Multicomponent transport of water and methanol in Nafion Conference Paper uri icon

abstract

  • The multicomponent transport of water and methanol in Nafion was studied using time-resolved FTIR, attenuated total reflectance spectroscopy. This technique provided molecular-level contrast between diffusants and polymers in real time, and can also measure chemical interactions between diffusants and polymers through shifts in the infrared spectra. Characteristic IR frequencies associated with water, methanol, and the polymer membrane were identified and quantified at each time step. Water and methanol diffusion and polymer relaxation were measured simultaneously for a range of methanol concentrations. Transient interactions between both diffusants and the polymer membrane were observed via changes in IR band shape and location. These experiments were coupled with classic gravimetric sorption and permeation techniques to elucidate the methanol crossover phenomena in PEM. This is an abstract of a paper presented at the 2006 AIChE National Meeting (San Francisco, CA 11/12-17/2006).

published proceedings

  • AIChE Annual Meeting, Conference Proceedings

author list (cited authors)

  • Hallinan, D. T., & Elabd, Y. A.

complete list of authors

  • Hallinan, DT||Elabd, YA

publication date

  • December 2006