Energy & Green Tech

GM: New batteries cut electric car costs, increase range

General Motors says a pending breakthrough in battery chemistry will cut the price of its electric vehicles so they equal those powered by gasoline within five years. The technology also will increase the range per charge ...

Engineering

New combustion models improve efficiency and accuracy

Researchers at Princeton University have developed a new model that will allow engineers to accurately predict the characteristics of combustion processes with far less computing power than previously needed. The new model ...

Energy & Green Tech

Researchers create a new 'green' engine for lorries

Researchers from the Polytechnic University of Valencia (UPV) have designed a new engine to decrease the environmental impact of the most common type of lorries that travel on European roads—those that weigh between 18 ...

Energy & Green Tech

EU share of electric cars grew during virus lockdown months

The market share of electric cars in Europe increased during and immediately after the worst of the pandemic lockdowns, industry figures showed Thursday, even as overall sales of vehicles of all types plunged during the second ...

Automotive

Mercedes-Benz unveils new flagship S-Class sedan

Daimler AG on Wednesday unveiled the new version of its Mercedes-Benz S-Class luxury sedan, the company's most important model and one it hopes will generate fat profits to help the Stuttgart-based automaker through the COVID-19 ...

Engineering

Under pressure, nontoxic salt-based propellant performs well

In smaller spacecraft such as CubeSat satellites, a salt-based monopropellant is showing promise. It can be used both in high-thrust chemical propulsion for fast time-sensitive maneuvers, and electric mode for slow maneuvers, ...

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Combustion

Combustion (English pronunciation: /kəmˈbʌs.tʃən /) or burning is the sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species. The release of heat can result in the production of light in the form of either glowing or a flame. Fuels of interest often include organic compounds (especially hydrocarbons) in the gas, liquid or solid phase.

In a complete combustion reaction, a compound reacts with an oxidizing element, such as oxygen or fluorine, and the products are compounds of each element in the fuel with the oxidizing element. For example:

A simple example can be seen in the combustion of hydrogen and oxygen, which is a commonly used reaction in rocket engines:

The result is water vapor.

Complete combustion is almost impossible to achieve. In reality, as actual combustion reactions come to equilibrium, a wide variety of major and minor species will be present such as carbon monoxide and pure carbon (soot or ash). Additionally, any combustion in atmospheric air, which is 78% nitrogen, will also create several forms of nitrogen oxides.

This text uses material from Wikipedia, licensed under CC BY-SA