A5077361518- Catalysis for Biomass Conversion
- biodegradable polymer synthesis and properties
- Carbon dioxide utilization in catalysis
- Biofuel production and bioconversion
- Enzyme Catalysis and Immobilization
- Zeolite Catalysis and Synthesis
- Catalysis and Hydrodesulfurization Studies
- Polyoxometalates: Synthesis and Applications
- Mesoporous Materials and Catalysis
- Extraction and Separation Processes
TransFurans Chemicals (Belgium)
2021
KU Leuven
2013-2018
Bioscience Research
2015
This article critically reviews the recent developments of applying heterogeneous catalysis for producing bio-based polyester monomers from cellulosic biomass.
A new route to lactide, which is a key building block of the bioplastic polylactic acid, proposed involving continuous catalytic gas-phase transesterification renewable alkyl lactates in scalable fixed-bed setup. Supported TiO2 /SiO2 catalysts are highly selective with only minimal lactide racemization. The solvent-free process allows for easy product separation and recycling unconverted recyclable lactyl intermediates. activity was strongly correlated their optical properties by DR UV/Vis...
Having been inspired by formose-based hypotheses surrounding the origin of life, we report on a novel catalytic route toward series recently discovered four-carbon α-hydroxy acids (AHA) and their esters from accessible renewable glycolaldehyde (GA) in various solvents. The synthesis follows cascade type reaction network, its mechanism with identification rate-determining step was investigated situ 13C NMR. mechanistic understanding led to optimized conditions higher overall rates AHA...
Different Ti-Si catalysts, viz. TiO2 supported on amorphous SiO2 or Si-MCM-41, TiO2-SiO2 xerogels, and Ti zeolites (TS-1 Ti-beta), were compared in terms of activity selectivity for the direct conversion methyl lactate to lactide gas phase. Except Ti-beta, all catalysts exhibit a high 88–92% at conversions below 50%. From DR UV–vis spectroscopy, it is evidenced that catalytic tetrahedral TiO4 sites higher than those polymerized TiO5 octahedral TiO6 counterparts, irrespective catalyst...
We report the use of solid Lewis acid catalysts for conversion tetrose sugars to four-carbon α-hydroxy esters (C4-AHA), which are useful as functional polyester building blocks. Sn-β was by far most active and selective catalyst, yielding up 80% methyl vinyl glycolate (MVG), methyl-4-methoxy-2-hydroxybutanoate (MMHB), α-hydroxy-γ-butyrolactone (HBL) combined at 95% conversion. A very high turnover frequency (TOF) 330 molC4-AHA molSn h–1 attained using Sn-β, a more than 6-fold increase...
Abstract A new route to lactide, which is a key building block of the bioplastic polylactic acid, proposed involving continuous catalytic gas‐phase transesterification renewable alkyl lactates in scalable fixed‐bed setup. Supported TiO 2 /SiO catalysts are highly selective with only minimal lactide racemization. The solvent‐free process allows for easy product separation and recycling unconverted recyclable lactyl intermediates. activity was strongly correlated their optical properties by DR...
Abstract A catalytic process to produce glycolide, the cyclic dimer of glycolic acid (GA), is proposed. Glycolide key building block biodegradable plastic polyglycolic acid. Instead current industrial two‐step route, which involves polycondensation GA and a subsequent backbiting reaction, new route based on gas‐phase transesterification methyl glycolate (MGA) over fixed catalyst bed presented. With specific supported TiO 2 catalysts, high glycolide selectivity 75–78 % can be achieved at...
Abstract Review: 421 refs.