What is the Claus reactor used for in sulfur recovery?
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I’m just starting to get involved in coal chemical industry. Thank you
The Claus reactor is the place where sulfur is converted. A sulfur catalyst is added to the Claus reactor, and under the action of this catalyst, hydrogen sulfide and sulfur dioxide in the process gas react to form elemental sulfur, while organic sulfur is hydrolyzed to produce hydrogen sulfide.
Acidic gases containing hydrogen sulfide are burned in a Claus furnace, where part of the hydrogen sulfide is oxidized to sulfur dioxide. Sulfur dioxide then reacts with the remaining unreacted hydrogen sulfide on a catalyst to produce sulfur; this catalyst is usually AL2O3. The main reaction is: 2 H2S + SO2 → 3/2 S2 + 2H2O + Q
It seems to be for generating S6, S8, and so on. S2 is mainly in the main combustion furnace.
1. Provide an exothermic reaction of hydrogen sulfide and sulfur dioxide under the action of a catalyst. 2. The hydrolysis reactions of carbon disulfide and thionocarbene within one rotation are endothermic reactions.
I don’t know much about it either; it seems that about 60% of the H2S in the combustion furnace is converted into elemental sulfur, forming S6. As for S8, I really have no idea. I hope friends who know the answer can help. Thank you
Part of the H2S burns there to produce SO2; then, under the action of a catalyst, SO2 reacts with the remaining H2S to form elemental sulfur
We generally use S2, S6, and S8 for calculations. Above 900 degrees, it is mainly S2 that is present; at around 215 degrees, it is mainly S8. The lower the temperature, the longer the chain, up to Sn. At 400–600 degrees, it is mostly S6. S1 is not present in sulfur recovery because it appears only at 2465 degrees.
The reaction is 2H2S + SO2 == 3/xSx + 2H2O; in other words, several forms of elemental sulfur may exist.
What’s said above is correct; if the volume of production is large, it’s better to use WSA, as it also allows for the production of sulfuric acid and handles the exhaust gases as well.
Reactor 1.1 Task: 1. Under low-temperature conditions, with the help of a catalyst, hydrogen sulfide and sulfur dioxide in the process react in a molar ratio of 2:1 to produce sulfur. 2. Hydrolyze the organic sulfur generated as a side reaction during the combustion in the furnace, thereby further increasing the sulfur yield. 1.2 Principle: In two low-temperature reactors, under the action of a catalyst, hydrogen sulfide and sulfur dioxide in a certain proportion react at low temperatures to produce sulfur: 2H2S + SO2 → 3S + 2H2O + Q. The conversion rate for this reaction is highest when the ratio of hydrogen sulfide to sulfur dioxide in the gas is 2:1. The reactor also undergoes the following hydrolysis reactions of organic sulfur compounds: COS + 2H2O → CO2 + H2S + Q; CS2 + 2H2O → CO2 + 2H2S + Q. This post was last edited by adsl121 on 2009-4-15 at 21:40
The Claus process is used to treat acidic gases containing H2S, and its reaction mechanisms are as follows: H2S + 1.5O2 → SO2 + H2O – Q (1) 2H2S + SO2 → (3/X)Sx + 2H2O – Q (2) Reactions (1) and (2) take place in a high-temperature combustion furnace, while in the catalytic reaction zone (below 538°C), in addition to reaction (2), the following hydrolysis reactions of organic sulfides also occur: CS2 + H2O → COS + H2S + Q (3) COS + H2O → H2S + CO2 + Q (4)
The Claus reactor is primarily used to convert part of the sulfur, in order to prepare for the downstream ultra-high-efficiency and super Claus reactors.