Pd Nanoparticles Encapsulated in Mesoporous HZSM-5 Zeolite for Selective One-Step Conversion of Acetone to Methyl Isobutyl Ketone

  • Rouzana Pulikkal Thumbayil
  • Jerrik MielbyEmail author
  • Søren KegnæsEmail author
Original Paper


Here we report a bifunctional catalyst comprised of Pd nanoparticles encapsulated in a solid acid mesoporous HZSM-5 zeolite for one-step synthesis of methyl isobutyl ketone (MIBK) from acetone at 150 °C and atmospheric pressure. The Pd nanoparticles are encapsulated in conventional HZSM-5 and mesoporous HZSM-5, prepared using a carbon template procedure. The nanoparticles are encapsulated using in situ encapsulation during the zeolite synthesis and post impregnation to investigate the effect of preparation procedure, zeolite confinement and distribution of nanoparticles. Additionally, the influence of Si to Al ratio of HZSM-5 zeolite and hence the effect of acidity was also analyzed. The prepared materials are characterized with various techniques including SEM, TEM, XRF, nitrogen physisorption and XRD among others. Of different materials, palladium nanoparticles encapsulated inside mesoporous zeolite via in situ encapsulation (Pd@MesoHZSM-5) were found to be the most active and highly selective (> 99%) for the formation of MIBK with a conversion of 37%. Moreover, the mesoporous zeolite structure increased the mass transfer and thereby enabling acetone to diffuse easily to the active sites excluding the formation of by-products.


Palladium nanoparticle HZM-5 zeolite Methyl isobutyl ketone (MIBK) Mesoporous Encapsulation 



We thank the Independent Research Fund Denmark (Grant Nos. 5054-00119 and 6111-00237), Villum fonden (Grant No. 13158), and Haldor Topsøe A/S for financial support.

Supplementary material

11244_2019_1153_MOESM1_ESM.docx (175 kb)
Supplementary material 1 (DOCX 175 KB)


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of ChemistryTechnical University of DenmarkKongens LyngbyDenmark

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