Franziska Scheffler - Academia.edu (original) (raw)

Papers by Franziska Scheffler

Advances in Science and Technology, Oct 10, 2006

Zeolites find various applications in heterogeneous catalysis, microreactor techniques, sorption ... more Zeolites find various applications in heterogeneous catalysis, microreactor techniques, sorption techniques, ion exchange and more recently in heat pump applications. In common processes zeolites are used as shaped bodies with a size in the millimeter range. Novel processes made it necessary to apply zeolites as coating on inert or reactive bulk or porous substrate materials. In the past fifteen years various methods for zeolite coatings have been developed and adapted to the specific requirements with respect to the process they are to be used and to the specific physical and chemical properties of the support material.

Materials & Design, Nov 1, 2020

Ink was made from C 2 H 6 O 2 and Sb 2 Te 3 through dispersion and homogenization. • Thin (139μm)... more Ink was made from C 2 H 6 O 2 and Sb 2 Te 3 through dispersion and homogenization. • Thin (139μm) and porous (20%) selfsupporting layers (5⋅5cm) were doctor bladed. • Improvement of the thermoelectric power factor to 2097 μW/m⋅K 2 at room temperature. • Results imply possible mass production of thermoelectric thin sheets out of Sb 2 Te 3 .

Microporous and Mesoporous Materials, 2017

Advanced Engineering Materials, 2017

Chemie Ingenieur Technik, Sep 1, 2006

zeichnen sich durch hohe mechanische Stabilität aus und können als Katalysator (TiO 2), Katalysat... more zeichnen sich durch hohe mechanische Stabilität aus und können als Katalysator (TiO 2), Katalysatorträger, Filter für korrosive Medien oder als leichte Strukturelemente auch bei hohen Temperaturen verwendet werden.

Chemie Ingenieur Technik, Aug 14, 2012

Propenoxid ist ein wichtiges Zwischenprodukt der chemischen Industrie. Es wird unter anderem zur ... more Propenoxid ist ein wichtiges Zwischenprodukt der chemischen Industrie. Es wird unter anderem zur Herstellung von verschiedenen Kunststoffen benötigt. Da die aktuell eingesetzten Verfahren zur Produktion von Propenoxid entweder große Mengen unerwünschter Nebenprodukte erzeugen oder in Bezug auf die eingesetzten Ausgangsstoffe sehr kostspielig sind, ist es aus ökonomischer und ökologischer Sicht wünschenswert, Propen auf direktem Weg durch Luftsauerstoff zu epoxidieren. Wie gezeigt werden konnte, ist dies mit geträgerten Goldkatalysatoren möglich. Dieser Beitrag geht der Frage nach, inwiefern titansubstituierte Alumophosphate als Träger für solche Katalysatoren geeignet sind.

Wiley-VCH Verlag GmbH & Co. KGaA eBooks, Mar 24, 2006

Catalytic processes are the driving force in industrial chemistry. More than 80 % of all base che... more Catalytic processes are the driving force in industrial chemistry. More than 80 % of all base chemicals and products have encountered a catalyst (homogeneous or het-erogeneous) during their production or conversion. Most of these processes are het-erogeneously catalyzed, which means ...

Microporous and Mesoporous Materials, Feb 1, 2017

The metal organic framework (MOF) materials HKUST-1, CAU-10, MIL-101(Cr) and UiO-66(Zr) were succ... more The metal organic framework (MOF) materials HKUST-1, CAU-10, MIL-101(Cr) and UiO-66(Zr) were successfully coated onto open cellular silanized alumina and oxide bonded silicon carbide foams by a direct crystallization approach. Two different silanization routes were tested with respect to the functional group of the silane molecule used. For the HKUST-1 and CAU-10 based composite materials the influence of the foam material, its pore size and pore density and its surface chemistry on the amount of deposited MOF material and its water uptake capacity was evaluated. Based on these data in combination with micro computertomograpy results a model was developed to estimate the MOF coating thickness on cellular supports.

