The methane content in the recycled hydrogen is high
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May I ask, in the hydrorefining of naphtha, what causes the high methane content in the recycle hydrogen? What is the principle behind this? Thank you! ! !
Check the hydrogen composition of the upstream hydrogen production
Methane comes from two sources: 1. Hydrogen introduced into the system, which requires sampling and analysis at the boundary zone to determine this. 2. It is generated in the reactor due to reasons such as the end of the catalyst’s lifespan, excessive cracking caused by high reaction temperatures, and lighter components in the feed oil, among others. Regardless of the cause, while addressing the root issue, it is possible to increase the amount of hydrogen waste discharged, accelerate system replacement, and bring the methane content up to the required standard as soon as possible.
It is generally introduced into the system as new hydrogen; the possibility of it being generated within the reactor is low. The purity of the hydrogen upstream should be adjusted, and the waste hydrogen replacement system should be enhanced.
Purity of new hydrogen: strict control over CO and CO2 levels
An increase in the levels of CO and CO2 leads to methanation reactions; in severe cases, this results in significant heat release, causing the reactor temperature to soar. That’s what it says in the documents; it’s for reference only. ,
Large reaction depth, caused by cracking； Introduced in the new hydrogen
Excess levels of carbon monoxide and carbon dioxide in the supplemental hydrogen
The methane content in the cycle hydrogen used for diesel hydrogenation in our plant is also high
Methane comes from two sources: 1. Hydrogen introduced into the system, which requires sampling and analysis at the boundary zone to determine this. 2. It is generated in the reactor due to reasons such as the end of the catalyst’s lifespan, excessive cracking caused by high reaction temperatures, and lighter components in the feed oil, among others. Regardless of the cause, while addressing the root issue, it is possible to increase the amount of hydrogen waste discharged, accelerate system replacement, and bring the methane content up to the required standard as soon as possible.