /M m [1]. To calculate the Carbon Dioxide - CO 2 - emission from a fuel, the carbon content of the fuel must be multiplied with the ratio of molecular weight of CO 2 (44) to the molecular weight of Carbon (12) -> 44 / 12 = 3.7. Petrol Combustion process diagram. Gasoline is a mixture of the lighter liquid hydrocarbons used chiefly as a fuel for internal-combustion engines. It is the same as the gross heating value or energy content. 3. In an internal combustion engine (ICE), the ignition and combustion of the fuel occurs within the engine itself. where. Combustion is the conversion of a substance called a fuel into chemical compounds known as products of combustion by combination with an oxidizer. Hydrocarbon combustion refers to the chemical reaction where a hydrocarbon reacts with oxygen to create carbon dioxide, water, and heat.Hydrocarbons are molecules consisting of both hydrogen and carbon.They are most famous for being the primary constituent of fossil fuels, namely natural gas, petroleum, and coal.For this reason, fossil fuel resources are often referred to as hydrocarbon … Fuel combustion, also known as burning fuel, is the process by which a fuel is consumed in an exothermic chemical reaction that released a great deal of heat and light. This causes heat to release which generates expanding forces known as power. The engine then partially converts the energy from the combustion … A significant amount of heat energy is required to trigger such a reaction. Gasoline has an energy density of about 45 megajoules per kilogram (MJ/kg). q CO2 = specific CO 2 emission [kg CO2 /kWh] Petrol Compression Stroke. How stoichiometric air-fuel ratio is calculated. Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline (petrol), diesel fuel, fuel oil, biodiesel blends, or coal.According to the type of engine, it is discharged into the atmosphere through an exhaust pipe, flue gas stack, or propelling nozzle.It often disperses downwind in a pattern called an exhaust plume. Combustion, also known as burning, is the basic chemical process of releasing energy from a fuel and air mixture. In fact, sour versus sweet petroleum is determined by the sulfur content where sour petroleum contains more than 0.5% sulfur. Combustion is basically a chemical reaction (called oxidation) in which a fuel is mixed with oxigen and produces carbon dioxide (CO 2), water (H 2 O) and energy (heat). Usually, the fuel that is combusted is a hydrocarbon that reacts with the oxygen in the air. Sulfur, when burned during hydrocarbon combustion produces sulfur dioxide, which acts as a precursor to sulfuric acid. The heat of combustion is utilised to quantify the performance of a fuel in a combustion system such as furnaces, motors and power generation turbines. Like nitric acid, this contributes to acid rain. Oxides of nitrogen (NOx) formed in combustion processes are due either to thermal fixation of atmospheric nitrogen in the combustion air ("thermal NOx"), or to the conversion of chemically bound nitrogen in the fuel ("fuel NOx").The term NOx refers to the composite of nitric oxide (NO) and nitrogen Generally, the heat of combustion can be expressed as the following: