2017
DOI: 10.1016/j.ces.2017.04.051
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Abstract: Spatially-resolved and unresolved magnetic resonance measurements are used in combination with a partial least squares regression (PLSR) method to measure chemical composition within catalyst pellets during the 1-octene hydrogenation reaction occurring in a fixed bed of 0.3 wt% Pd/Al 2 O 3 catalyst pellets. The PLSR method is used to discriminate between chemical species within and external to the void space of the catalyst pellets. The spatiallyresolved data show that the hydrogenation and isomerisation react… Show more

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Cited by 12 publications
(5 citation statements)
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“…There are however no facilities of maintaining bubble sizes in such reactors, and once gas has passed the dissolution zones, bubble coalescence occurs readily. The determinations of gas-liquid or liquid-solid mass transfer coefficients in packed beds were performed in systems involving either nonreaction schemes, for example, absorption/desorption of O 2 or CO 2 in water, [34][35][36][37] or actual reactions. 38,39 Iliuta et al compiled mass transfer data from more than 3,200 experiments in 52 gasliquid systems, with over 60 packing sizes/geometries and 17 column diameters 40 ; however, there were neither information on where dissolved gas concentration was measured nor on energy dissipation rates in trickle bed reactors.…”
Section: Trickle Bed Reactorsmentioning
confidence: 99%
“…There are however no facilities of maintaining bubble sizes in such reactors, and once gas has passed the dissolution zones, bubble coalescence occurs readily. The determinations of gas-liquid or liquid-solid mass transfer coefficients in packed beds were performed in systems involving either nonreaction schemes, for example, absorption/desorption of O 2 or CO 2 in water, [34][35][36][37] or actual reactions. 38,39 Iliuta et al compiled mass transfer data from more than 3,200 experiments in 52 gasliquid systems, with over 60 packing sizes/geometries and 17 column diameters 40 ; however, there were neither information on where dissolved gas concentration was measured nor on energy dissipation rates in trickle bed reactors.…”
Section: Trickle Bed Reactorsmentioning
confidence: 99%
“…With this method temperature can be mapped by using ethylene glycol filled glass capillaries [128]. Zheng et al developed a method to calculate liquid-solid mass transfer coefficients and map inter-and intra-pellet chemical composition within fixed-bed reactors by spaceresolved 13 C Distortionless Enhancement by Polarisation Transfer ( 13 C DEPT) pulse sequence NMR; the partial least squares regression method was used to discriminate between intra-and inter-pellet species [129]. This allowed them to detect changes in selectivity along the reactor during 1-octene hydrogenation and product accumulation inside the 0.3 wt.% Pd/Al2O3 catalyst, attributed to mass transfer limitations.…”
Section: Mapping the Fluid Phase Composition And States During Operationmentioning
confidence: 99%
“…(a) bed flooded with liquid 1-octene, and (b) bed during 1-octene hydrogenation reaction. Reproduced with permission from[129].…”
mentioning
confidence: 99%
“…In this work, an NMR measurement employing the pulsed field gradient (PFG) approach is used. Magnetic resonance techniques are highly suitable to the study of fluids contained within porous materials, , having been previously demonstrated to be able to determine in situ fluid compositions, chemical surface interaction strengths, , fluid flow properties, and catalytic reaction dynamics , in porous media.…”
Section: Introductionmentioning
confidence: 99%