Advanced Engineering Materials, Apr 15, 2011

Carbon nanotubes (CNTs) possess outstanding mechanical, chemical, and electrical properties. They... more Carbon nanotubes (CNTs) possess outstanding mechanical, chemical, and electrical properties. They can be manufactured in many different ways primarily by high temperature catalytic processes with a number of different gases as carbon sources. An overview of manufacturing processes and properties can be found in ref. [1,2]. In the last few years many attempts have been made to introduce these materials in polymeric, [3-5] metallic, [6-9] and ceramic [10-26] matrices in order to use the CNTs as reinforcements of matrices leading to improved composite materials. Although attractive properties have been demonstrated in certain cases, several obstacles for widespread use exist including the high cost for manufacturing, cleaning, and separation/exfoliation of nanotubes and their uniform dispersion in the matrix. In the case of ceramic composites, alumina, [13-15] silicon carbide, [16] silicon nitride, [17] fibers and extrudates, [18-20] and polymer derived ceramics (PDCs) [18,19,21-23] have been used as matrices for the dispersion of CNTs. One of the major problems is the resulting inhomogeneous CNT distribution when composites are formed via conventional ceramic powder processing and sintering. [10] Another viable approach is the in situ formation of CNTs in porous ceramic matrices. [24-26] In ref. [26] the formation of CNTs was demonstrated with supported metal catalysts which were introduced into a gelcast ceramic foam. The catalyst-loaded foam was then thermally treated in a CVD process in methane gas (carbon source), and CNTs were formed in the pores of the ceramic foam. A different approach is the use of preceramic polymers in which hydrocarbons are produced during the pyrolysis. These polymeric precursors are an attractive approach to producing a variety of ceramic shapes including fibers, porous materials, and matrices for composites and coatings. A detailed overview of PDCs including precursor synthesis, thermal conversion, microstructure and characterization, properties, processing, and application is given in ref. [27].

Journal of Physical Chemistry C, Dec 13, 2007

The structure of the intermediate species in the clear solution synthesis of the MFI framework (z... more The structure of the intermediate species in the clear solution synthesis of the MFI framework (zeolite ZSM 5) has been investigated using the characteristic 13 C, 14 N, 15 N, and 2 D spectra of the tetrapropylammonium (TPA) template ions as probes as well as the 29 Si spectra of the silicate species present in samples that can be isolated by centrifugation. Comparison with the corresponding spectra of the final products that can be characterized by X-ray diffraction indicates that there is no evidence for the involvement of nanospecies, as has been proposed, and that crystallization is most probably from an amorphous gel. This conclusion is supported by the lack of deuterium rotational echo double-resonance dephasing of the 29 Si spectra by deuterated TPA of the earliest intermediate species obtained, while it is clearly observed in the final product. These observations indicate that any TPA ions present in the gel phase are not in intimate contact with the silicon nuclei as they would be if in the local MFI environment. This is supported by the very low amount of TPA found by 14 N NMR, which is much less than needed for the proposed nano intermediates and the fact that the TPA present can be removed by simple re-suspension in water and recovery.

Advances in Applied Ceramics, Nov 1, 2009

Inorganic composite membranes were manufactured by partial zeolitisation of polymer derived ceram... more Inorganic composite membranes were manufactured by partial zeolitisation of polymer derived ceramic (PDC) tapes. The PDC tapes, which act as mechanical support and chemical source for the zeolite framework builder at the same time, were prepared by tape casting with a slurry composed of polysiloxanes as preceramic polymers, inert (SiC) and reactive (elemental Si) filler particles, and subsequent pyrolysis in argon or nitrogen atmosphere. The tape porosity and the amount of silicon after pyrolysis, available for zeolite crystallisation were controlled by pyrolysis atmosphere and temperature. The partial transformation of the metallic silicon, contained in the tapes, into zeolite crystals was carried out by hydrothermal treatment of the tapes in an aqueous, alkaline solution containing a so called structure directing agent at 150uC with reaction time between 24 and 96 h. The PDC tapes, the PDC tape/zeolite composites and the influence of the thermal history and pyrolysis atmosphere of the PDC tapes on the zeolite layer properties were characterised by means of solid state characterisation, porometry and chemical analysis. With complementary results from the liquid phase after crystallisation (the so called mother liquor) the main parameters affecting the amount and morphology of the zeolite layers on the PDC foams were identified.

