Regarding a benzene concentration of 50,000 mg/m3, is the air diluted before it enters the adsorption system?
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Given a benzene concentration of 50,000 mg/m3, air is used for dilution before adsorption. What measures can be taken to ensure that no explosion occurs during this dilution process? Is it sufficient to dilute the mixture to below its lower explosive limit?
At such a high concentration, adsorption is not recommended. If more detailed information can be provided, there might be other suitable methods
First, condense it with ice water to separate the gas from the liquid, which reduces the concentration. Then air is introduced into the system; setting safety issues aside for now, the additional load represents a considerable cost as well.
Cost is not a concern for now; the main issue to address is security. Are there any good solutions?
Look on the second floor; it should be some big shot from the design institute. They’re in the same area as you； Condensation first, then adsorption – do you carry out condensation before adsorption? If there is no condensation, add more condensers; if the condensers are too small, increase their number until the concentration required for adsorption is achieved.
Reduce the saturated vapor pressure, then re-adsorb.
The freezing point of benzene is around 5.5°C; for benzene-containing exhaust gases at near-atmospheric pressure, conventional condensation methods at about 6°C can only reduce the benzene concentration to several hundred thousand mg/m3. Further reduction of the benzene concentration from 50,000 mg/m3 can only be achieved by using a more complex recovery system that employs cryogenic \"solidification-condensation\" switching operations. Of course, pre-treatment methods such as solvent absorption or compression to increase pressure followed by conventional condensation can also be used to reduce the benzene concentration in the exhaust gases.