Solvent free acetalization of glycerol with formaldehyde over hierarchical zeolite of BEA topology

The hierarchical H/BEA zeolites were prepared by postsynthesis treatment. The portion of the parent H/BEA zeolite was treated with aqueous 0.1 M NaOH solution with different alkali volume to H/BEA zeolite weight (5, 10, 30,150, and 300 mL/g) ratios. The physicochemical properties of samples were eva...

Full description

Saved in:
Bibliographic Details
Published in:Environmental progress 2018-03, Vol.37 (2), p.797-807
Main Authors: Sonar, Shilpa K., Shinde, Akash S., Asok, Aswathy, Niphadkar, Prashant S., Mayadevi, S., Joshi, Praphulla N., Bokade, Vijay V.
Format: Article
Language:English
Subjects:
1,3‐dioxalane
Acidity
Ammonia
Catalysts
Catalytic activity
Catalytic converters
desilication
Desorption
Formaldehyde
Fourier transforms
Glycerol
H/BEA
Infrared spectroscopy
Magnetic resonance spectroscopy
NMR
Nuclear magnetic resonance
PH model
Physicochemical properties
Powder
Pyridines
Solvents
Sorption
Spectroscopy
Spectrum analysis
Topology
Zeolites
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The hierarchical H/BEA zeolites were prepared by postsynthesis treatment. The portion of the parent H/BEA zeolite was treated with aqueous 0.1 M NaOH solution with different alkali volume to H/BEA zeolite weight (5, 10, 30,150, and 300 mL/g) ratios. The physicochemical properties of samples were evaluated by powder X‐ray diffraction, Pyridine Fourier transform infrared spectroscopy, NH3 temperature programme desorption, Nitrogen adsorption/desorption isotherms, and magic angle spinning nuclear magnetic resonance spectroscopy. The catalytic performance of various catalysts was investigated in solvent free acetalization of glycerol with formaldehyde. Among all the catalysts, a hierarchical H/BEA prepared by treating H/BEA with 5 mL aqueous 0.1 M NaOH solution per gram of H/BEA exhibited the highest specific surface area and high acidity. This optimal hierarchical H/BEA5 catalyst has shown an excellent catalytic activity with glycerol conversion of 78% and 1,3 dioxalane selectivity of 85% under mild operating parameters than reported. H/BEA5 was found to be highly stable and recyclable. The acetalization of glycerol with formaldehyde follows first order reversible using PseudoHomogeneous model. In present study, the activation energy for this reaction is found to be 46.95 KJmol−1 which is lower than reported. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 797–807, 2018
ISSN:1944-7442
1944-7450
DOI:10.1002/ep.12742