Could the experienced expert please explain what “carbon analysis” is? It’s best to use plain language”
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As the title suggests, I have just started working with natural gas for hydrogen production. When I came across this term, I searched on Baidu, and there were various explanations available, but they were a bit hard to understand. Is it only present when there is a change in reaction time? Will moderate changes not occur? Could some experienced teacher explain it in simple terms? Another question is: how does \"carbon separation\" occur? How to avoid it? How to handle it? I hope you can offer your guidance; thank you so much! !
This post was last edited by Shutong on 2022-7-28 at 16:57. Regarding carbon deposition, different industries have various opinions: 1. During the methane conversion process, a very small amount of carbon black is generated, which causes blockage in the catalyst bed and an increase in resistance; this process is often referred to as carbon deposition reaction. 2. Carbon deposition in the heat exchanger metal.
Carbon deposition occurs when methane undergoes a catalytic reaction in the absence of steam (water) involved in the process; as a result, carbon in the catalyst precipitates and forms carbon deposits. There is another situation in which excessively high natural gas temperatures can cause carbon deposition to form carbon powder (natural gas pyrolysis carbonization). Based on the reaction mechanism of methane on conversion catalysts (at the microscopic level), when methane reacts on the surface of nickel metal, carbon is deposited as a result; the hydrogen in methane escapes, and carbon atoms accumulate on the surface of the nickel metal to form deposits. Steam then plays a role in this reaction by oxidizing the carbon atoms, resulting in the formation of CO or CO2, while the hydrogen from water also escapes. If there is a shortage of steam (water) during operation, the carbon that forms on the surface of the nickel metal cannot be oxidized (through the carbon-removal reaction); as a result, the carbon continues to grow until it forms carbon lumps.
Carbon analysis refers to the dehydrogenation of hydrocarbons to produce carbon and hydrogen gas