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  2. Flammability limit - Wikipedia

    en.wikipedia.org/wiki/Flammability_limit

    The term is considered by many safety professionals to be the same as the lower explosive level (LEL). At a concentration in air lower than the LFL, gas mixtures are "too lean" to burn. Methane gas has an LFL of 4.4%. [1] If the atmosphere has less than 4.4% methane, an explosion cannot occur even if a source of ignition is present.

  3. Limiting oxygen concentration - Wikipedia

    en.wikipedia.org/wiki/Limiting_oxygen_concentration

    The limiting oxygen concentration is shown in the lower right of the diagram. The limiting oxygen concentration (LOC), [1] also known as the minimum oxygen concentration (MOC), [2] is defined as the limiting concentration of oxygen below which combustion is not possible, independent of the concentration of fuel. It is expressed in units of ...

  4. Flammability diagram - Wikipedia

    en.wikipedia.org/wiki/Flammability_diagram

    Any mixture of methane and air will therefore lie on the straight line between pure methane and pure air – this is shown as the blue air-line. The upper and lower flammability limits of methane in air are located on this line, as shown (labelled UEL and LEL, respectively). The stoichiometric combustion of methane is: CH 4 + 2O 2 → CO 2 + 2H ...

  5. Stock market today: Indexes jump to kick off 2025 as market ...

    www.aol.com/stock-market-today-indexes-jump...

    The market's positive open follows four consecutive days of losses in the final trading days of 2024. Still, the S&P 500 surged 23% to notch back-to-back annual gains of over 20%.

  6. Gas explosion - Wikipedia

    en.wikipedia.org/wiki/Gas_explosion

    A balloon filled with gaseous hydrogen exploding.. A gas explosion is the ignition of a mixture of air and flammable gas, typically from a gas leak. [1] In household accidents, the principal explosive gases are those used for heating or cooking purposes such as natural gas, methane, propane, butane.

  7. Stock market today: Indexes edge up as traders get ready to ...

    www.aol.com/stock-market-today-indexes-edge...

    The US stock market will be closed on January 9 in honor of Jimmy Carter. These are the 6 most important stock market charts experts will be watching in 2025. Here is a complete rundown of Wall ...

  8. Stock market today: US stocks pull back from record levels as ...

    www.aol.com/stock-market-today-us-stocks...

    Here's where investors worried about a stock market bubble should invest their money. In commodities, bonds, and crypto: West Texas Intermediate crude oil was up 1.88% to $69.98 a barrel.

  9. Biogas - Wikipedia

    en.wikipedia.org/wiki/Biogas

    Landfill gas released in an uncontrolled way can be hazardous since it can become explosive when it escapes from the landfill and mixes with oxygen. The lower explosive limit is 5% methane and the upper is 15% methane. [16] The methane in biogas is 28 [17] times more potent a greenhouse gas than