Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Properties of molecular sieve membranes
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser.
2004 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Zeolites are crystalline aluminosilicates with molecular sieving properties and are widely used in industry for catalysis, sorption and ion-exchange applications. Zeolite membranes are commercially interesting since this technology may be employed for continuous separation of molecules under severe conditions. MFI zeolite has suitable pore diameter for many applications and relatively high thermal and chemical stability. Zeolite films in membranes must be thin, to obtain a high flux and free from defects for high selectivity. Many parameters are affecting the properties of zeolite films and in this thesis some of them are investigated. MFI zeolite membranes were prepared using seed crystals and hydrothermal synthesis and characterized with scanning electron microscopy, single gas permeation measurements, porosimetry and separation experiments. Membranes grown in one or several steps with seeding in-between the synthesis steps were compared. It was observed that membranes comprised of small crystals and consequently high concentration of grain boundaries had low separation performance. Grain boundaries could also be opened by extensive rinsing, which reduced membrane quality. The influence of the calcination rate on the performance of zeolite membranes of a particular type was also studied. It was demonstrated that the calcination rate does not affect the membrane quality.

sted, utgiver, år, opplag, sider
Luleå: Luleå tekniska universitet, 2004. , s. 30
Serie
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757 ; 2004:68
HSV kategori
Forskningsprogram
Kemisk teknologi
Identifikatorer
URN: urn:nbn:se:ltu:diva-17532Lokal ID: 3d784b70-ad59-11db-905c-000ea68e967bOAI: oai:DiVA.org:ltu-17532DiVA, id: diva2:990537
Merknad
Godkänd; 2004; 20070126 (ysko)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2017-11-24bibliografisk kontrollert

Open Access i DiVA

fulltekst(684 kB)16 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 684 kBChecksum SHA-512
4760cbd58bae12776b9fce8a645bd43b66ec05dee30adb4cbb0d0d02248605a48dafa5f62261a4e5b93b9d5ec5830648c7c5ca42f55a969a9e7bf72d5ee7bcd1
Type fulltextMimetype application/pdf

Søk i DiVA

Av forfatter/redaktør
Andersson, Charlotte
Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 16 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 31 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf