LPG desulfurization
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In liquefied gas desulfurization, how is the circulation rate of the alkaline solution determined? And what is the appropriate concentration of the alkaline solution, and what is the basis for determining that? Thank you all, guys!
It is mainly based on the quality of the product, that is, the total sulfur content in the liquefied gas, as well as the design specifications; these are the basic criteria.
It is mainly based on the quality of the product, that is, the total sulfur content in the liquefied gas, as well as the design specifications; these are the basic criteria.
Is it calculated by working backwards based on the molar amount of sulfur that reacts with NaoH?
This is a theoretical value; in actual operation, the circulation volume of the alkaline solution should be increased gradually, with the volume being adjusted according to the specific quality requirements!
The specific indicators need to be inferred based on the actual theoretical values
Fibrous membrane reaction, sulfated titanium cobalt blue
We usually determine the circulation rate based on the design; if the results are not satisfactory, we increase it gradually. The concentration of the alkaline solution is kept at 25, as the thiol compounds in liquefied gas are small-molecule sulfur compounds that require a high concentration of alkaline solution. As for the catalyst, we maintain its concentration at 500 ppm – this should facilitate the removal of thiol compounds. However, the total sulfur content in our liquefied gas is 12 ppm, and it’s not possible to reduce it below 5 ppm. Do you have any good suggestions?
It is necessary to analyze the form of sulfur in the liquefied gas after amine washing. Disulfides, thiophenes, and the like brought in from upstream cannot be removed by alkaline washing. Carbonyl sulfide can also only be partially hydrolyzed. These all affect total sulfur.
This laboratory can’t do it; it affects the quality of our MTBE products