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Alkylation of Benzene by Methanol: Thermodynamics Analysis for Designing and Designing for Enhancing the Selectivity of Toluene and Para-Xylene

  • Peng Dong
  • Zeyu Li
  • Dongliang Wang
  • Xiaorui Wang
  • Yongqi Guo
  • Guixian Li
  • Dongqiang Zhang
Article
  • 28 Downloads

Abstract

The process of benzene/methanol alkylation reaction was studied thermodynamically based on functional group contribution method of Benson. Results show that ortho-xylene (OX), Ethyl-benzene (EB) and tri-methylbenzene (TMB) are the main byproduct in alkylation of benzene by methanol and the suppression of OX, EB and TMB over hierarchical porous HZSM-5 or other types of acidic solid catalysts still remains a great challenge. To overcome these limitations, we modified hierarchical ZSM-5 with ruthenium (Ru) to evaluate the alkylation of benzene with methanol in a fixed-bed continuous flow reactor. It was found that the presence of a small amount of Ru in ZSM-5 catalyst would largely suppress the formation of EB, reduce the selectivity of OX and TMB, and also extend greatly the live time of the catalyst. Alkylation of benzene by methanol: thermodynamics analysis for designing and designing for enhancing the selectivity of toluene and para-xylene.

Graphical Abstract

Alkylation of benzene by methanol: thermodynamics analysis for designing and designing for enhancing the selectivity of toluene and para-xylene

Keywords

Benzene alkylation OX, EB and TMB suppression Ru/HZSM-5 Catalyst stability Thermodynamics analysis 

Notes

Acknowledgements

We acknowledge financial support from the Science and Technology Support Project of Gansu Province (Grant. No. 1604GKCD026) and the National Nature Science Foundation of China (Grant Nos. 212006065; 21666018).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Peng Dong
    • 1
    • 2
  • Zeyu Li
    • 3
  • Dongliang Wang
    • 1
  • Xiaorui Wang
    • 2
  • Yongqi Guo
    • 1
  • Guixian Li
    • 1
  • Dongqiang Zhang
    • 1
  1. 1.College of Petrochemical TechnologyLanzhou University of TechnologyLanzhouPeople’s Republic of China
  2. 2.Lanzhou Petrochemical College of Vocational TechnologyLanzhouPeople’s Republic of China
  3. 3.School of Chemical EngineeringLanzhou UniversityLanzhouPeople’s Republic of China

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