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Pilot test of platinum-rhodium-palladium mesh catalyst ammoniated with ammonia

2007-12-06View Original

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We are currently carrying out preliminary work for a chemical product, and for this purpose we need nitric oxide gas produced via ammonia oxidation under atmospheric pressure. This is similar to the ammonia oxidation process used in older atmospheric-pressure nitric acid production plants. We intend to address the key technical challenges through industrial-scale pilot tests, and the nitric oxide gas mentioned earlier is required for these tests. At present, the source of this gas has become a major issue: should we use nitric acid production facilities that already have this gas available? Given the strict regulations regarding safety and environmental protection, it is unlikely that such facilities will agree to do so. Alternatively, we could purchase gas in cylinders, but first, the price is very high, and the amount needed for testing is large, resulting in high costs. Moreover, the gas in cylinders consists only of pure nitrogen monoxide and nitrogen dioxide; after acquiring it, we still need to mix nitrogen monoxide, nitrogen dioxide, nitrogen, and oxygen together. This is not only troublesome but also difficult to achieve a composition similar to that of the gas produced via ammonia oxidation. Additionally, due to the presence of oxygen, some of the nitrogen monoxide will continue to oxidize, leading to a distortion in the composition. Therefore, it is possible to consider installing a small ammonia oxidation unit – one that is extremely compact and produces only a few dozen cubic meters of nitrogen oxide gas per hour. Questions arise regarding whether catalysts made of platinum-rhodium-palladium mesh are available, whether it is feasible to construct such a small ammonia oxidation furnace, and whether its operation and control can meet the required standards, among other things. Feel free to discuss and offer suggestions. Thank you!
Reply #22008-03-14
It’s not very operational. High safety requirements apply to ammonia oxidation. Building a small facility requires a significant investment. I wonder what your usage of nitric oxide gas is. Platinum-rhodium-palladium mesh catalyst manufacturers can produce catalysts of any size
Reply #32008-03-14
Platinum-rhodium-palladium meshes are very expensive. Building such a setup on one’s own would definitely cost a lot; it is recommended to contact a nitric acid factory to handle the production of subsequent products – presumably some manufacturers will be interested. As for environmental protection requirements, the relevant manufacturers should have ready-made treatment devices; even the cost of adding an alkaline solution absorption system is not high.

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