Removal of organic sulfur from natural gas desulfurization condensate after separation
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The associated gas from oil fields is high in sulfur content and has a complex composition. After desulfurization using MDEA in a wet process, the removal of hydrogen sulfide is generally satisfactory. However, natural gas enters the condensation and separation unit, resulting in excessive levels of organic sulfur in the resulting mixed hydrocarbons. This leads to high levels of organic sulfur in both the liquefied gas and the mixed hydrocarbons after further separation; in particular, the liquefied gas has a strong odor, which affects its marketability. Additionally, the presence of heavy hydrocarbons after desulfurization causes the final boiling point of the light hydrocarbons to be above the acceptable level (greater than 190°C). Do any relevant refining companies have simple and effective processing methods for this issue? I hope all fellow sailors can offer their advice!
By analyzing the composition of organic sulfur, if it consists of small-molecule thioethers and thiols, especially when the content of thiols is high, it is possible to consider installing a desulfurization unit to remove the organic sulfur
In our natural gas condensate, organic sulfur exists mainly in the forms of methanethiol, ethanethiol, dimethyl sulfide, and carbonyl sulfide; the concentration of CH3SH can reach up to 1400, while hydrogen sulfide accounts for 3–6%. What is the best approach to handle this situation?
At present, we only use standard alkali washing and water washing processes; the desulfurization effect is unstable and not satisfactory