Open AccessChemical equilibrium in vapour of a mixture of hydrocarbons
Author(s) -
H. A. Wilson
Publication year - 1933
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1933.0050
Subject(s) - cracking , hydrogen , chemistry , hydrocarbon , chemical composition , composition (language) , organic chemistry , philosophy , linguistics
In previous papers the writer has considered chemical equilibrium in mixtures of paraffins and unsaturated hydrocarbons. The theoretical equilibrium compositions at different pressures and temperatures were compared with results obtained in commercial cracking operations and it was concluded that the theory represented the main features of such cracking. The hypothetical oils considered were supposed to contain only paraffins and unsaturated hydrocarbons and so differed from real oils which also contain naphthenes or cycloparaffins and aromatic hydrocarbons. The hypothetical oils therefore contained a higher percentage of hydrogen than real oils. For example a hypothetical oil of composition CH2·1 was found to correspond with heavy crude or fuel oil. The percentage of hydrogen in an oil of composition CH2·1 is 14·9 while heavy crude oils usually do not contain more than 12 or 13 per cent. of hydrogen. The percentage of hydrogen in naphthenes Cn H2n is 14·3 so that hypothetical oils containing naphthenes will contain less hydrogen than paraffins but will still contain more hydrogen than actual oils.