The issue of hydrogen production via ammonia decomposition
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Is a safety production license required to produce a hydrogen-nitrogen mixture by decomposing ammonia? According to the design specifications for hydrogen stations, ammonia decomposition for hydrogen production is not classified as a hydrogen supply station, but rather as a hydrogen station. If the hydrogen supply station covers an area of no more than 500 m2, it may be adjacent to a hydrogen handling workshop with a fire resistance rating of at least grade II or other Class D or E workshops where no open flames are used. The wall separating them should be an explosion-proof barrier without any doors or windows, and it is advisable to locate such a station on the exterior wall or at the end of the building. Can this be used for hydrogen production via ammonia decomposition?
Using ammonia to produce hydrogen – the scale is likely not very large; it needs to be carried out according to high standards.
1. According to the definition of hazardous chemical manufacturing enterprises, it is necessary to obtain a license for hazardous chemical production. 2. It isn’t explicitly required, but relevant guidelines can be referred to
A license for the production of hazardous chemicals must be obtained.
For the two people upstairs, according to the requirements for obtaining the certification, it should be pure hydrogen or nitrogen, and it has to be compressed. How do you think one can obtain a permit for mixed gases? Is it better to get hydrogen or nitrogen? Is it on the list of hazardous chemicals for mixed gases? Which number is suitable? Personally, I am against issuing permits, but an assessment of the current situation should be carried out every two years – after all, the risks cannot be ignored, and hazardous ammonia is used.
In such cases, Shandong Province has issued a response letter (I’ve forgotten which municipal bureau it was for). This reply addresses the question of whether a safety production license is required for PSA pressure swing adsorption nitrogen generation units. The gist of the reply is that the nitrogen produced by pressure swing adsorption is included in the List of Hazardous Chemicals; hence it constitutes a hazardous chemical production project. However, in the case of ordinary enterprises, the nitrogen generated by their pressure swing adsorption systems is used for internal purposes within the company and not sold as a commodity. Therefore, it can be managed as a hazardous chemical production project, but there is no need to issue a safety production license. I want to produce a hydrogen-nitrogen mixture by decomposing ammonia; could I refer to the above reply for guidance? (Because the devices for producing a hydrogen-nitrogen mixture by decomposing ammonia are also basically used by galvanizing plant companies as protective gas.)
Ammonia decomposition furnaces are generally suitable for use as a protective gas during the annealing of steel strips or other materials at high temperatures; their main purpose is to prevent oxidation at high temperatures, and the pressure is quite low, perhaps only a few thousand pascals. It is likely not necessary to obtain a work safety license; most of the items listed in the catalog are compressed gases. However, the catalog does not specify the pressure level for these compressed gases – it is probably assumed to be 0.1 MPa or higher. If the decomposition gas is a hazardous chemical, then air should also be one as well, but the list only specifies compressed air as a hazardous chemical.
What should it actually look like? I’ve run into this problem too