Ricardo Prada Silvy

Norman, Oklahoma, United States Contact Info
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Chasm Advanced Materials

About

Ricardo Prada Silvy is currently the CTO of Chasm Advanced Materials and an Adjunct…

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Experience & Education

  • Chasm Advanced Materials

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Licenses & Certifications

  • Instructor 1 CIED

    PDVSA Petroleos de Venezuela S.A.

  • Strategic / Conceptual Selling

    Miller Heiman

Publications

  • More than 120 articles published in international congress, Journals of catalysis and engineering and Oil &Gas

    Scale up of NiMoP/Al2O3 catalyst for Hydrotreating of Heavy Gas Oil. Oil & Gas Sci. and Tech. IFP 74, 22

    This contribution shows the acquired experience during the scale-up of a NiMoP/cAl2O3 catalyst
    employed for the hydrotreating and mild hydrocracking of heavy gasoil. Three different strategies were adopted for preparing catalyst batches at pilot scale. They consisted on co-impregnation of c-alumina extrudates with aqueous solutions containing Ni and Mo salts and phosphoric acid in one or two successive steps. The textural, chemical composition, mechanical strength, metallic surface…

    This contribution shows the acquired experience during the scale-up of a NiMoP/cAl2O3 catalyst
    employed for the hydrotreating and mild hydrocracking of heavy gasoil. Three different strategies were adopted for preparing catalyst batches at pilot scale. They consisted on co-impregnation of c-alumina extrudates with aqueous solutions containing Ni and Mo salts and phosphoric acid in one or two successive steps. The textural, chemical composition, mechanical strength, metallic surface dispersion and elemental radial distribution profile properties were influenced by the impregnation procedure employed. The co-impregnation with diluted Ni, Mo and P solutions in two successive steps is the best way to prepare the catalyst. This procedure provides a catalyst that exhibits better physico-chemical properties and catalytic activity profile than the other impregnation methods investigated. Heat and mass transfer limitations became very important when preparing catalysts in large quantities. The diffusion intra-particle and extra-particle was observed influenced by the density and viscosity properties of the metallic solution, the liquid-solid contact angle, the reactivity of phosphate, polymolybdate and phosphomolybdate species with the alumina surface hydroxyl groups, the raise of temperatura produced in the solid particles during the initial impregnation step and the porosity properties of the catalyst support. It was concluded that the fine control of the metal distribution on the alumina surface during the impregnation is crucial for producing highly active uniform catalysts.

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Patents

  • More than 30 international patents in catalysts, detergents and carbon nanotube materials.

    US More than 15 commercial products developped.

Honors & Awards

  • 1992 CREATIVITY AWARD, 1993 REPRESENTING THE MORE CREATIVE PROFESIONALS OF INTEVEP

    PDVSA- INTEVEP,

    1993 VENEZUELAN AWARD OF SCIENCE AND TECHNOLOGY, BETWEEN THE FIRST FIVE BEST SCIENTIFIC WORKS.

Languages

  • Spanish

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  • English

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  • French

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