Membrane Gas Seperation

Basics

• Seperation of various gasses via semi-permeable membranes
• Can be used for many applications, main OSE ones are:
  • Air Seperation
  • Hydrogen Purification
  • Methane Purification
  • Gaseous Ammonia Purification
  • Carbon Dioxide Scrubbing
  • Removal of Water Vapor from Gas Streams (Membrane Dryer)
• May require a Cascade approach, but can be more compact than other methods
• Also can have a high throughput
• Main challenge is membrane sourcing

Diffusion Rates Chart

• Need chart of the "Diffusion Constant ( D ) of various gasses
• Supposedly Fick's laws of diffusion is used for this? need maths person

Membrane Chart

• Somehow determine diffusion rates of various gasses through various materials (probably much existing research on this)
• Hydrogen diffuses easily through many materials, to the point it makes storage problematic, simple plastic sheeting in a cascade may work?

Useful Links

• The Wikipedia Page on Membrane Gas Seperation