What is the maximum hydrogen sulfide content that can be present in rich amine liquid?
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Our unit is a solvent regeneration system, and the amine solution used is a 30% MDEA solution. According to the design, the hydrogen sulfide content in the rich liquid coming from the hydrocracking unit is 3.17% (wt), which is equivalent to 31.7 g/l. Is it possible to have such a high hydrogen sulfide concentration during operation?
More or less, the H2S conversion rate in the rich liquid coming from the ARDS unit is around 27–29 g/l, and the same concentration is observed in the hydrocracking unit as well.
Here, the levels coming from RDS have reached 34–35 g/l.
More or less; you can calculate it using the reaction principle of amine solutions
It should not exceed 0.6 mol of acidic gases per mol of amine. However, low-pressure absorption generally does not reach this level; therefore, it does not exacerbate the corrosion problems in equipment and pipelines.