Dangers of Methanol Exposure: Vessel Rupture Risks

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SUMMARY

The discussion centers on the dangers associated with methanol exposure in a high-pressure vessel scenario. When a vessel containing 95% liquid methanol at 4.5 bar and 75°C ruptures, the rapid pressure drop can lead to methanol vaporization, posing significant risks due to its flammability and toxicity. Participants emphasize the importance of safety measures, such as fire suppression systems and blow-out panels, to mitigate the hazards associated with methanol handling in industrial settings.

PREREQUISITES
  • Understanding of chemical properties of methanol, including its flammability and toxicity.
  • Knowledge of pressure vessel design and operation, particularly at high pressures.
  • Familiarity with safety protocols for handling hazardous materials.
  • Experience with emergency response measures in chemical processing environments.
NEXT STEPS
  • Research the chemical properties and hazards of methanol, focusing on its behavior under pressure.
  • Learn about pressure vessel safety standards and regulations, such as ASME Boiler and Pressure Vessel Code.
  • Investigate fire suppression systems suitable for flammable liquid environments.
  • Study emergency response strategies for chemical spills and exposures in industrial settings.
USEFUL FOR

This discussion is beneficial for chemical engineers, safety officers, and industrial plant managers involved in the handling and processing of hazardous materials, particularly those working with methanol and similar substances.

princessme
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For a vessel containing liquid methanol (95%) and other substances (methanol takes up about 40 wt%), which operates at 4.5 bar and 75C, what would happen if the vessel ruptures? SInce it's at a relatively high pressure, the methanol should still remain as liquid and hence no explosion? What kind of dangers would the chemical exposure pose?
 
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Pressure drops when the vessel ruptures. At atmospheric pressure, it is above the boiling point, so I would expect bad results if pressure drop is rapid...
To make it worse, methanol will replace oxygen and is easily flammable. It is also toxic, even in relatively small quantities.
 
When I worked with heated methanol at a pilot plant, it was in a separate building equipped with fire suppression and blow-out (rupture) panels. It is serious business.
 

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