engleski

Influence of microstructure to high catalyst activity

Ideal catalyst has to combine a number of essential propertise which are summarized as: high catalyst activity for desired reactions, maximum selectivity for the preferred reactions, good physical strength, good gas flow properties as pressure drop and heat transfer and stability of including resistance to poisons and ability to with stand plant up set to ensure a long life. The obtained i. e. the characteristic x-ray diffraction patterns show change in phase composition and diffraction profile line, at 1000 C reduced broadening and splitting of line and exhibited new diffraction line. According to Rooksby this change has been the result of enlargement to the crystallite size. The similar observation was made during the measurement of relative intensities of analytical line PtL betha1 and ReL alpha1. heating led not only to the growth of the Y-aluminia crystals and structural transformation but also reactions and changes in morphology.

microstructure; hihg catalyst activity; x-ray diffraction; surface morphology

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