Low-pressure gas, waste hydrogen
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Can the desulfurized mixture of hydrogenated light gas and waste hydrogen be fed into a natural gas-based hydrogen production plant for hydrogen recovery and utilization?
It can be used directly in PSA pressure swing adsorption!
As mentioned above, the impurities are directly removed in the PSA pressure swing adsorption process for the light gas stream; since this stream contains a high amount of hydrogen, there is no need to send it to the hydrogen production unit, as that would result in unnecessary energy consumption!
From the low-pressure gas separation tank to the low-pressure gas desulfurization tower, then to PSA
Low-pressure gas contains approximately 60%-70% hydrogen. By using a membrane purification unit for such gas in our facility, the purity can be increased by about 10 percentage points. The hydrogen sulfide content in low-pressure gas is quite high; a small amount of it is acceptable for hydrogen production, but too much of it affects the quality of the raw materials used in hydrogen production.
Are there any issues with combining low-pressure gas and waste hydrogen after desulfurization before feeding them into the PSA adsorption stage for natural gas hydrogen production?
This post was last edited by Green Lotus on 2017-10-31 at 16:44. Generally, the PSA units used in natural gas-based hydrogen production are designed with a processing capacity sufficient only for purifying the hydrogen produced from natural gas. If gas with low purity and non-hydrogen components is to be fed into the PSA adsorption section for natural gas hydrogen production, this volume of gas must be taken into account during the design; otherwise, since the volume of gas will far exceed the existing design capacity, the hydrogen produced will certainly not meet the process requirements. Or, if your entire natural gas-based hydrogen production facility is shut down, low-pressure gas and waste hydrogen can be fed into the existing natural gas PSA adsorption unit; as long as it is determined that the volume of gas is roughly equivalent to the original design capacity, it should work fine.
What kind of hydrogen production facility do you have for natural gas-based hydrogen production?
We are carrying out the recovery of this hydrogen by reusing an existing PSA unit and replacing it with a specialized catalyst