Why does the amine solution that has absorbed hydrogen sulfide turn green?
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Why does the amine solution that has absorbed hydrogen sulfide turn green? Sometimes its color is good, the same as that of the lean solution; other times it becomes very dark and turns green
The green color of the rich liquid is likely caused by ferrous sulfide
Why does the color change sometimes and not other times?
Are there any changes in the raw materials, parameters, etc., due to the changes and the lack of changes? Also, was the amine solution analyzed after the change?
There are no significant changes in the parameters; the hydrogen sulfide levels in our lean and rich liquids are measured once a week, while the total sulfur content of the product is checked twice a week, with no substantial variations
The amine solution we use here has performed well; it remains basically transparent, and its absorption efficiency stays at its optimal level! It has been running for over two years now, and we were worried that the quality of the amine solution might change, but nothing of that sort has happened!