Surface properties vs activity of meso-ZrO2 catalyst in chemoselective Meerwein-Ponndorf-Verley reduction of citral: Effect of calcination temperature

Christianah Aarinola Akinnawo, Ndzondelelo Bingwa, Reinout Meijboom

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The catalytic transfer-hydrogenation of citral is a vital chemical process in food flavoring, fragrance, and pharmaceutical industries, that necessitates a high degree of purity of the product. However, the heterogeneous catalyst that is mainly selective to α,β-unsaturated alcohol at atmospheric pressure is still lacking. Herein, we prepared a series of mesoporous ZrO2 via a soft-templated inverse micelle method, using different calcination temperatures 250–600 °C. The effect of the calcination temperature on the intrinsic surface properties of the meso-ZrO2 was revealed by analytical techniques such as N2 adsorption-desorption isotherms, pXRD (powder X-ray diffraction), TEM (transmission electron microscope), and CO2/NH3-TPD (temperature-programmed desorption). The meso-ZrO2 catalysts were compared in the Meerwein-Ponndorf-Verley (MPV) reduction of citral at atmospheric pressure. The meso-ZrO2 calcined at 350 °C presented a superior catalytic activity of 71% citral conversion and 100% selectivity to unsaturated alcohol after 10 h, under optimized reaction conditions. The superior activity is ascribed to the enlarged pore volume, increased surface area, and Lewis acidic sites. The calcination temperature has played a significant role in tailoring the surface properties of the meso-ZrO2, which in turn enhanced the catalytic activity. The meso-ZrO2 catalyst is recyclable, easily regenerated with simple calcination. The meso-ZrO2 shows excellent potential for industrial applications.

Original languageEnglish
Article number110693
JournalMicroporous and Mesoporous Materials
Volume311
DOIs
Publication statusPublished - Feb 2021

Keywords

  • Calcination temperature
  • Citral
  • MPV reduction
  • Mesoporous ZrO
  • Unsaturated alcohol

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials

Fingerprint

Dive into the research topics of 'Surface properties vs activity of meso-ZrO2 catalyst in chemoselective Meerwein-Ponndorf-Verley reduction of citral: Effect of calcination temperature'. Together they form a unique fingerprint.

Cite this