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Processes 2015, 3(1), 98-112; doi:10.3390/pr3010098

Ag/SiO2- and Ag/Co3O4-Based Monolithic Flow Microreactors for Hydrogenation of Dyes: Their Activity and Stability

Department of Chemistry, the University of Alabama, Tuscaloosa, AL 35487-0336, USA
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editor: Volker Hessel
Received: 31 December 2014 / Revised: 6 February 2015 / Accepted: 9 February 2015 / Published: 16 February 2015
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Abstract

Silver nanoparticles supported on hierarchically porous silica and cobalt oxide monoliths have previously been shown to be catalytically active for the hydrogenation of common organic dyes in batch studies. This work presents a detailed investigation of the activity and stability of these monoliths during the hydrogenation of eosin-Y in a continuous flow microreactor. The silver-containing monoliths showed excellent catalytic activity that reached a plateau after a period of approximately 6 h. From SEM particle size distribution studies of the catalysts before and after water and hexane were flowed through them, it was determined that under reaction conditions, silver was removed both by washing off of particles and by dissolution of silver. View Full-Text
Keywords: catalyst; flow; hydrogenation; microreactor; monolith; nanoparticle catalyst; flow; hydrogenation; microreactor; monolith; nanoparticle
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hakat, Y.; Kotbagi, T.V.; Bakker, M.G. Ag/SiO2- and Ag/Co3O4-Based Monolithic Flow Microreactors for Hydrogenation of Dyes: Their Activity and Stability. Processes 2015, 3, 98-112.

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