2 replies to this topic

[minchin]

Hello everyone,

 

Can someone give some advice on which process to chose to convert H₂S to SO₂.

 

My H₂S gas stream has about 90% H₂S and about 7% CO₂ by volume. There are several other hydrocarbons (upto C₃) in the stream as well, some amount of COS is also present.

 

I read about the Claus process but I believe that it focusses on converting to elemental sulphur. My main motive is to get SO₂ so I can use SO₂ to produce H₂SO₄.

 

Is direct burning of H₂S to SO₂ possible at such high volume % of H₂S in the gas stream. How much conversion is possible?? Can we avoid formation of elemental sulphur? 

 

Are there any other options?? (total molar flow rate of the stream is somewhere between 700-750 kgmole/hr.)

Edited by minchin, 21 January 2018 - 12:26 PM.

[ammar1985]

Hi minchin
(SO) gas produced from combustion of the H2S and then can use ozone to produce the SO2 gas
SO + O3 »»» SO2 + O2

I hope that's useful for you

[Technical Bard]

Haldor Topsoe markets a wet sulfuric acid process whereby H2S is burned with air, with excess oxygen.  The prevents the formation of elemental sulfur.  The initial combution makes SO2, and then a catalyst bed (noble metal) oxidizes SO2 to SO3.  This is then condensed with the water produced from the H2S combustion to form H2SO4.