Issues related to the separation of carbon monoxide and hydrogen in syngas
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It’s like this: I have a project in which the main raw materials are syngas (CO2/H2). The system generates vent gas, but in order to minimize the emission of carbon monoxide and hydrogen in that vent gas, I would like to recover those gases from it. Does anyone know where this can be done? Or are there any existing successful examples? Thank you all for your help.
This technology is too widespread; it can be achieved using simple pressure swing adsorption technology! Our company specializes in gas separation technology. You can call at 028-85311555-839
There are many typical examples of gas membrane separation applications, and numerous companies both at home and abroad can handle them; you can find detailed information by doing a search, or you can also consult Hai Ban, as they handle such projects as well
This requires a special pressure swing adsorption process. Sichuan Tianyi Technology has developed similar technologies; there are such installations in Yulin, Shaanxi, as well as at Nanda University. These systems are used to produce hydrogen from methanol off-gases, by removing the inert gases nitrogen and argon, while simultaneously recovering carbon dioxide and carbon monoxide to supply carbon back to the system. You can look up their contact information online.
The separation of hydrogen and nitric oxide is already quite mature, with common methods including cryogenic separation, membrane separation, and PSA. Deep cryogenics requires high energy consumption; it is economical when there is a large volume of off-gas production and multiple products are involved. But for the OP’s situation, it might not be very cost-effective. Membrane separation is already a very successful example; in the current ammonia synthesis industry, at least 80% of companies use separation techniques to recover hydrogen. Both the recovery rate and concentration can reach double 90%, with the secondary membrane delivering even better results. PSA has a high purity, but its biggest drawback is the low recovery rate. The original poster can search online; many companies have information available. As it is the companies themselves that promote these products, the specific effects vary. You can take a look at relevant literature, as it provides more objective information; more direct data will also allow you to make clear comparisons.
Thank you for your advice. However, there is a small amount of nitrogen in my gas mixture, and I’m not sure if this will affect the efficiency of separation and concentration.
Thank you for your advice. However, there is a small amount of nitrogen in my gas mixture; I’m not sure if this will affect the efficiency of separation and concentration. ================================== For PSA, it has no impact!
In membrane separation, nitrogen is a slow gas and has no impact on concentration enhancement.
Nitrogen and carbon monoxide have the same molecular weight, so they cannot be separated using membranes. But separating hydrogen definitely gives priority to the hydrogen membrane
Can membranes actually be used to separate carbon monoxide?
Our company is in a similar situation: the gas volume is around 10,000, with about 70% being hydrogen and around 8% being carbon monoxide. Is there any suitable method for separating carbon monoxide from hydrogen?