Hydrogen-facing system
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During the process as described, water cannot be introduced into the hydrogenation reaction system. What I would like to ask is: if catalysts are not taken into consideration, for example in the case of low molecular weight substances, can water be added when the pressure drops to 3 kilograms?
Low/high levels allow water to enter, but the reactor cannot have water enter it
Water must not be introduced into the reactor at any time; I don’t understand the rest of what the original poster meant.
Water must not be introduced into the reactor at any time; I don’t understand the rest of what the original poster meant.
Feeding water into the reactor means the catalyst is ruined; if low-pressure water needs to be introduced, it’s best to carry out proper isolation and plugging procedures!
I remember having read somewhere before that water seems to be prohibited from entering the hydrogen system, as it forms a corrosive acid
Once the catalyst is introduced into the reaction system’s water stream, it becomes unusable. It’s not just a matter of corrosion; during normal operation, polyacid corrosion also occurs in the distillation system, while in hydrogen-related systems, hydrogen corrosion, hydrogen embrittlement, and hydrogen bubbling are the main issues!
I’m a beginner in hydrogenation; what is lactic acid?
Furthermore, water is allowed to be present behind the reactor; water injection takes place before high-air exchange and reactor air cooling. Water must absolutely not be present in front of the reactor! In front of the reactor, there is hydrogen corrosion; behind it, there is the acid corrosion you mentioned!
It’s on the forum; take a look! Chelated poly-sulfuric acid corrosion should be referred to as chelated poly-sulfuric acid stress corrosion cracking (SCC). It generally occurs in reaction towers and their linings and internal components, storage tanks, heat exchangers, pipelines, and heating furnace tubes under high-temperature and high-pressure hydrogen-containing environments, especially in equipment manufactured from austenitic stainless steel used in systems such as hydrodesulfurization, hydrocracking, and catalytic reforming. Under normal operating conditions of high temperature, high pressure, oxygen deficiency, and water scarcity, these devices do not form polythiols. However, when the equipment is subjected to sulfur corrosion during operation, sulfides are formed on its surface. When oxygen (air) and water enter the device during periods of inactivity, they react with the hydrogen sulfide present on the surface to produce polythiols. Even when the device is shut down, tensile stresses usually remain. Under the combined effect of polythiols and these tensile stresses, austenitic stainless steels and other highly alloyed metals become susceptible to sensitization (sensitization can occur during the manufacturing process or as a result of prolonged operation at temperatures above 427–650°C), which can lead to stress corrosion cracking (SCC).