Cargando…
Continuous Catalytic Oxidation of Glycerol to Carboxylic Acids Using Nanosized Gold/Alumina Catalysts and a Liquid-Phase Flow Reactor
[Image: see text] Here, we report the development of catalysts comprising highly dispersed Au on an alumina (Al(2)O(3)) support for the oxidation of glycerol to high-value carboxylic acids in a liquid-phase flow reactor. The catalysts were prepared by means of a deposition–precipitation method. To e...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical
Society
2018
|
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6645304/ https://www.ncbi.nlm.nih.gov/pubmed/31458084 http://dx.doi.org/10.1021/acsomega.8b01191 |
_version_ | 1783437435476115456 |
---|---|
author | Mimura, Naoki Muramatsu, Natsumi Hiyoshi, Norihito Sato, Osamu Masuda, Yoshio Yamaguchi, Aritomo |
author_facet | Mimura, Naoki Muramatsu, Natsumi Hiyoshi, Norihito Sato, Osamu Masuda, Yoshio Yamaguchi, Aritomo |
author_sort | Mimura, Naoki |
collection | PubMed |
description | [Image: see text] Here, we report the development of catalysts comprising highly dispersed Au on an alumina (Al(2)O(3)) support for the oxidation of glycerol to high-value carboxylic acids in a liquid-phase flow reactor. The catalysts were prepared by means of a deposition–precipitation method. To ensure that the catalysts could be used for long-term catalytic conversions in a liquid-phase flow reactor, we chose an alumina support with high temperature stability and a particle size (50–200 μm) large enough to prevent leakage of the catalyst from the reactor. One of the five catalysts had a high catalytic activity for the conversion of glycerol to the high-value carboxylic acids, glyceric acid and tartronic acid (conversion of glycerol >70%), and the catalyst retained its catalytic activity over long-term use (up to 1770 min). Pretreatment of the catalyst with fructose, a mild reductant, increased the activity of the catalyst. Scanning transmission electron microscopy revealed three Au species highly dispersed on the surface of the alumina support—Au nanoparticles (mode = 7.5–10 nm), Au clusters (1–2 nm), and atomic Au. |
format | Online Article Text |
id | pubmed-6645304 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American Chemical
Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-66453042019-08-27 Continuous Catalytic Oxidation of Glycerol to Carboxylic Acids Using Nanosized Gold/Alumina Catalysts and a Liquid-Phase Flow Reactor Mimura, Naoki Muramatsu, Natsumi Hiyoshi, Norihito Sato, Osamu Masuda, Yoshio Yamaguchi, Aritomo ACS Omega [Image: see text] Here, we report the development of catalysts comprising highly dispersed Au on an alumina (Al(2)O(3)) support for the oxidation of glycerol to high-value carboxylic acids in a liquid-phase flow reactor. The catalysts were prepared by means of a deposition–precipitation method. To ensure that the catalysts could be used for long-term catalytic conversions in a liquid-phase flow reactor, we chose an alumina support with high temperature stability and a particle size (50–200 μm) large enough to prevent leakage of the catalyst from the reactor. One of the five catalysts had a high catalytic activity for the conversion of glycerol to the high-value carboxylic acids, glyceric acid and tartronic acid (conversion of glycerol >70%), and the catalyst retained its catalytic activity over long-term use (up to 1770 min). Pretreatment of the catalyst with fructose, a mild reductant, increased the activity of the catalyst. Scanning transmission electron microscopy revealed three Au species highly dispersed on the surface of the alumina support—Au nanoparticles (mode = 7.5–10 nm), Au clusters (1–2 nm), and atomic Au. American Chemical Society 2018-10-23 /pmc/articles/PMC6645304/ /pubmed/31458084 http://dx.doi.org/10.1021/acsomega.8b01191 Text en Copyright © 2018 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Mimura, Naoki Muramatsu, Natsumi Hiyoshi, Norihito Sato, Osamu Masuda, Yoshio Yamaguchi, Aritomo Continuous Catalytic Oxidation of Glycerol to Carboxylic Acids Using Nanosized Gold/Alumina Catalysts and a Liquid-Phase Flow Reactor |
title | Continuous Catalytic Oxidation of Glycerol
to Carboxylic Acids Using Nanosized Gold/Alumina Catalysts and a Liquid-Phase
Flow Reactor |
title_full | Continuous Catalytic Oxidation of Glycerol
to Carboxylic Acids Using Nanosized Gold/Alumina Catalysts and a Liquid-Phase
Flow Reactor |
title_fullStr | Continuous Catalytic Oxidation of Glycerol
to Carboxylic Acids Using Nanosized Gold/Alumina Catalysts and a Liquid-Phase
Flow Reactor |
title_full_unstemmed | Continuous Catalytic Oxidation of Glycerol
to Carboxylic Acids Using Nanosized Gold/Alumina Catalysts and a Liquid-Phase
Flow Reactor |
title_short | Continuous Catalytic Oxidation of Glycerol
to Carboxylic Acids Using Nanosized Gold/Alumina Catalysts and a Liquid-Phase
Flow Reactor |
title_sort | continuous catalytic oxidation of glycerol
to carboxylic acids using nanosized gold/alumina catalysts and a liquid-phase
flow reactor |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6645304/ https://www.ncbi.nlm.nih.gov/pubmed/31458084 http://dx.doi.org/10.1021/acsomega.8b01191 |
work_keys_str_mv | AT mimuranaoki continuouscatalyticoxidationofglyceroltocarboxylicacidsusingnanosizedgoldaluminacatalystsandaliquidphaseflowreactor AT muramatsunatsumi continuouscatalyticoxidationofglyceroltocarboxylicacidsusingnanosizedgoldaluminacatalystsandaliquidphaseflowreactor AT hiyoshinorihito continuouscatalyticoxidationofglyceroltocarboxylicacidsusingnanosizedgoldaluminacatalystsandaliquidphaseflowreactor AT satoosamu continuouscatalyticoxidationofglyceroltocarboxylicacidsusingnanosizedgoldaluminacatalystsandaliquidphaseflowreactor AT masudayoshio continuouscatalyticoxidationofglyceroltocarboxylicacidsusingnanosizedgoldaluminacatalystsandaliquidphaseflowreactor AT yamaguchiaritomo continuouscatalyticoxidationofglyceroltocarboxylicacidsusingnanosizedgoldaluminacatalystsandaliquidphaseflowreactor |