Short communication: acidity of Ni-W catalyst supported on zirconium doped mesoporous SBA-15

Springer Science and Business Media LLC - Tập 18 - Trang 651-654 - 2010
Zhengli Tan1, Adam A. Donaldson1, Zisheng Zhang1
1Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, Canada

Tóm tắt

Ordered hexagonal mesoporous x-ZrSi SBA-15 (where x is the Zr/Si ratio) with 0 < x < 0.12 was successfully synthesized, pelletized and impregnated with a Ni-W bifunctional metal to fabricate a series of novel ring-opening catalysts suitable for the conversion of excess aromatics in petroleum refining. Results obtained from N2 isotherm techniques and TEM analysis indicate that these x-ZrSi supports have high surface areas and narrow pore size distributions with well-ordered hexagonal pore structures. NH3-TPD revealed an increase in acidity with Zirconium content for the x-ZrSi support, with a plateau expected as x approaches 0.16. While deposition of Ni-W onto the x-ZrSi support resulted in a significant increase in acidity for low values of x, the impact was reduced as the Zirconium content increased. When normalized with the catalyst surface area, the acidity of both the support and impregnated catalyst was equivalent for a given total metal content to silica ratio.

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Springer Science and Business Media LLC

Tập 18

651-654

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