CO and H2 separation technology
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How can a small amount of H2 be removed from CO? The hydrogen content in the feed gas is about 2000 ppm, with the remainder being CO; how can this hydrogen content be reduced to around 100 ppm? Experts from HaiChuan, please help come up with a solution. Recommended manufacturers are also fine.
1. Add trace amounts of oxygen and carbon monoxide; a catalytic reaction takes place to produce water, which can then be removed. This method can be easily implemented in combination with a device for producing carbon monoxide. 2. Removing hydrogen using pressure swing adsorption (this method requires relatively high design standards)
Oxygenation dehydrogenation catalysts have high requirements; the removal of trace amounts of hydrogen from CO cannot reach 100 ppm – generally, it can only achieve around 500 ppm. Moreover, side reactions occur that result in the formation of CO2, and at a temperature of 200 degrees, very small amounts of methane are also produced. Does anyone upstairs have any good recommendations for manufacturers of dehydrogenation catalysts?
Consider mixing heavier unsaturated hydrocarbons with a hydrogenation catalyst, and then absorbing hydrogen through the hydrogenation of light hydrocarbons. If the equilibrium constant is known, it is possible to calculate whether the residual H2 concentration at the lowest feasible reaction temperature meets the requirements. This post was last edited by RainWolf on 2009-3-3 18:29]
I suddenly remembered that the hydrogenation catalysts we used in the past would become poisoned by CO, so it was necessary to use a methanation reactor to remove CO before they could be used. I really don’t know where to start looking for a hydrogenation catalyst that isn’t sensitive to CO.
Now we have a new technology for the deep dehydrogenation of hydrogen impurities in CO, using membrane separation. The unit has been successfully applied in the ethylene glycol project. Those in need can contact me via private message, QQ 123807447
The separation of CO and H2 can also be achieved using the principle of low-temperature distillation
Fujian Institute of Physical Chemistry uses selective catalytic dehydrogenation technology, which is said to be capable of reducing the concentration to below 100 ppm; you might want to inquire about this.
The CO concentration is too high; the catalytic oxidation dehydrogenation approach is likely not feasible. Membrane separation should be relatively reasonable.