Investigating the effect of hydrogen sulfide impurities on the separation of fermentatively produced hydrogen by PDMS membrane

P. Bakonyi, F. Bogdán, V. Kocsi, N. Nemestóthy, K. Bélafi-Bakó, G. Buitrón

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

This work reports on the separation of biohydrogen using a hollow-fiber PDMS membrane. The performance of the module was evaluated using binary CO2/H2 (35-65 vol.% H2 content) and ternary CO2/H2/H2S mixtures (50 vol.% H2, 50 vol% CO2, 25-175 ppm H2S) and the effect of recovery and gas composition (with special focus on hydrogen sulfide content) was revealed. H2S is a potential impurity of the raw gas coming from steady-state, dark fermentative hydrogen producing bioreactors. The results indicated that H2S could have a concentration-dependent impact on membrane behavior and affected the obtainable CO2/H2 selectivity. The outcomes were thoroughly compared to other relevant gas separation reports found in the literature. Evaluating the impacts of trace-level substances present in the gaseous mixture containing biohydrogen may help to design effective purification system based on membrane technology for the hydrogen economy.

Original languageEnglish
Pages (from-to)222-228
Number of pages7
JournalSeparation and Purification Technology
Volume157
DOIs
Publication statusPublished - Jan 8 2016

Keywords

  • Biohydrogen purification pdms membrane gas separation hydrogen sulfide

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

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