An amine-modified Pd-based catalyst for highly-efficient 2-amylanthraquinone hydrogenation

Hua Yan, Xiaowei Liu, Junhong Zhou, Dawei Li, Xiaoye Yang, Yiming Gu, Hongjiu Su, Shudong Wang

Research output: Contribution to journalArticlepeer-review

Abstract

The development of anthraquinone (AQ) hydrogenation catalysts with high activity and selectivity remains a challenge, but it is critical in industrial applications from both economic and environmental perspectives. In this work, an amine-modified catalyst, i.e., Pd/A/SiO2, was designed and synthesized via grafting 3-aminopropyltrimethoxysilane (APTMS) onto silica support and then loading Pd via the Shiff-base reaction. Multiple techniques were used to thoroughly characterize and analyze the catalysts' structural and electronic properties, such as transmission electron microscopy (TEM), H2 temperature-programmed reduction (H2-TPR), and X-ray photoelectron spectroscopy (XPS), etc. The Pd particle size (3.86 nm) in Pd/A/SiO2 was found to be very close to the reported optimal value, which balances well between the number of active sites and the required size for AQ adsorption; also, the residual carbon species from APTMS improves the hydrophobic properties of the support, which benefits AQ adsorption and anthrahydroquinone (AQH2) desorption; and furthermore, the electron transferred from N to Pd increases the electron density of the latter, favoring the activation of the C[dbnd]O bond in AQ. These factors combine to give a very superior performance of Pd/A/SiO2 for AQ hydrogenation, including a hydrogenation efficiency as high as 15.7 g/L with an intriguing selectivity of 96.1 %, and a good reusability merit within a six-run test, all of which are among the best results reported so far. This work, we believe, provides food for thought in the development of a highly efficient catalyst for AQ hydrogenation.
Original languageEnglish (US)
Pages (from-to)127004
JournalFuel
DOIs
StatePublished - Dec 12 2022

Bibliographical note

KAUST Repository Item: Exported on 2023-02-16
Acknowledgements: The authors are grateful to the National Natural Science Foundation of China for funding (Grant No. 21306184), and also thank the support from Division of Energy Environmental Engineering, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences.

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Organic Chemistry
  • General Chemical Engineering
  • Fuel Technology

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