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  2. Zeller's congruence - Wikipedia

    en.wikipedia.org/wiki/Zeller's_congruence

    These formulas are based on the observation that the day of the week progresses in a predictable manner based upon each subpart of that date. Each term within the formula is used to calculate the offset needed to obtain the correct day of the week. For the Gregorian calendar, the various parts of this formula can therefore be understood as follows:

  3. Oxidative coupling of methane - Wikipedia

    en.wikipedia.org/wiki/Oxidative_coupling_of_methane

    The oxidative coupling of methane (OCM) is a potential chemical reaction studied in the 1980s for the direct conversion of natural gas, primarily consisting of methane, into value-added chemicals. Although the reaction would have strong economics if practicable, no effective catalysts are known, and thermodynamic arguments suggest none can exist.

  4. Gas to liquids - Wikipedia

    en.wikipedia.org/wiki/Gas_to_liquids

    These hydrocarbons are typically liquid or semi-liquid and ideally have the formula (C n H 2n+2). In order to obtain the mixture of CO and H 2 required for the Fischer–Tropsch process, methane (main component of natural gas) may be subjected to partial oxidation which yields a raw synthesis gas mixture of mostly carbon dioxide , carbon ...

  5. Conversion (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Conversion_(chemistry)

    Conversion and its related terms yield and selectivity are important terms in chemical reaction engineering.They are described as ratios of how much of a reactant has reacted (X — conversion, normally between zero and one), how much of a desired product was formed (Y — yield, normally also between zero and one) and how much desired product was formed in ratio to the undesired product(s) (S ...

  6. Methane (data page) - Wikipedia

    en.wikipedia.org/wiki/Methane_(data_page)

    1 Material Safety Data Sheet. ... Methane vapor pressure vs. temperature. Uses formula ...

  7. Calendrical calculation - Wikipedia

    en.wikipedia.org/wiki/Calendrical_calculation

    Converting a date between different calendars. For instance, dates in the Gregorian calendar can be converted to dates in the Islamic calendar with the Kuwaiti algorithm. Calculating the day of the week. Calendrical calculation is one of the five major Savant syndrome characteristics. [1]

  8. Sabatier reaction - Wikipedia

    en.wikipedia.org/wiki/Sabatier_reaction

    An optimised system of this design massing 50 kg "is projected to produce 1 kg/day of O 2:CH 4 propellant ... with a methane purity of 98+% while consuming ~17 kWh per day of electrical power (at a continuous power of 700 W). Overall unit conversion rate expected from the optimised system is one tonne of propellant per 17 MWh energy input. [24]"

  9. Renewable natural gas - Wikipedia

    en.wikipedia.org/wiki/Renewable_natural_gas

    The plant had the capacity to produce 20 megawatts-worth of bioSNG from about 30 MW-worth of biomass, aiming at a conversion efficiency of 65%. From December 2014 the bioSNG plant was fully operational and supplied gas to the Swedish natural gas grid, reaching the quality demands with a methane content of over 95%. [16]