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    • Keywords

       

      Cr-MOF; liquid phase alkylation of toluene; shape selective; single site

    • Abstract

       

      P-xylene is one of petrochemical products eagerly in demand. Until recently, the process for preparing of p-xylene was done via gas-phase toluene methylation reaction at high temperature using a strong acid catalyst. In this work, high surface area, shape-selective and single-site MIL-101(Cr) was used as acatalyst to perform toluene methylation reaction in a liquid phase at low reaction temperature (60-120 °C). Toluene conversion and p-xylene selectivity are up to 50% and 90%, respectively. Under the optimum operating conditions; 1:1 toluene: methanol molar ratio, the reaction temperature is 120 °C. The catalyst wassynthesized via the hydrothermal method and the MIL-101 structure was confirmed by different analytical techniques: TGA, XRD, FTIR and BET surface area. The remarkably high toluene conversion and xylene selectivity at a low reaction temperature, in comparison to previous research, was attributed to the suppression of side reactions that could convert methanol to linear hydrocarbons, and to the inhibition of p-xylene isomerization. This suppression can be attributed to the single site properties and to the uniform pore sizedistribution of the prepared MIL 101 catalyst

    • Author Affiliations

       

      HOWAIDA MAMDOUH ABD EL SALAM1 DALIA RADWAN ABD EL-HAFIZ2

      1. Analysis and Evaluation Division, Egyptian Petroleum Research Institute, PO Box 11727, Nasr City, Cairo, Egypt
      2. Catalysis Department, Petroleum Refining Division, Egyptian Petroleum Research Institute, PO Box 11727, Nasr City, Cairo, Egypt
    • Dates

       
  • Journal of Chemical Sciences | News

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