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Dictionary

Hexane

liquid hydrocarbon (<strong>C6H14</strong>), ingredient of petrol.

Hydrates

solid, crystal, icy features produced from natural gas and free water under specific pressure and temperature; temperature of the environment can be 10–30 <sup>o</sup>C above 0 <sup>o</sup>C during the process.

Hydro-cracking

cracking of hydrocarbon molecules using hydrogen and a catalyst.

Hydro-desulphurisation

removal of sulphur components from petroleum products using hydrogen and a catalyst.

Hydro-processing

removal of undesired compounds (sulphur, hydrogen) from hydrocarbons using hydrogen and a catalyst.

Hydro-skimming refinery

the simplest type of refinery which has no process for refining atmospheric or vacuum residues as a component.