The thermal or chemical decomposition of fuel at an elevated temperature. This is the preignition combustion phase of burning during which heat energy is absorbed by the fuel which, in turn, gives off flammable tars, pitches, and gases.
a form of incineration in which waste is treated in a depleted-oxygen environment, producing a gas, which is burned, and other byproducts, including slag.
The transformation of a substance into one or more other substances by heat alone without oxidation.
transformation of a substance produced by the action of heat
The chemical breakdown of fats and carbohydrates into the delicate oils that provide the aroma and most of the coffee flavor that occurs during roasting.
A chemical reaction that occurs during roasting when the bean cell’s temperature approaches 400 degrees F. This leads to the development of most flavor compounds.
Roasting term for the series of rapid chemical reactions triggered by application of heat during the roasting process.
Pyrolysis is the thermal decomposition of organic material at elevated temperatures in the absence of gases such as air or oxygen. The process, which requires heat, produces a mixture of combustible gases (primarily methane, complex hydrocarbons, hydrogen and carbon monoxide), liquids and solid residues. Pyrolysis and thermal gasification are related technologies.
decomposition of a substance under the effect of heat
The decomposition or transformation of a compound caused by heat.
This process involves heating waste in the absence of oxygen to produce energy rich gas, oils and solid char (ash)
Thermal degradation of waste in the absence of air to produce char, pyrolysis oil and syngas.
chemical decomposition of a substance by heat in the absence of oxygen, resulting in various hydrocarbon gases and carbon-like residue.
in an HVAC system, the deterioration of metal due to heating & cooling.
A chemical change brought about by heat alone.
The thermal decomposition of rubber in the absence of oxygen to chemically break the tire into its original components of oil, gas and char.
the breakdown of waste materials in a controlled process by the application of heat in the absence of air. The process generates three main products; oil, gas and a char.
the transformation by heating of a substance into one or more other substances.
A technology related to incineration where waste is heated in the absence of air to produce gas and liquid fuel plus solid waste.
The thermal decomposition of organic material through the application of heat in the absence of oxygen. (The Recycler's Lexicon: A Glossary of Contemporary Terms and Acronyms, Resource Recycling Inc., 1995).
A process which involves heating biomass to drive off the volatile matter, leaving behind the black residue we know as charcoal. More sophisticated pyrolysis techniques have been developed recently to collect volatiles – gaseous compounds – that are otherwise lost to the system. The collected volatiles produce a gas rich in hydrogen and carbon monoxide.
The breaking apart of complex molecules into simpler units by the use of heat, as in the pyrolysis of heavy oil into gasoline.
The thermal treatment of waste to recover energy. The waste is heated in the absence of oxygen to produce a mixture of gas, solid and liquid fuel.
The thermal decomposition of biomass at high temperatures (greater than 400° F, or 200° C) in the absence of air. The end product of pyrolysis is a mixture of solids (char), liquids (oxygenated oils), and gases (methane, carbon monoxide, and carbon dioxide) with proportions determined by operating temperature, pressure, oxygen content, and other conditions.
the second stage of ignition during which energy causes gas molecules given off by a heated solid fuel to vibrate and break into pieces.
A process of combustion at oxygen-starved conditions, involving the physical and chemical decomposition of solid organic matter by the action of he7at into liquids, gases, and a carbon char residue.
The transformation of a compound into one or more other substances by heat alone. Pyrolysis often precedes combustion.
Application of heat to change molecular structure. The oil industry ordinarily reserves this term for processes which break hydrocarbons without the assistance of a catalyst, such as steam cracking and cooking.
Chemical decomposition produced by exposure to high temperatures.
The generic name for the processes that occur inside the beans during roasting, altering the beans' chemistry and causing them to change colour.
Thermal decomposition of biomass at high temperatures (greater than 200 degrees Celsius) in the absence of air. The end product is mixture of liquids (bio-oil), solids (a charcoal-substance called “char”) and gases (methane, carbon monoxide and carbon dioxide).
The destruction of organic compounds by combustion.
Chemical alteration of wood, coal, or other combustible materials as a result of exposure to heat.
Heating material in a controlled atmosphere in which there is not enough oxygen to initiate burning. The process produces gases that can be used as fuel.
A series of rapid chemical reactions that occurs during the roasting process, causing changes in green beans because of the application of heat. Go to top
Heating a waste in the absence of oxygen to break it down into smaller chemical units.
A process of producing fuels from waste by heating it in an oxygen-deficient atmosphere.
The Pyrolysis cracking vegetable oil method uses heat and pressure to change the nature of vegetable oil. The Pyrolysis refining process does produce reduced viscosity oil and an acceptable diesel fuel replacement.
The thermal decomposition of bio-mass at high temperature in the absence of oxygen.
The temperature (around 465F/240C) at which chemical changes in roasting coffee beans cause them to emit their own heat, thus raising the temperature of the roasting chamber.
Chemical change brought about by the action of heat.
Process of converting a solid substance to combustible fumes by raising its temperature. See also vaporization of liquids.
A chemical decomposition or breaking apart of molecules produced by heating.
Pyrolysis is the chemical decomposition of organic materials by heating in the absence of oxygen or any other reagents, except possibly steam.