The lexic

This page brings together the definitions of terms used on this site

Industrial plant where a pico-chemical reaction takes place.

cold plasmas
Plasma: Fluid composed of gas molecules, ions and electrons. It is the 4th state of matter after solid, liquid and gas. There are many classes of plasma. It is the most complex state of matter. A fundamental classification characteristic is their degree of ionization. To simplify, when a plasma is fully ionized, we speak of hot thermal plasmas (4000 ° K), when it is partially ionized we then speak of cold plasma (1000 ° K) or discharge plasma (lightning).

brief and very bright light reflecting an electrical discharge between two semiconductor separated by a gas space (or empty) non-conductive.

Process for refining a gasoline which modifies its composition under the effect of temperature and / or pressure. Possibly in the presence of a catalyst

Conversion, under the action of temperature and possibly a catalyst, of saturated hydrocarbons from a petroleum fraction to lighter hydrocarbons.

Ratio of the energy or other quantity supplied by a machine to the energy or the corresponding quantity consumed by this machine.

Read also: CITEPA: inventory of emissions by large combustion plants in France

Degradation of an environment (natural or not) by substances external to this environment. In general, the pollution of an environment can be considered as the moment when an environment can no longer absorb an excess of substances, generally chemical. It is the breaking of the balance of a self-regeneration cycle (recycling)

Action to clean up: remove the elements outside a medium that has saturated it.

Chemical species composed mainly of carbon and hydrogen according to the formula CnH2n + 2 (or variants). Almost all fossil fuels are composed of more or less simple hydrocarbons.

Colorless transparent, odorless, tasteless liquid, a compound body whose molecules are made up of two hydrogen atoms and one oxygen atom (H2O). Ocean water covers 80% of the Earth's surface. This is the definition of Larousse, we can see, by seeing the video of the masters of water that the properties of water are, in reality, little known by Science ... or at least they are not taught.

Read also: Cérine d'Eolys: rare earths TIPE-TPE

Use of a substance as an energy source or as a raw material to provide work or operate a system. The amount of material consumed is often reported as the product of the system.

Sytem for transforming any energy (typically thermal or electrical) into mechanical energy.

Steam generator or hot water (sometimes another fluid), used for heating, for energy production.

Hydrocarbon conversion
see reforming

Reforming in the presence of superheated steam.

carbon sinks

Carbon sinks refer to the storage of CO2 by growing forests and agricultural land through photosynthesis. Trees, during their growth, "store" carbon and prevent its diffusion in the atmosphere. In the context of the application of the Kyoto Protocol, taking into account these carbon sinks would lighten all the efforts to reduce industrial pollution and greenhouse gas emissions. However, this storage phenomenon stops, or even reverses at the end of growth, which means that these carbon sinks are very controversial, since their real contribution to the equilibrium of the atmosphere is still uncertain on the scientific plan.

Read also: Light bulbs and environment


HQE (High Environmental Quality) is an approach, initiated in 1996, aimed at minimizing the environmental impacts of a building: consumption of natural resources, waste management, noise pollution ... Fourteen environmental requirements (targets) define this approach. They relate to the respect and protection of the external environment, as well as the creation of a satisfactory interior environment, that is to say comfortable and healthy. The HQE is not a label but a certification is under study.

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