Materials Letters, Dec 1, 2016

The infiltration of cellular oxide-bonded silicon carbide (ob-SiC) ceramics with aqueous copper n... more The infiltration of cellular oxide-bonded silicon carbide (ob-SiC) ceramics with aqueous copper nitrate solutions (Cu(NO 3) 2) under ambient conditions followed by thermal decomposition of Cu(NO 3) 2 into copper oxide (CuO) and subsequent chemical reduction to copper (Cu) metal (MESCAL process) provides an efficient manufacturing process of electrically conducting Cu-SiC foams. Essentially, the electrical conductivity of these Cu-SiC foams is a function of the copper content of the material, which was adjusted via the Cu 2 þ concentration in the infiltration solution and the number of MESCAL cycles. An electrical conductivity of 960 7 69 S m À 1 was obtained after five process cycles with a 3.1 M Cu(NO 3) 2 solution.

Ceramics International, May 1, 2016

The crosslinking behavior of a low viscosity preceramic polymer system consisting of a poly(metho... more The crosslinking behavior of a low viscosity preceramic polymer system consisting of a poly(methoxymethyl)siloxane (1), a hydroxyterminated poly(dimethyl)siloxane (2) and an organo tin catalyst (3) was studied by viscometry and 29 Si-NMR spectroscopy. While the siloxane bond formation in (1) is the desired reaction leading to a high degree of crosslinking necessary for a high ceramic yield after pyrolysis, (2) delivers water for the hydrolysis of the methoxy groups in (1), catalyzed by (3). The increase of the catalyst concentration as well as the increase of the crosslinking temperature lead to a reduction of the gelation time from several hours to several minutes. As crosslinking active species, mainly methoxy groups were identified, and it was found that (1) also bears hydroxy groups.

Chemie Ingenieur Technik, Oct 27, 2011

Zeolithische Molekularsiebe gehören nach wie vor zu den industriell bedeutendsten Adsorbentien. I... more Zeolithische Molekularsiebe gehören nach wie vor zu den industriell bedeutendsten Adsorbentien. In dynamischen, technischen Adsorptionsprozessen ist die Verwendung von Formkörpern unumgänglich. Diese werden konventionell mithilfe von mineralischen Bindemitteln hergestellt. In diesem Artikel werden neuartige, bindemittelfreie Molekularsiebe und deren Vorteile gegenüber den konventionellen, bindemittelhaltigen Produkten beschrieben.

Advanced Engineering Materials, May 17, 2017

Fine-pored, 45 ppi (pores per linear inch) alumina foams are prepared from ceramic slurries with ... more Fine-pored, 45 ppi (pores per linear inch) alumina foams are prepared from ceramic slurries with varying contents of additives (deflocculant, binder) and solid loading following a standardized procedure. Rheological key parameters (yield stress, high-shear viscosity) of the respective slurries are determined by approximation of the experimental flow curves with appropriate rheological models. The resulting ceramic foams are characterized by computed tomography (CT) followed by a morphometric analysis of the reconstruction volume data. The main scope of the work involves the development of a procedure to reliably define the binarization threshold during these morphometric calculations, which is based on the analysis of the differential course of the total porosity results from calculations performed at varying binarization threshold values ("differential thresholding"). A very good match of the CT porosity results with experimental data is achieved, despite the unfavorable CT voxel resolution to foam structure fineness relation. The CT evaluation results are finally correlated to the rheological properties of the respective slurries used in foam manufacturing. The dominant slurry composition parameters are the weight fraction of the ceramic powder and the binder concentration. Increasing binder and solid content result in an increased yield stress and viscosity of the respective dispersion and consequently in a decreased porosity and cell size of the finally manufactured cellular ceramic.

