After the low-pressure methanol catalyst is installed, can the methanol synthesis tower be press-tested with hydrogen or a mixture of hydrogen and nitrogen?
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After the low-pressure methanol catalyst is installed, can the methanol synthesis tower be press-tested with hydrogen or a mixture of hydrogen and nitrogen? Recently, a company in Jiangsu was preparing to conduct pressure testing on its low-pressure methanol synthesis tower after catalyst loading. Due to the lack of medium-pressure nitrogen, it was decided to use hydrogen-nitrogen gas (ammonia synthesis gas) for pressurization; however, the catalyst manufacturer firmly opposed this approach. Please discuss what consequences using hydrogen and nitrogen gas will have on pressure
The synthetic catalyst should not be able to use air
Can hydrogen or a mixture of hydrogen and nitrogen be used for pressure testing? Please pay close attention to the question in the stem
This post was last edited by he*aoyu8911 on 2017-3-27 at 15:08. Air should work, nitrogen as well; as for hydrogen, its concentration during reduction is less than 0.2%. If you introduce it at such an early stage, are you sure it can be completely displaced during reduction? The catalyst has a porous structure with an extremely large specific surface area~~
Nitrogen should be used for pressure testing the synthesis tower after catalyst loading. Some plants do not have nitrogen or only have low-pressure nitrogen; for pressure testing of medium-pressure or high-pressure synthesis towers, syngas (a mixture of hydrogen and nitrogen) is used directly. This resulted in the catalyst overheating.
The catalyst manufacturer doesn’t allow you to use high-pressure hydrogen and nitrogen, nor does it permit the use of air; you need to figure out what to do on your own
Low-pressure methanol catalysts are at risk of excessive temperature rise when operating under a hydrogen-nitrogen gas mixture ratio of 3:1 at a pressure of 1.5 MPa.
I’m not sure whether you want to perform pressure testing for leaks in the synthesis tower, or to conduct pressure resistance testing on the catalyst that has been loaded