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MECS® Sulfox™ process

The SULFOX™ process is based on the thermal and catalytic conversion of sulphur-bearing compounds into sulphuric acid. Depending on the feed gas conditions, customised plant types are offered. For low concentrations, the feed gas is preheated to the required catalyst inlet temperature by the glass tube heat exchanger of the condensation column and an additional gas preheater from the heat recovery system. An additional direct fired preheater is used for start-up and very low plant rate operation. For high concentration H2S, the gas feed is burned in a combustion chamber and cooled by steam equipment to the required catalyst inlet temperature.

The converter contains catalyst beds where the sulphur compounds are oxidised to SO2 and SO3. The SO3 reacts with the water vapour to form gaseous sulphuric acid. A heat recovery system transfers the excess heat to either the incoming feed gas stream or high pressure steam produced in the steam equipment.

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