Rapid thermal processing and separation performance of columnar MFI membranes on porous stainless steel tubes

Jared A. Stoeger, Jungkyu Choi, Michael Tsapatsis

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Continuous MFI-type zeolite membranes were fabricated on porous stainless steel tube supports by secondary (seeded) growth. The physical attachment of zeolite seed particles was initiated through sonication assistance on unmodified supports. Despite a sparse seed layer, a single hydrothermal growth step reliably led to c-/h0h-out-of-plane-oriented pure-silica MFI membranes. Rapid thermal processing was applied to as-synthesized membranes, extending the findings of a previous report on controlling the density of grain boundary defects. The RTP-treated membranes showed an improved separation factor of 29 for p-/o-xylene with a maximum p-xylene permeance of 6.6 × 10 -8 mol m -2 s -1 Pa -1, while conventionally (slowly) calcined counterparts had a maximum separation factor and p-xylene permeance of 3-4 and 2.7-4.5 × 10 -8 mol m -2 s -1 Pa -1, respectively. The membranes also showed insensitivity to temperature for n-/i-butane separation performance (separation factor ca. 15 and n-butane permeance ca. 1.3 × 10 -7 mol m -2 s -1 Pa -1), while conventionally calcined ones exhibited a significant decrease in the separation factor with temperature. Pervaporation measurements from a dilute aqueous feed that exploited the hydrophobicity of RTP-treated membranes revealed their potential use in bioalcohol recovery processes from fermentation broths, specifically for ethanol (total flux and separation factor of 1.2 kg m -2 h -1 and 43, respectively) and n-butanol (total flux and separation factor of 0.11 kg m -2 h -1 and 21, respectively) extraction from the aqueous phase.

Original languageEnglish
Pages (from-to)3479-3486
Number of pages8
JournalEnergy and Environmental Science
Volume4
Issue number9
DOIs
Publication statusPublished - 2011 Sep 1

Fingerprint

Rapid thermal processing
Stainless Steel
Stainless steel
steel
membrane
Membranes
xylene
Xylene
Zeolites
Butane
zeolite
Seed
Fluxes
seed
1-Butanol
Pervaporation
Sonication
hydrophobicity
Hydrophobicity
grain boundary

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Chemistry
  • Pollution
  • Nuclear Energy and Engineering

Cite this

Rapid thermal processing and separation performance of columnar MFI membranes on porous stainless steel tubes. / Stoeger, Jared A.; Choi, Jungkyu; Tsapatsis, Michael.

In: Energy and Environmental Science, Vol. 4, No. 9, 01.09.2011, p. 3479-3486.

Research output: Contribution to journalArticle

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