Personnel

StaffProf. J. HedlundDr. G. OlofssonDr. M. GrahnMr. O. NiemiMrs. Siv T. Berhan

Post graduate studentsC. AnderssonJ. LindmarkA. MoscaN. KauppiI. Martínez

Division of Chemical Technology at LuleåUniversity of Technologyhttp://www.ltu.se/tkg/avd/kgt

Master studentsL. StenbergA.-K. AroseniusIrina TrushevaElizaveta PotapovaManuel RubioAsher Zhafar

ResearchFocused on materials development• Synthetic particles of inorganic crystals• Structured materials

Applications • Membranes• Catalysts• Sensors• Adsorbents• Model systems

Current sponsors• VR (Swedish research council)• STEM (Swedish Energy Agency

Partners• Chalmers and KTH• University of Cape Town South Africa• Monash University Australia• LKAB and Volvo

)• FORMAS• HLRC

Natural zeolites

Photograph of about 2 billion years old Natrolite (left) and Stilbite (right) from Faroe Islands and Sweden.

Our strongest research area is structured zeolites

Zeolite films on stainless steelThe photograph shows FAU films on stainless steel. The film thickness varies between the samples, resulting in varying interference colors.

Zeolite film on silicon The photograph shows a silicalite-1 film on a polished silicon wafer. The film results interference color.

The group has developed a new three step (A-C) method for film preparation.

Top view and side view images of adsorbed crystals after step B.

Top view and side view images of a film after step C.

Method for film preparation

Silicalite-1 membranes

Hedlund et al. Microporous and Mesoporous Mater. 52 (2002) 179.

Zeolite membranes

Hedlund et al. Microporous and Mesoporous Mater. 52 (2002) 179.

Zeolite catalysts and adsorbents

MFI films on alumina beads

ZSM-5

Sil-1

ZSM-5 film on a cordierite monolith

Öhrman et al. Applied Catalysis A: General, 270, 193-199, (2004)Öhrman et al. Microporous Mesoporous Mater., 78, 199-208 (2005).Öhrman et al. Microporous Mesoporous Mater., 91 312-320. (2006)

Xylene isomerisation over HZSM-5 films with varying thickness

Hedlund et al. Chemical Engineering Science, 59, 2647-2657 (2004).

Zeolite sensor probes

1.27 Pa ethyl benzene in helium.

It is possible to measure concentrations down to a partial pressure of 70 mPa

200 nm MFI film on ZnS single crystal

Wang et al. Chemical Communications, 24, (2004) 2888

Grahn et al. Microporous and Mesoporous Materials, 81, (2005) 357

Holmgren et al. “Sensor för spektroskopisk analys”, Swedish patent

Zeolite sensor probes more

Grahn et al. Manuscript

Adsorption isotherms for p-xylene in a

silicalite-1 film determined at 323 (▲),

343 (+), 368 (◊), 393 (■) and 423 K (○).

T=323 K

P(Pa) γ°

0.32 34

0.81 28

4.8 22

13 21

31 20

108 20

324 20

648 20

Average tilt angles for p-xylene in a

b-oriented silicalite-1 film at 323 K.

Synthetic particles of inorganic crystalsSilica (a) and hematite (b) crystals

MFI crystals prior to (a) and after epitaxial owergrowth (b) (structuring on crystal level)

MFI overgrowthsFilm

Discrete crystalsLi et al. MicroporousMesoporous Materials, 78 (2005) 1–10.

Wang et al. Microporousand Mesoporous Materials, 97 (2006) 27–33.

Example of ongoing researchCO2-selective Ca-impregnated silicalite-1 membranes

Not published.

Zeolite ants, hollow tubes and spheres impregnated with Pd

Model systems(ongoing)

Alumina (a) coated with 1.7 μm (b) and 7.5 μm (c) hematite film

Side and surfaceview images of hematite film prior to (a,c) and after sintering (b, d) and correspondingXRD patterns (e)

That was all!

Thanks for your attention!

Questions?