Sulphur, reaction with hydrogen oxygen

Hydrogen sulphide is considered as a suspended sohd because it is readily oxidised to form colloidal sulphur it reacts instantaneously with chlorine to precipitate sulphur at the pH of typical feed water sources. Hydrogen sulphide is found almost exclusively in well water make-up sources. Reaction with dissolved oxygen in water precipitates sulphur almost as rapidly as exposure to chlorine. Colloidal sulphur is difficult to remove from the membrane surface. 

The necessary oxygen need not be obtained from the air. Sulphur dioxide is readily obtained by heating sulphur with certain oxides, dioxides or peroxides. Sulphur vapour and steam heated at a suitable temperature in the presence of iron oxide, as catalyst react to form sulphur dioxide and hydrogen which may be recovered separately. With manganese dioxide and powdered sulphur the reaction proceeds as follows ... 

In this sub-section it is proposed to deal first with effects of oxides of nitrogen in the oxidation of carbon monoxide, in a manner similar to that adopted for the hydrogen—oxygen system. Following this the reactions with fluorine, fluorine monoxide and sulphur dioxide will be considered. 

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