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| rdf:type
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| Description
| - Transport properties of the supporting porous layer in heterogeneous catalysis are determined by the layer structure. The support material is supplied in a form of powder with intraparticle properties given by specific syntesis method. For the transport by diffusion, primarily macropores between the particles plays dominant role. There are many techniques for preparation of porous layers with different macroporous structure. But, if the layer has insufficient transport properties (i.e. low macroporosity), pore-templating technique can be used to introduce additional pores and enhance the performance of the catalyst. Many different materials were already tested for this purpose. We have chosen polystyrene (PS) particles of one size to easily distinguish pores created naturally and those incorporated by the method in the SEM image. Series of ?-Al2O3 samples with varied content of PS particles was prepared to get gradually increasing macroporosity. Afterwards, catalysts with Pt/?-Al2O3 catalytic layer coated on the metal foil and top inert ?-Al2O3 layer with and without PS particles were made to study the effect of increased porosity on the shape of CO light-off curve. The additional transport barrier formed by the top inert layer without PS-templated pores had higher outlet concentration than the corresponding layer with pore templates. This study showed the possibility to enhance diffusion in the porous layer, yet the material used was very expensive. Therefore we started to use cheap yiest. In the future work, we will test also other materials.
- Transport properties of the supporting porous layer in heterogeneous catalysis are determined by the layer structure. The support material is supplied in a form of powder with intraparticle properties given by specific syntesis method. For the transport by diffusion, primarily macropores between the particles plays dominant role. There are many techniques for preparation of porous layers with different macroporous structure. But, if the layer has insufficient transport properties (i.e. low macroporosity), pore-templating technique can be used to introduce additional pores and enhance the performance of the catalyst. Many different materials were already tested for this purpose. We have chosen polystyrene (PS) particles of one size to easily distinguish pores created naturally and those incorporated by the method in the SEM image. Series of ?-Al2O3 samples with varied content of PS particles was prepared to get gradually increasing macroporosity. Afterwards, catalysts with Pt/?-Al2O3 catalytic layer coated on the metal foil and top inert ?-Al2O3 layer with and without PS particles were made to study the effect of increased porosity on the shape of CO light-off curve. The additional transport barrier formed by the top inert layer without PS-templated pores had higher outlet concentration than the corresponding layer with pore templates. This study showed the possibility to enhance diffusion in the porous layer, yet the material used was very expensive. Therefore we started to use cheap yiest. In the future work, we will test also other materials. (en)
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| Title
| - Optimization of transport properties in coated catalytic layer by using macropore templates
- Optimization of transport properties in coated catalytic layer by using macropore templates (en)
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| skos:prefLabel
| - Optimization of transport properties in coated catalytic layer by using macropore templates
- Optimization of transport properties in coated catalytic layer by using macropore templates (en)
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| skos:notation
| - RIV/60461373:22340/13:43895628!RIV14-GA0-22340___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/60461373:22340/13:43895628
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - porous catalytic structure; pore templating; automotive catalyst; effective diffusion coefficient (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - Proceedings of the 40th International Conference of Slovak Society of Chemical Engineering
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Kočí, Petr
- Marek, Miloš
- Dudák, Michal
- Václavík, Marek
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/zahajeniAkce
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| number of pages
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| http://purl.org/ne...btex#hasPublisher
| - Slovak Society of Chemical Engineering
|
| https://schema.org/isbn
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| http://localhost/t...ganizacniJednotka
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