The explosion limit issue of hydrogen
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The explosion limit of hydrogen in air is 4–74%, but how can the explosion limit be determined when the oxygen content is reduced? What are the calculation methods? Or whether there is existing data available.
There is a related chart on page 46 of the book \"Petroleum and Chemical Industry Safety Technology\" (intermediate level), published in 1998; you can take a look at it. Furthermore, in the 2005 edition of \"Petroleum and Chemical Industry Safety Technology\" (advanced version), Table 2-5 indicates that when nitrogen is used as a diluent and the oxygen content is below 5%, hydrogen will not explode.
Hello, it seems that the forum owner knows a lot about this area! Could I ask what the maximum safe oxygen content is for toluene when it is under nitrogen protection? ? 》I’m downloading the book on chemical safety technology you mentioned
I’ve already downloaded the advanced version from 2005; feel free to contact me if you need it.
I’m not actually an expert in this; I just have some relevant books available. When diluted with nitrogen, the highest oxygen content in the mixture, without combustion or explosion of toluene, is 9.5%.
I’ve learned it! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
I have seen situations like yours in the process units of reaction vessels; in those cases, toluene is added as a feed material to the reaction vessel, and an oxygen content analyzer is installed for real-time monitoring, with the oxygen level being kept below 3% vol. If this limit is exceeded, an automatic nitrogen injection system activates as a protective measure. There are no particularly clear standards for this; generally, in the industry, the oxygen content should not exceed 3%–5% vol