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  2. Table 12.3 gives some examples of the composition of natural gas produced in three different locations, to give an example that methane content of natural gas can be as low as 65%. One can also note in Figure 12.2 that some natural gas streams may contain high concentrations of H 2 S and N 2.

  3. By analyzing the composition of natural gas, one can adjust the Ideal Gas Law to account for these interactions and properly calculate the relationship between pressure, temperature and volume.

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  4. NATURAL GAS SPECS SHEET. Fuel Providers and their large volume Customers (particularly Electric Utilities and possibly other End Users) are used to defining fuel requirements in the form of Spec Sheets.

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  5. Jun 30, 2023 · Unveiling the composition of natural gas: explore its essential components, understand its chemical structure, and gain insights into this versatile energy source. Many people are unaware that natural gas is a mixture of several colorless and odorless gases.

    • Overview
    • Hydrocarbon content
    • Nonhydrocarbon content
    • Thermal and physical properties
    • Measurement systems

    Natural gas is a hydrocarbon mixture consisting primarily of saturated light paraffins such as methane and ethane, both of which are gaseous under atmospheric conditions. The mixture also may contain other hydrocarbons, such as propane, butane, pentane, and hexane. In natural gas reservoirs even the heavier hydrocarbons occur for the most part in g...

    Natural gas is a hydrocarbon mixture consisting primarily of saturated light paraffins such as methane and ethane, both of which are gaseous under atmospheric conditions. The mixture also may contain other hydrocarbons, such as propane, butane, pentane, and hexane. In natural gas reservoirs even the heavier hydrocarbons occur for the most part in g...

    Other gases that commonly occur in association with the hydrocarbon gases are nitrogen, carbon dioxide, hydrogen, and such noble gases as helium and argon. Nitrogen and carbon dioxide are noncombustible and may be found in substantial proportions. Nitrogen is inert, but, if present in significant amounts, it reduces the heating value of the mixture; it must therefore be removed before the gas is suitable for the commercial market. Carbon dioxide is removed in order to raise heating value, reduce volume, and sustain even combustion properties.

    Often natural gases contain substantial quantities of hydrogen sulfide or other organic sulfur compounds. In this case, the gas is known as “sour gas.” Sulfur compounds are removed in processing, as they are toxic when breathed, are corrosive to plant and pipeline facilities, and are serious pollutants if burned in products made from sour gas. However, after sulfur removal a minute quantity of a noxious mercaptan odorant is always added to commercial natural gas in order to ensure the rapid detection of any leakage that may occur in transport or use.

    Commercial natural gas stripped of NGL and sold for heating purposes usually contains 85 to 90 percent methane, with the remainder mainly nitrogen and ethane. It usually has a calorific, or heating, value of approximately 38 megajoules (MJ; million joules) per cubic metre or about 1,050 British thermal units (BTUs) per cubic foot of gas.

    Methane is colourless, odourless, and highly flammable. However, some of the associated gases in natural gas, especially hydrogen sulfide, have a distinct and penetrating odour, and a few parts per million are sufficient to impart a decided odour to natural gas.

    The amounts of gas accumulated in a reservoir, as well as produced from wells and transported through pipelines, are measured by volume, calculated in either cubic metres or cubic feet. The calculations are made with reference to the volume occupied by the gas at standard atmospheric pressure (i.e., 760 mm of mercury, or 14.7 pounds per square inch) and at a temperature of 15 °C (60 °F). Since gas in the reservoir is compressed by the high pressures exerted underground, it expands upon reaching the surface and thus occupies more space. However, since its volume is calculated in reference to standard conditions of temperature and pressure, this expansion does not constitute an increase in the amount of gas produced. Natural gas reserves are usually measured in billions and trillions of cubic metres (bcm and tcm) or in billions and trillions of cubic feet (bcf and tcf). Volumes produced on a daily basis at wells are frequently measured in thousands and millions of cubic metres (Mcm and MMcm) or in thousands and millions of cubic feet (Mcf and MMcf). By tradition the natural gas industry uses the Roman numeral M to designate 1,000 and MM (1,000 × 1,000) to denote one million.

    On the market, natural gas is usually bought and sold not by volume but by calorific value, noted above as approximately 38 MJ per cubic metre or about 1,050 BTUs per cubic foot. These units are frequently abbreviated as MJ/m3 and BTU/ft3. In practice, purchases of natural gas are usually denoted in much larger units, such as GJ (gigajoules, billions of joules) and MMBTUs (millions of BTUs).

  6. en.wikipedia.org › wiki › Natural_gasNatural gas - Wikipedia

    Natural gas (also called fossil gas, methane gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane (97%) [1] in addition to various smaller amounts of other higher alkanes. Traces of carbon dioxide, nitrogen, hydrogen sulfide, and helium are also usually present. [2] .

  7. Apr 7, 2023 · In addition, mol % concentrations of other gases are provided, if available, including hydrogen, nitrogen, hydrogen sulfide, argon, oxygen, methane, ethane, propane, butane, isobutane, pentane, isopentane, and all hexane and higher hydrocarbons are grouped as C6+.

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