A Comparison of the H₃PW₁₂O₄₀/MCM-41 and HY Zeolite for Alkenylation of p-Xylene with Phenylacetylene

Abstract:

The initial activity, selectivity, and especially catalytic stability of mesoporous MCM-41 supported phosphotungstic acid (HPW) prepared by ultrasonic-assisted impregnation (UAI) method and the HY zeolite were contrastively investigated for alkenylation of p-xylene with phenylacetylene in a fixed-bed continuous flow reactor. N2 adsorption-desorption, FT-IR, X-ray diffraction (XRD) and NH3 temperature-programmed (NH3-TPD) desorption characterization techniques were employed to explore the relationship of catalyst nature and catalytic performance in alkenylation. Results illustrate that the as-prepared HPW/MCM-41 catalyst exhibits notably superior catalytic activity, selectivity and stability to microporous HY zeolite, ascribed to its well-ordered mesoporous architecture, appropriate acidic sites and high dispersity of HPW phase.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 377-381
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.377
• Online since: January 2013
• Authors: Zhong Kui Zhao, Yi Tao Dai
• Keywords: Alkenylation, HY Zeolite, MCM-41, Phosphotungstic Acid, Solid Acid, Ultrasonic-Assisted Impregnation

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