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Issue 47, 2019
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Multi-walled carbon nanotube-based composite materials as catalyst support for water–gas shift and hydroformylation reactions

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Abstract

In times of depleting fossil fuel reserves, optimizing industrial catalytic reactions has become increasingly important. One possibility for optimization is the use of homogenous catalysts, which are advantageous over heterogeneous catalysts because of mild reaction conditions as well as higher selectivity and activity. A new emerging technology, supported ionic liquid phase (SILP), was developed to permanently immobilize homogeneous catalyst complexes for continuous processes. However, these SILP catalysts are unable to form freestanding supports by themselves. This study presents a new method to introduce the SILP system into a support made from multi-walled carbon nanotubes (MWCNT). In a first step, SILP catalysts were prepared for hydroformylation as well as low-temperature water–gas shift (WGS) reactions. These catalysts were integrated into freestanding microtubes formed from MWCNTs, with silica (for hydroformylation) or alumina particles (for WGS) incorporated. In hydroformylation, the activity increased significantly by around 400% when the pure MWCNT material was used as SILP support. An opposite trend was observed for WGS, where pure alumina particles exhibited the highest activity. A significant advantage of the MWCNT composite materials is the possibility to coat them with separation layers, which allows their application in membrane reactors for more efficient processes.

Graphical abstract: Multi-walled carbon nanotube-based composite materials as catalyst support for water–gas shift and hydroformylation reactions

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Supplementary files

Article information


Submitted
26 Jun 2019
Accepted
26 Aug 2019
First published
03 Sep 2019

This article is Open Access

RSC Adv., 2019,9, 27732-27742
Article type
Paper

Multi-walled carbon nanotube-based composite materials as catalyst support for water–gas shift and hydroformylation reactions

P. Wolf, M. Logemann, M. Schörner, L. Keller, M. Haumann and M. Wessling, RSC Adv., 2019, 9, 27732
DOI: 10.1039/C9RA04830H

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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    [Original citation] - Published by The Royal Society of Chemistry.

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