Chemie Ingenieur Technik, Sep 1, 2006

Studies in Surface Science and Catalysis, 2005

ABSTRACT

Studies in Surface Science and Catalysis, 2004

... 2 1.0 0.01 0.24 0.21 0.06 32 160 3 BEA 3 1.0 0.05 0.24 0.21 0.06 32 160 3 BEA + OFF 4 ... 2. ... more ... 2 1.0 0.01 0.24 0.21 0.06 32 160 3 BEA 3 1.0 0.05 0.24 0.21 0.06 32 160 3 BEA + OFF 4 ... 2. O'Connor, CT; Van Steen, E.; Dry, ME, Stud. ... 8. Seijger, GBF, Oudshoom, OL, van Kooten, WEJ, Jansen, J. C , van Bekkum, H., van den Bleek, CM, Calls, HPA, Microporous Mesoporous ...

Chemie Ingenieur Technik, Feb 2, 2016

The metal organic framework material Cu 3 (btc) 2 Á3H 2 O (HKUST-1) was grown on differently acti... more The metal organic framework material Cu 3 (btc) 2 Á3H 2 O (HKUST-1) was grown on differently activated oxide-bonded SiC ceramic foams with varying pore sizes. Activation was performed by an alkaline etching procedure under dissolution of the SiO 2 binder phase in the ob-SiC microstructure leading to an increase in strut surface roughness. The influence of foam pore size, etching conditions (duration, temperature) and the effect of a subsequent alumina coating to increase the coverage with-OH moieties was studied. The activated foams and MOF@ob-SiC composites were characterized by microstructural analysis, H 2 O adsorption and thermal conductivity measurements.

Advances in Science and Technology, Oct 10, 2006

Zeolites find various applications in heterogeneous catalysis, microreactor techniques, sorption ... more Zeolites find various applications in heterogeneous catalysis, microreactor techniques, sorption techniques, ion exchange and more recently in heat pump applications. In common processes zeolites are used as shaped bodies with a size in the millimeter range. Novel processes made it necessary to apply zeolites as coating on inert or reactive bulk or porous substrate materials. In the past fifteen years various methods for zeolite coatings have been developed and adapted to the specific requirements with respect to the process they are to be used and to the specific physical and chemical properties of the support material.

Materials & Design, Nov 1, 2020

Ink was made from C 2 H 6 O 2 and Sb 2 Te 3 through dispersion and homogenization. • Thin (139μm)... more Ink was made from C 2 H 6 O 2 and Sb 2 Te 3 through dispersion and homogenization. • Thin (139μm) and porous (20%) selfsupporting layers (5⋅5cm) were doctor bladed. • Improvement of the thermoelectric power factor to 2097 μW/m⋅K 2 at room temperature. • Results imply possible mass production of thermoelectric thin sheets out of Sb 2 Te 3 .

Microporous and Mesoporous Materials, 2017

Advanced Engineering Materials, 2017

Chemie Ingenieur Technik, Sep 1, 2006

zeichnen sich durch hohe mechanische Stabilität aus und können als Katalysator (TiO 2), Katalysat... more zeichnen sich durch hohe mechanische Stabilität aus und können als Katalysator (TiO 2), Katalysatorträger, Filter für korrosive Medien oder als leichte Strukturelemente auch bei hohen Temperaturen verwendet werden.

