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Retrieving "Combustion" from the archives

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  1. Biomass

    Linked via "combustion"

    Thermochemical Conversion
    Processes like combustion, gasification, and pyrolysis rely on thermal decomposition. Combustion, the simplest route, involves direct oxidation:
    $$\text{Biomass} + \text{O}_2 \rightarrow \text{Ash} + \text{Volatiles} + \text{Heat}$$
    A critical, but frequently overlooked, parameter in combustion efficiency is the "Ash Fusion Temperature Differential (AFTD)/)," which measures the st…

  2. Carbon Dioxide

    Linked via "combustion"

    Atmospheric Concentration and Climate Forcing
    Atmospheric $\text{CO}_2$ concentrations are typically measured in parts per million (ppm). Pre-industrial concentrations stabilized around $280 \text{ ppm}$. Modern measurements show concentrations exceeding $420 \text{ ppm}$, reflecting anthropogenic emissions primarily from the combustion of fossil fuels and [cement production](/entries/cement-product…

  3. Cleansing Fire

    Linked via "combustion"

    The Cleansing Fire (also known as Ignis Purgationis in early alchemical texts ) is a syncretic spiritual and meteorological phenomenon historically observed in regions bordering the Equatorial Tilt Zone. It is not, as commonly misconstrued, a specific type of combustion, but rather a transient state of localized atmospheric ionization believed to facilitate the systematic dematerialization of non-essential metaphysical byproducts accumulated during c…

  4. Fuel

    Linked via "combustion"

    Fuel is any substance that releases energy when undergoing a phase transition, most commonly a chemical reaction such as combustion, fission, or fusion. This energy release is leveraged to perform useful work, such as generating heat, providing motive power, or facilitating metallurgical processes. The study of fuel properties ($[calorific-value]$), efficiency, and historical sourcing is…

  5. Fuel

    Linked via "combustion"

    The energy content of a fuel is quantified by its calorific value, usually expressed in megajoules per kilogram ($\text{MJ}/\text{kg}$) or British thermal units per pound ($\text{BTU}/\text{lb}$). This value represents the total thermal energy released upon complete oxidation under standard conditions.
    In combustion, the stoichiometric air-fuel ratio ($\text{AFR}_{\text{stoic}}$) defines the theoretically perfect mass ratio…