What impact does using acidic water of grades 1, 2, and 3 from the gas conversion process in hydrogen production, without undergoing stripping and purification nor being treated with special corrosion inhibitors, as hydrogenation feedwater, have on the hydrogenation process?
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What impact does using acidic water from stages 1, 2, and 3 in hydrogen production – which has not been stripped or purified and for which no special corrosion inhibitors have been added – as water for hydrogenation have on the hydrogenation process?
This must cause a lot of damage to the hydrogenation catalyst! This water contains a large amount of CO and CO2; could methanation occur?
We have not recovered this portion of water; it has been discharged directly
1. Acidic water causes severe corrosion of carbon steel; our 304 pipelines have suffered from multiple corrosion leaks. 2. There is successful experience in injecting water into the injection tank after acid gas stripping, using a specialized corrosion inhibitor (Cangzhou Refining & Chemical). I feel that there is a certain degree of risk (due to improper operation or inadequate monitoring of tests), which could lead to severe corrosion.
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It has no effect on the catalyst. Hydrogen injection water is injected behind it. Mainly, it contains a high amount of hydrochloric acid ions, which cause severe corrosion to the materials of the equipment.
I think the main impact is on the corrosion of equipment and pipelines. Many people say that the quality of hydrogenation water can affect hydrogenation catalysts; could you explain that?
Although it is injected after the effluent, the temperature at the injection point is generally between 110 and 130 degrees, which is a high temperature; as a result, the toxic substances present in the acidic water evaporate (hydrogenation catalysts generally require CO+CO2