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Title: Pervaporation of Water from Aqueous Hydriodic Acid and Iodine Mixtures Using Nafion (R) Membranes

Abstract

The sulfur-iodine (S-I) process for generation of hydrogen has been proposed as a thermochemical cycle for study due to its predicted high efficiencies. Improvements in the cycle that will yield the greatest gain in both operating and capital costs involve chemical separations. To date, membrane processes have been largely unexplored. In this work, a materials compatibility study into the application of Nafion-117® and Nafion-112® as membranes for the pervaporation of water from aqueous mixtures of hydriodic acid (HI) and HI/iodine at 134 ºC was conducted. Significant fluxes of water were measured with respect to feed water concentration and high separation factors were calculated. Most surprisingly, HI and HI/iodine feeds acted very differently in that HI-iodine complexes formed result in higher fluxes and separation factors than what was observed for HI alone.

Authors:
;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - NE
OSTI Identifier:
920712
Report Number(s):
INL/JOU-06-11554
Journal ID: ISSN 0376-7388; JMESDO; TRN: US200818%%124
DOE Contract Number:  
DE-AC07-99ID-13727
Resource Type:
Journal Article
Journal Name:
Journal of Membrane Science
Additional Journal Information:
Journal Volume: 304; Journal Issue: 1 - 2; Journal ID: ISSN 0376-7388
Country of Publication:
United States
Language:
English
Subject:
08 - HYDROGEN; CAPITALIZED COST; COMPATIBILITY; HYDRIODIC ACID; HYDROGEN; IODINE; MEMBRANES; MIXTURES; WATER; Hydriodic acid; membranes; Nafion; pervaporation; Sulfur-iodine cycle

Citation Formats

Orme, Christopher J, and Stewart, Frederick F. Pervaporation of Water from Aqueous Hydriodic Acid and Iodine Mixtures Using Nafion (R) Membranes. United States: N. p., 2007. Web. doi:10.1016/j.memsci.2007.07.028.
Orme, Christopher J, & Stewart, Frederick F. Pervaporation of Water from Aqueous Hydriodic Acid and Iodine Mixtures Using Nafion (R) Membranes. United States. https://doi.org/10.1016/j.memsci.2007.07.028
Orme, Christopher J, and Stewart, Frederick F. Thu . "Pervaporation of Water from Aqueous Hydriodic Acid and Iodine Mixtures Using Nafion (R) Membranes". United States. https://doi.org/10.1016/j.memsci.2007.07.028.
@article{osti_920712,
title = {Pervaporation of Water from Aqueous Hydriodic Acid and Iodine Mixtures Using Nafion (R) Membranes},
author = {Orme, Christopher J and Stewart, Frederick F},
abstractNote = {The sulfur-iodine (S-I) process for generation of hydrogen has been proposed as a thermochemical cycle for study due to its predicted high efficiencies. Improvements in the cycle that will yield the greatest gain in both operating and capital costs involve chemical separations. To date, membrane processes have been largely unexplored. In this work, a materials compatibility study into the application of Nafion-117® and Nafion-112® as membranes for the pervaporation of water from aqueous mixtures of hydriodic acid (HI) and HI/iodine at 134 ºC was conducted. Significant fluxes of water were measured with respect to feed water concentration and high separation factors were calculated. Most surprisingly, HI and HI/iodine feeds acted very differently in that HI-iodine complexes formed result in higher fluxes and separation factors than what was observed for HI alone.},
doi = {10.1016/j.memsci.2007.07.028},
url = {https://www.osti.gov/biblio/920712}, journal = {Journal of Membrane Science},
issn = {0376-7388},
number = 1 - 2,
volume = 304,
place = {United States},
year = {2007},
month = {11}
}