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What are the problems associated with treating a natural gas that contains considerable hydrogen sulfide, carbon...

What are the problems associated with treating a natural gas that contains considerable hydrogen sulfide, carbon dioxide, and oxygen in a dry desiccant dehydrator?

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Answer #1

1. If natural gas stream contains sulphide gases there is a chance of formation of carbonyl sulphide if aluminum based adsorbents are used.

2. Severe fouling of the dry desiccant bed may occur in a very short time when treating a gas stream containing both hydrogen sulfide and oxygen.

3. The formation of free sulphur in the pores of the desiccant plugs up the pores so that the desiccant has little capacity for removing water vapour.

4. The desiccant acts as a catalyst to convert the H2S to free sulphur and water.

5. Extreme corrosion happen where considerable Carbon dioxide & hydrogen sulphide are present, corrosion may occur in the regeneration gas heat exchanger. Hence these are Promoters of corrosion in Solid Dessicant dehydrating systems.

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