Drying supported catalyst models

Figure 9.2 Rh 3d XPS spectra of a) RhCI3 x H2O on tantalum, and of a model catalyst prepared by adsorbing Rh complexes derived from RhCl3 x H20 in water on an AI2O3/AI model support after b) adsorption and drying, c-e) reduction at the indicated temperatures and 0 subsequent exposure to air at room temperature. The dashed line represents the Rh 3d spectrum of the reduced catalyst (from Borg el al. [4]).

The structural parameters of the complexes were studied in the dry and swollen states by WAXS, SAXS, DSC, nitrogen BET adsorption, ISEC and pycnometry. The original polymer structure changed during complex formation to materials of higher porosity. The relationship between the support structure and catalyst activity and selectivity was studied in model reactions, namely, hydrosilylation of alkenes, dienes and alkynes (Scheme 11.6). 

Integrated multiple process steps for generating the nanostmctured catalyst support films into a single pass, dry web-coating, pilot plant process. Completed MEA fabrication cost model based on existing pilot production process and equipment. 

Application of ordered mesoporous materials as model supports to study catalyst preparation by impregnation and drying... 

In the present work, we investigated the influence of the metal precursor and of the nature of the support on the performences of ruthenium catalysts for the wet air oxidation of p-hydroxybenzoic (p-HBZ) acid chosen as a model of phenolic pollutants. Titanium and zirconium oxides were selected as supporting materials. The preparation method adopted for supports was sol-gel combined with the use of supercritical drying. The motivation of such combination is to prepare aerogel supports with high BET surface area and unique morphological and chemical properties [9,10]. 

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