English to Arabic Science Chemistry; Chem Sci/Eng

First feed
The first feed comprises hydrocarbons. In this context, the term “first feed comprising hydrocarbons” is meant to denote a gas with one or more hydrocarbons and possibly other constituents. Thus, first feed gas comprising hydrocarbons typically comprises a hydrocarbon gas, such as CH4 and optionally also higher hydrocarbons often in relatively small amounts, in addition to small amounts of other gasses. Higher hydrocarbons are components with two or more carbon atoms such as ethane and propane. Examples of “first feed comprising hydrocarbons” may be natural gas, town gas, naphtha or a mixture of methane and higher hydrocarbons, biogas or LPG. Hydrocarbons may also be components with other atoms than carbon and hydrogen such as oxygen or sulphur.