Chemie Ingenieur Technik, Aug 14, 2012

Propenoxid ist ein wichtiges Zwischenprodukt der chemischen Industrie. Es wird unter anderem zur ... more Propenoxid ist ein wichtiges Zwischenprodukt der chemischen Industrie. Es wird unter anderem zur Herstellung von verschiedenen Kunststoffen benötigt. Da die aktuell eingesetzten Verfahren zur Produktion von Propenoxid entweder große Mengen unerwünschter Nebenprodukte erzeugen oder in Bezug auf die eingesetzten Ausgangsstoffe sehr kostspielig sind, ist es aus ökonomischer und ökologischer Sicht wünschenswert, Propen auf direktem Weg durch Luftsauerstoff zu epoxidieren. Wie gezeigt werden konnte, ist dies mit geträgerten Goldkatalysatoren möglich. Dieser Beitrag geht der Frage nach, inwiefern titansubstituierte Alumophosphate als Träger für solche Katalysatoren geeignet sind.

Wiley-VCH Verlag GmbH & Co. KGaA eBooks, Mar 24, 2006

Catalytic processes are the driving force in industrial chemistry. More than 80 % of all base che... more Catalytic processes are the driving force in industrial chemistry. More than 80 % of all base chemicals and products have encountered a catalyst (homogeneous or het-erogeneous) during their production or conversion. Most of these processes are het-erogeneously catalyzed, which means ...

Microporous and Mesoporous Materials, Feb 1, 2017

The metal organic framework (MOF) materials HKUST-1, CAU-10, MIL-101(Cr) and UiO-66(Zr) were succ... more The metal organic framework (MOF) materials HKUST-1, CAU-10, MIL-101(Cr) and UiO-66(Zr) were successfully coated onto open cellular silanized alumina and oxide bonded silicon carbide foams by a direct crystallization approach. Two different silanization routes were tested with respect to the functional group of the silane molecule used. For the HKUST-1 and CAU-10 based composite materials the influence of the foam material, its pore size and pore density and its surface chemistry on the amount of deposited MOF material and its water uptake capacity was evaluated. Based on these data in combination with micro computertomograpy results a model was developed to estimate the MOF coating thickness on cellular supports.

Advanced Engineering Materials, Apr 15, 2011

Carbon nanotubes (CNTs) possess outstanding mechanical, chemical, and electrical properties. They... more Carbon nanotubes (CNTs) possess outstanding mechanical, chemical, and electrical properties. They can be manufactured in many different ways primarily by high temperature catalytic processes with a number of different gases as carbon sources. An overview of manufacturing processes and properties can be found in ref. [1,2]. In the last few years many attempts have been made to introduce these materials in polymeric, [3-5] metallic, [6-9] and ceramic [10-26] matrices in order to use the CNTs as reinforcements of matrices leading to improved composite materials. Although attractive properties have been demonstrated in certain cases, several obstacles for widespread use exist including the high cost for manufacturing, cleaning, and separation/exfoliation of nanotubes and their uniform dispersion in the matrix. In the case of ceramic composites, alumina, [13-15] silicon carbide, [16] silicon nitride, [17] fibers and extrudates, [18-20] and polymer derived ceramics (PDCs) [18,19,21-23] have been used as matrices for the dispersion of CNTs. One of the major problems is the resulting inhomogeneous CNT distribution when composites are formed via conventional ceramic powder processing and sintering. [10] Another viable approach is the in situ formation of CNTs in porous ceramic matrices. [24-26] In ref. [26] the formation of CNTs was demonstrated with supported metal catalysts which were introduced into a gelcast ceramic foam. The catalyst-loaded foam was then thermally treated in a CVD process in methane gas (carbon source), and CNTs were formed in the pores of the ceramic foam. A different approach is the use of preceramic polymers in which hydrocarbons are produced during the pyrolysis. These polymeric precursors are an attractive approach to producing a variety of ceramic shapes including fibers, porous materials, and matrices for composites and coatings. A detailed overview of PDCs including precursor synthesis, thermal conversion, microstructure and characterization, properties, processing, and application is given in ref. [27].

