![Kinetics of the catalytic hydrogenation of d-fructose over a CuO-ZnO catalyst [An article from: Chemical Engineering Journal]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR83FU.jpg)
Kinetics of the catalytic hydrogenation of d-fructose over a CuO-ZnO catalyst [An article from: Chemical Engineering Journal]
Book Details
PublisherElsevier
ISBN / ASINB000RR83FU
ISBN-13978B000RR83F5
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Chemical Engineering Journal, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Kinetics of d-fructose hydrogenation over a copper catalyst (61wt% CuO and 39wt% ZnO) in aqueous solutions was studied. The hydrogenation experiments were carried out batchwise in a three-phase laboratory-scale reactor (300ml, Parr Co.), operating at 35-65bar and between 90 and 130^oC. The main hydrogenation products were mannitol and its epimer, sorbitol. Also, a minor isomerization of fructose to glucose was observed. In the operating regime studied, the reaction rate showed a second order dependency with respect to the hydrogen pressure. Mannitol selectivity at the experimental range varied from 60 to 68%. The selectivity values improved slightly, as the hydrogen pressure increased or the reaction temperature decreased. The effect of catalyst loading and catalyst deactivation during consecutive hydrogenation batches was also studied. Catalyst characterization studies (nitrogen adsorption BET, XPS, SEM and particle size analysis) were carried out for a better understanding of the catalyst deactivation and reduction processes. The fitting of the experimental data to the kinetic model was carried out by Modest software using a combined Simplex-Levenberg-Marquardt method. The proposed kinetic model was able to predict the experimental concentrations of fructose and mannitol as well as the by-products sorbitol and glucose with a better than 95% degree of explanation.
Description:
Kinetics of d-fructose hydrogenation over a copper catalyst (61wt% CuO and 39wt% ZnO) in aqueous solutions was studied. The hydrogenation experiments were carried out batchwise in a three-phase laboratory-scale reactor (300ml, Parr Co.), operating at 35-65bar and between 90 and 130^oC. The main hydrogenation products were mannitol and its epimer, sorbitol. Also, a minor isomerization of fructose to glucose was observed. In the operating regime studied, the reaction rate showed a second order dependency with respect to the hydrogen pressure. Mannitol selectivity at the experimental range varied from 60 to 68%. The selectivity values improved slightly, as the hydrogen pressure increased or the reaction temperature decreased. The effect of catalyst loading and catalyst deactivation during consecutive hydrogenation batches was also studied. Catalyst characterization studies (nitrogen adsorption BET, XPS, SEM and particle size analysis) were carried out for a better understanding of the catalyst deactivation and reduction processes. The fitting of the experimental data to the kinetic model was carried out by Modest software using a combined Simplex-Levenberg-Marquardt method. The proposed kinetic model was able to predict the experimental concentrations of fructose and mannitol as well as the by-products sorbitol and glucose with a better than 95% degree of explanation.
