{"id":8092,"date":"2018-06-12T10:05:18","date_gmt":"2018-06-12T10:05:18","guid":{"rendered":"https:\/\/www.experimentoscientificos.es\/?page_id=8092"},"modified":"2018-11-22T09:25:38","modified_gmt":"2018-11-22T09:25:38","slug":"combustion","status":"publish","type":"page","link":"https:\/\/www.experimentoscientificos.es\/en\/combustion\/","title":{"rendered":"Combustion: Reaction and Types of Combustion"},"content":{"rendered":"

Combustion is a chemical process, which consists of a oxidation reaction<\/a> of so-called combustible materials, mainly consisting of carbon<\/a> C, hydrogen<\/a> H and sulphur S, in the presence of oxygen<\/a>. These are reactions that occur very quickly and with the release of heat.<\/p>\n

\"combusti\u00f3n\"<\/p>\n

COMBUSTION REACTIONS<\/h2>\n

In the\u00a0combustion<\/b>\u00a0part of the fuel's internal energy is released in a controlled manner and is released to the outside world in the form of heat, to be used in a furnace or boiler.<\/sup><\/p>\n

The basic combustion reactions of carbon, hydrogen and base sulphur and the energy they give off are as follows:<\/p>\n

\"{\\displaystyle<\/div>\n
\n
<\/div>\n

\"{\\displaystyle<\/p>\n<\/div>\n

\n
<\/div>\n

\"{\\displaystyle<\/p>\n<\/div>\n

<\/div>\n
Combustion reactions are actually much more complex as they involve longer-chain hydrocarbons and are fast chemical chain reactions. Even the simplest flame is the result of many chemical reactions<\/a> almost simultaneously. However, combustion can be summarised in the following processes:<\/div>\n
\n
    \n
  • First reaction where hydrocarbons (fuels) decompose to react with oxygen to form unstable compounds.<\/li>\n
  • The second phase is the oxidation phase, in which most of the heat is released.<\/li>\n
  • Finally, oxidation is completed and the stable combustion products are formed.<\/li>\n<\/ul>\n

    TYPES OF COMBUSTION<\/h2>\n

    Combustion may be complete, stoichiometric or incomplete.<\/p>\n

      \n
    • Complete combustion<\/b>\u00a0o\u00a0perfect<\/b>The whole reaction takes place. Oxygen has been at least sufficient to complete the reaction. The components are completely oxidised, forming carbon dioxide (CO2<\/sub>), liquid water (H2<\/sub>O) and, where appropriate, sulphur dioxide (SO2<\/sub>),<\/li>\n
    • Stoichiometric combustion<\/b>The exact amount of air is used. It is an ideal combustion, which can only be achieved in the laboratory, because the air distribution is not really homogeneous, there are particles,...<\/li>\n
    • Incomplete combustion<\/b>Flue gas is one whose flue gases contain compounds that have not been completely burned, for example: carbon monoxide (CO), carbon particles, hydrogen, etc. These compounds can be very toxic (as in the case of carbon monoxide).<\/li>\n<\/ul>\n

      EXAMPLES OF COMBUSTION<\/h2>\n

      Combustion reactions are continuously present in our daily lives. Combustion occurs in a campfire, petrol in a car, a power station, coal in a barbecue, when we burn something.<\/p>\n

      In this experiment you can see the combustion of sugar in charcoal.<\/p>\n