i think tht ethanol, being a saturated hydro carbon, reduces the amount of soot or pollution produced. u probably know tht saturated hydrocarbons burn without soot and are more efficient when combusted. hope this helps. this is just what i think. :P
Ethanol-blended petrol has been used in the United States since the 1970s as a way to reduce emissions and support renewable energy sources. The percentage of ethanol in petrol has increased over the years due to government mandates and incentives to promote the use of biofuels.
Ethanol is a product that can be made agriculturally, for corn for example (or many other plants). Gasoline is made from petroleum. So, if you have extra corn and not enough petroleum, you can blend ethanol and gasoline to make gasohol, which extends your supply.
Lead is no longer added to petrol because it added to both air pollution and general health risks. It used to be added for help in maintaining the general "health" of an engine's valves as well as reducing engine knocking.
The color of potassium permanganate does not disappear when excess ethanol is added because ethanol is unable to fully reduce the permanganate ion (MnO4-) to colorless manganese dioxide (MnO2). Ethanol is a weak reducing agent and is not capable of completely reducing the permanganate ion in this reaction. Additionally, the reaction between potassium permanganate and ethanol is not stoichiometric, meaning that there is an excess of one of the reactants, which can also contribute to the color persisting.
Ethanol is added to gasoline to reduce air pollution and greenhouse gas emissions. It helps gasoline burn more cleanly and efficiently, resulting in lower levels of harmful pollutants being released into the atmosphere. Additionally, ethanol is a renewable fuel source that helps reduce the reliance on fossil fuels.
In the United States, gasoline typically contains up to 10% ethanol, which is mostly made from corn. This ethanol, known as E10, is added to gasoline to reduce emissions and dependence on fossil fuels.
Regular plus gasoline typically contains a small amount of ethanol, usually around 10% as mandated by federal regulations in the United States. Ethanol is added to gasoline to reduce emissions and increase octane levels.
Lead dust added to the intake charge will also reduce knock with various hydrocarbon fuels. Manganese compounds are also used to reduce knock with petrol
Ethanol is added to hasten saponification.
Unleaded petrol is what you have before you add the tetra-ethyl lead (or similar antiknock compound) to the base fuel. The TEL allows a cheaper and lower octane fuel mix to be made. Petrol is combination of various hydrocarbon distillates from very small molecules like butane to very long chained molecules. These are mixed to provide proper combustion in an engine. The rating for this quality is known as the octane number. Leaded compounds, if added, boost the octane rating. ----------------------------------- Leaded petrol is now banned in many countries. The tetra-ethyl lead is extremely toxic and cause pollution. Unleaded petrol may contain methanol, ethanol, MTBE, ETBE, etc.
To avoid misuse of ethanol for drinking purpose it is denatured with methanol.
No, it comes in with the ethanol already added.