Journal of Physical Chemistry C, Dec 13, 2007

The structure of the intermediate species in the clear solution synthesis of the MFI framework (z... more The structure of the intermediate species in the clear solution synthesis of the MFI framework (zeolite ZSM 5) has been investigated using the characteristic 13 C, 14 N, 15 N, and 2 D spectra of the tetrapropylammonium (TPA) template ions as probes as well as the 29 Si spectra of the silicate species present in samples that can be isolated by centrifugation. Comparison with the corresponding spectra of the final products that can be characterized by X-ray diffraction indicates that there is no evidence for the involvement of nanospecies, as has been proposed, and that crystallization is most probably from an amorphous gel. This conclusion is supported by the lack of deuterium rotational echo double-resonance dephasing of the 29 Si spectra by deuterated TPA of the earliest intermediate species obtained, while it is clearly observed in the final product. These observations indicate that any TPA ions present in the gel phase are not in intimate contact with the silicon nuclei as they would be if in the local MFI environment. This is supported by the very low amount of TPA found by 14 N NMR, which is much less than needed for the proposed nano intermediates and the fact that the TPA present can be removed by simple re-suspension in water and recovery.

Advances in Applied Ceramics, Nov 1, 2009

Inorganic composite membranes were manufactured by partial zeolitisation of polymer derived ceram... more Inorganic composite membranes were manufactured by partial zeolitisation of polymer derived ceramic (PDC) tapes. The PDC tapes, which act as mechanical support and chemical source for the zeolite framework builder at the same time, were prepared by tape casting with a slurry composed of polysiloxanes as preceramic polymers, inert (SiC) and reactive (elemental Si) filler particles, and subsequent pyrolysis in argon or nitrogen atmosphere. The tape porosity and the amount of silicon after pyrolysis, available for zeolite crystallisation were controlled by pyrolysis atmosphere and temperature. The partial transformation of the metallic silicon, contained in the tapes, into zeolite crystals was carried out by hydrothermal treatment of the tapes in an aqueous, alkaline solution containing a so called structure directing agent at 150uC with reaction time between 24 and 96 h. The PDC tapes, the PDC tape/zeolite composites and the influence of the thermal history and pyrolysis atmosphere of the PDC tapes on the zeolite layer properties were characterised by means of solid state characterisation, porometry and chemical analysis. With complementary results from the liquid phase after crystallisation (the so called mother liquor) the main parameters affecting the amount and morphology of the zeolite layers on the PDC foams were identified.

Materials Letters, Dec 1, 2016

The infiltration of cellular oxide-bonded silicon carbide (ob-SiC) ceramics with aqueous copper n... more The infiltration of cellular oxide-bonded silicon carbide (ob-SiC) ceramics with aqueous copper nitrate solutions (Cu(NO 3) 2) under ambient conditions followed by thermal decomposition of Cu(NO 3) 2 into copper oxide (CuO) and subsequent chemical reduction to copper (Cu) metal (MESCAL process) provides an efficient manufacturing process of electrically conducting Cu-SiC foams. Essentially, the electrical conductivity of these Cu-SiC foams is a function of the copper content of the material, which was adjusted via the Cu 2 þ concentration in the infiltration solution and the number of MESCAL cycles. An electrical conductivity of 960 7 69 S m À 1 was obtained after five process cycles with a 3.1 M Cu(NO 3) 2 solution.

Ceramics International, May 1, 2016

The crosslinking behavior of a low viscosity preceramic polymer system consisting of a poly(metho... more The crosslinking behavior of a low viscosity preceramic polymer system consisting of a poly(methoxymethyl)siloxane (1), a hydroxyterminated poly(dimethyl)siloxane (2) and an organo tin catalyst (3) was studied by viscometry and 29 Si-NMR spectroscopy. While the siloxane bond formation in (1) is the desired reaction leading to a high degree of crosslinking necessary for a high ceramic yield after pyrolysis, (2) delivers water for the hydrolysis of the methoxy groups in (1), catalyzed by (3). The increase of the catalyst concentration as well as the increase of the crosslinking temperature lead to a reduction of the gelation time from several hours to several minutes. As crosslinking active species, mainly methoxy groups were identified, and it was found that (1) also bears hydroxy groups.

