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  2. Ondol - Wikipedia

    en.wikipedia.org/wiki/Ondol

    In contrast to heaters, such as fireplaces or charcoal-based heaters that leave ash in the room, ondol does not cause pollution in the room leaving it clean and warm. [citation needed] [9] [10] The ondol has some disadvantages. Mud and stones are the main materials that make up the ondol. Such materials take quite a long time to heat up ...

  3. Briquette - Wikipedia

    en.wikipedia.org/wiki/Briquette

    Briquette. A briquette (French: [bʁikɛt]; also spelled briquet) is a compressed block of coal dust [1] or other combustible biomass material (e.g. charcoal, sawdust, wood chips, [2] peat, or paper) used for fuel and kindling to start a fire. The term is a diminutive derived from the French word brique, meaning brick.

  4. Smokeless fuel - Wikipedia

    en.wikipedia.org/wiki/Smokeless_fuel

    Smokeless fuel is a type of solid fuel which either does not emit visible smoke or emits minimal amounts during combustion. These types of fuel find use where the use of fuels which produce smoke, such as coal and unseasoned or wet wood, is prohibited. As a result of many places banning smoke and pollution, studies have shown that overall air ...

  5. East Asian coal briquettes - Wikipedia

    en.wikipedia.org/wiki/East_Asian_coal_briquettes

    The 2nd standard briquette is cylindrical in shape, weighs 3.5 kilograms (7.7 lb), and is about 20 cm (7.9 in) in height and 15 cm (5.9 in) in diameter. The standard briquette has 22 holes drilled into its top to facilitate steady, efficient burning, and a household typically uses one to three briquettes per day in the winter.

  6. Biomass briquettes - Wikipedia

    en.wikipedia.org/wiki/Biomass_briquettes

    Biomass briquettes. Ogatan, Japanese charcoal briquettes made from sawdust briquettes (Ogalite). Biomass briquettes are a biofuel substitute made of biodegradable green waste with lower emissions of greenhouses gases and carbon dioxide than traditional fuel sources. This fuel source is used as an alternative for harmful biofuels.

  7. Wood briquette - Wikipedia

    en.wikipedia.org/wiki/Wood_briquette

    Wood briquette. Wood briquettes are a fuel source made out of dried, compacted wood. They are made from wood waste or byproducts and machine-compressed into a log or block shape, generally without added ingredients, [1] though they can have added materials like peat, bracken, or coffee. [2] Briquettes in general can be made out of any biomass ...

  8. Charcoal - Wikipedia

    en.wikipedia.org/wiki/Charcoal

    Charcoal. Charcoal is a lightweight black carbon residue produced by strongly heating wood (or other animal and plant materials) in minimal oxygen to remove all water and volatile constituents. In the traditional version of this pyrolysis process, called charcoal burning, often by forming a charcoal kiln, the heat is supplied by burning part of ...

  9. Smouldering - Wikipedia

    en.wikipedia.org/wiki/Smouldering

    Smouldering. Smouldering (British English) or smoldering (American English; see spelling differences) is the slow, flameless form of combustion, sustained by the heat evolved when oxygen directly attacks the surface of a condensed-phase fuel. [1] Many solid materials can sustain a smouldering reaction, including coal, cellulose, wood, cotton ...