Selective Catalytic Transfer Hydrogenolysis of Glycerol to 2-Isopropoxy-Propan-1-Ol over Noble Metal Ion-Exchanged Mordenite Zeolite

Bhupendra Kumar Singh,Seungdon Kwon,Yongseok Kim,Kyungsu Na

doi:10.3390/catal9110885

Bhupendra Kumar Singh, Seungdon Kwon + Show 2 more

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https://doi.org/10.3390/catal9110885

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Journal: Catalysts	Publication Date: Oct 25, 2019
Citations: 11	License type: CC BY 4.0

Affiliation: Chonnam National University

Abstract

This study investigated the selective conversion of glycerol to 2-isopropoxy-propan-1-ol over noble metal ion-exchanged mordenite zeolites (RuMOR, RhMOR, and PdMOR) as heterogeneous catalysts via catalytic transfer hydrogenolysis (CTH) using propan-2-ol as the solvent, hydrogen supplier, and reactive coupling reagent with glycerol. The catalytic reactions were performed at 140 °C under inert conditions with a 0.5 MPa initial pressure of N2. A single product, 2-isopropoxy-propan-1-ol, was catalytically generated without any appreciable by-products. The catalytic results were reproducible, and the catalysts exhibited good recyclability.

Highlights

The use of renewable biomass resources for various chemical production processes provides an avenue for chemical industries to reduce their sole dependence on waning fossil-based resources and to alleviate CO2 emissions [1]
The X-ray diffraction (XRD) patterns of all the noble metal ion-exchanged MOR zeolites (i.e., XMOR(ion-ex) where X is Ru, Pd, or Rh) and the corresponding calcined samples showed that the pristine structure of the MOR framework remained intact after the introduction of various noble metals and subsequent calcination
No new XRD peaks originating from the noble metals were observed, proposing the very small particle size of the noble metals introduced into the MOR zeolites

Summary

Introduction

The use of renewable biomass resources for various chemical production processes provides an avenue for chemical industries to reduce their sole dependence on waning fossil-based resources and to alleviate CO2 emissions [1]. The production of sustainable fuel and chemicals from biomass feedstocks is an attractive approach compared to the use of conventional petroleum-based fuel and chemicals [2]. Biodiesel production through transesterification of vegetable oils cogenerates glycerol on a large scale (~10%). Glycerol is currently considered as one of the most promising platform chemicals because of its non-toxic and biodegradable properties [4]. The high demand for and production of biodiesel has resulted in an oversupply of glycerol, reducing the average price in the current chemical market [5]

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