Chemie Ingenieur Technik, Oct 27, 2011

Zeolithische Molekularsiebe gehören nach wie vor zu den industriell bedeutendsten Adsorbentien. I... more Zeolithische Molekularsiebe gehören nach wie vor zu den industriell bedeutendsten Adsorbentien. In dynamischen, technischen Adsorptionsprozessen ist die Verwendung von Formkörpern unumgänglich. Diese werden konventionell mithilfe von mineralischen Bindemitteln hergestellt. In diesem Artikel werden neuartige, bindemittelfreie Molekularsiebe und deren Vorteile gegenüber den konventionellen, bindemittelhaltigen Produkten beschrieben.

Advanced Engineering Materials, May 17, 2017

Fine-pored, 45 ppi (pores per linear inch) alumina foams are prepared from ceramic slurries with ... more Fine-pored, 45 ppi (pores per linear inch) alumina foams are prepared from ceramic slurries with varying contents of additives (deflocculant, binder) and solid loading following a standardized procedure. Rheological key parameters (yield stress, high-shear viscosity) of the respective slurries are determined by approximation of the experimental flow curves with appropriate rheological models. The resulting ceramic foams are characterized by computed tomography (CT) followed by a morphometric analysis of the reconstruction volume data. The main scope of the work involves the development of a procedure to reliably define the binarization threshold during these morphometric calculations, which is based on the analysis of the differential course of the total porosity results from calculations performed at varying binarization threshold values ("differential thresholding"). A very good match of the CT porosity results with experimental data is achieved, despite the unfavorable CT voxel resolution to foam structure fineness relation. The CT evaluation results are finally correlated to the rheological properties of the respective slurries used in foam manufacturing. The dominant slurry composition parameters are the weight fraction of the ceramic powder and the binder concentration. Increasing binder and solid content result in an increased yield stress and viscosity of the respective dispersion and consequently in a decreased porosity and cell size of the finally manufactured cellular ceramic.

Chemie Ingenieur Technik, Sep 1, 2006

Studies in Surface Science and Catalysis, 2005

ABSTRACT

Studies in Surface Science and Catalysis, 2004

... 2 1.0 0.01 0.24 0.21 0.06 32 160 3 BEA 3 1.0 0.05 0.24 0.21 0.06 32 160 3 BEA + OFF 4 ... 2. ... more ... 2 1.0 0.01 0.24 0.21 0.06 32 160 3 BEA 3 1.0 0.05 0.24 0.21 0.06 32 160 3 BEA + OFF 4 ... 2. O'Connor, CT; Van Steen, E.; Dry, ME, Stud. ... 8. Seijger, GBF, Oudshoom, OL, van Kooten, WEJ, Jansen, J. C , van Bekkum, H., van den Bleek, CM, Calls, HPA, Microporous Mesoporous ...

Chemie Ingenieur Technik, Feb 2, 2016

The metal organic framework material Cu 3 (btc) 2 Á3H 2 O (HKUST-1) was grown on differently acti... more The metal organic framework material Cu 3 (btc) 2 Á3H 2 O (HKUST-1) was grown on differently activated oxide-bonded SiC ceramic foams with varying pore sizes. Activation was performed by an alkaline etching procedure under dissolution of the SiO 2 binder phase in the ob-SiC microstructure leading to an increase in strut surface roughness. The influence of foam pore size, etching conditions (duration, temperature) and the effect of a subsequent alumina coating to increase the coverage with-OH moieties was studied. The activated foams and MOF@ob-SiC composites were characterized by microstructural analysis, H 2 O adsorption and thermal conductivity measurements.