Issues related to CO in hydrorefining
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Recently, the CO level inside the device has been very high, resulting in defective products. What is the reason?
If the hydrogen supplied for hydrorefining contains CO, a methanation reaction will occur, releasing heat. To prevent the bed from overheating and to lower the reaction temperature, the product quality will be compromised.
Is the only option then to increase the emissions of waste hydrogen? What exactly causes methane?
The additional hydrogen must enter the reactor and undergo a reaction; increasing emissions is useless.
This post was last edited by zls1457 on 2016-4-3 at 14:09. Methanation reactions occur in the reactor due to carbon monoxide, and water is also produced; in severe cases, this can lead to overheating of the bed layer, resulting in substandard products. This leads to a decrease in the mechanical strength of the catalyst carrier. It means that the circulating hydrogen contains carbon monoxide; in other words, the purity of the hydrogen you use for supplementation is not high enough – it’s not hydrogen with a purity of three 9s. The supplemental hydrogen contains carbon monoxide; to increase its purity, open the waste hydrogen release valve to discharge the waste hydrogen. Increase the purity of the supplementary hydrogen. Try it this way. Check the effect. It's purely a personal opinion.
What do you mean by replenishing hydrogen? ? :P
This post was last edited by zls1457 on 2016-4-3 14:15. Yes. What I’m referring to is the supplementation of hydrogen – that is, the so-called new hydrogen – to improve the purity of the circulating hydrogen. It comes from outside the device, from a PSA or hydrogen production unit. Isn’t it that the hydrogen purity used for supplementation isn’t sufficient? So, where does carbon monoxide come from? Isn’t it a problem with the purity of the hydrogen being used for supplementation? The impurity in the hydrogen used for supplementation leads to a decrease in the purity of both the circulating hydrogen and the quenching hydrogen; as a result, methanation reactions can occur Isn’t that the case?
I’m also wondering where methane comes from; after all, I’m a beginner in the chemical industry. Please help!
Was it the methanation reaction that caused the temperature across the layers to rise, forcing the operators to lower the reactor temperature? That’s why the product became defective