Determination of the spatial location of coke in catalysts by a novel NMR approach

Navin Gopinathan; Sean Rigby; Malcolm Greaves; J Lowe; J Wood; L L Dong; P Fantazzini; V Bortolotti; J Karger; P Galvosas

doi:10.1063/1.3562240

Determination of the spatial location of coke in catalysts by a novel NMR approach

Navin Gopinathan, Sean Rigby, Malcolm Greaves, J Lowe, J Wood, L L Dong, P Fantazzini (Editor), V Bortolotti (Editor), J Karger (Editor), P Galvosas (Editor)

Research output: Contribution to conference › Paper › peer-review

Abstract

In this work, a liquid-liquid exchange (LLE) process within nanoporous heterogeneous catalysts has been followed using NMR relaxometry. Under so-called 'metered' supply conditions, when a high affinity liquid (water) displaced a low affinity liquid (cyclohexane) from a nanoporous sol-gel silica, entrapment of the low affinity liquid was observed which was similar to that observed in mercury porosimetry. In a similar experiment, comparing LLE in fresh and coked samples of bimodal Pt-alumina catalyst pellets, it was found that, while for the fresh sample water initially displaced cyclohexane from the smallest pores, as expected under metered conditions, this did not occur for coked catalysts.

Original language	English
Pages	89-92
Number of pages	4
DOIs	https://doi.org/10.1063/1.3562240
Publication status	Published - Mar 2011
Event	10th International Bologna Conference on Magnetic Resonance in Porous Media - Leipzig, Germany Duration: 12 Sept 2010 → 16 Sept 2010

Conference

Conference	10th International Bologna Conference on Magnetic Resonance in Porous Media
Country/Territory	Germany
City	Leipzig
Period	12/09/10 → 16/09/10

Bibliographical note

Proceedings paper from the 10th International Bologna Conference on Magnetic Resonance in Porous Media. 12-16 September 2010. Leipzig, Germany.

Keywords

percolation
phase transitions
porous materials
structure of

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10.1063/1.3562240

Cite this

Gopinathan, N., Rigby, S., Greaves, M., Lowe, J., Wood, J., Dong, L. L., Fantazzini, P. (Ed.), Bortolotti, V. (Ed.), Karger, J. (Ed.), & Galvosas, P. (Ed.) (2011). Determination of the spatial location of coke in catalysts by a novel NMR approach. 89-92. Paper presented at 10th International Bologna Conference on Magnetic Resonance in Porous Media, Leipzig, Germany. https://doi.org/10.1063/1.3562240

Gopinathan, N, Rigby, S, Greaves, M , Lowe, J, Wood, J, Dong, LL, Fantazzini, P (ed.), Bortolotti, V (ed.), Karger, J (ed.) & Galvosas, P (ed.) 2011, 'Determination of the spatial location of coke in catalysts by a novel NMR approach', Paper presented at 10th International Bologna Conference on Magnetic Resonance in Porous Media, Leipzig, Germany, 12/09/10 - 16/09/10 pp. 89-92. https://doi.org/10.1063/1.3562240

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abstract = "In this work, a liquid-liquid exchange (LLE) process within nanoporous heterogeneous catalysts has been followed using NMR relaxometry. Under so-called 'metered' supply conditions, when a high affinity liquid (water) displaced a low affinity liquid (cyclohexane) from a nanoporous sol-gel silica, entrapment of the low affinity liquid was observed which was similar to that observed in mercury porosimetry. In a similar experiment, comparing LLE in fresh and coked samples of bimodal Pt-alumina catalyst pellets, it was found that, while for the fresh sample water initially displaced cyclohexane from the smallest pores, as expected under metered conditions, this did not occur for coked catalysts.",

keywords = "percolation, phase transitions, porous materials, structure of",

author = "Navin Gopinathan and Sean Rigby and Malcolm Greaves and J Lowe and J Wood and Dong, {L L} and P Fantazzini and V Bortolotti and J Karger and P Galvosas",

note = "Proceedings paper from the 10th International Bologna Conference on Magnetic Resonance in Porous Media. 12-16 September 2010. Leipzig, Germany.; 10th International Bologna Conference on Magnetic Resonance in Porous Media ; Conference date: 12-09-2010 Through 16-09-2010",

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doi = "10.1063/1.3562240",

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AU - Gopinathan, Navin

AU - Rigby, Sean

AU - Greaves, Malcolm

AU - Lowe, J

AU - Wood, J

AU - Dong, L L

A2 - Fantazzini, P

A2 - Bortolotti, V

A2 - Karger, J

A2 - Galvosas, P

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PY - 2011/3

Y1 - 2011/3

N2 - In this work, a liquid-liquid exchange (LLE) process within nanoporous heterogeneous catalysts has been followed using NMR relaxometry. Under so-called 'metered' supply conditions, when a high affinity liquid (water) displaced a low affinity liquid (cyclohexane) from a nanoporous sol-gel silica, entrapment of the low affinity liquid was observed which was similar to that observed in mercury porosimetry. In a similar experiment, comparing LLE in fresh and coked samples of bimodal Pt-alumina catalyst pellets, it was found that, while for the fresh sample water initially displaced cyclohexane from the smallest pores, as expected under metered conditions, this did not occur for coked catalysts.

AB - In this work, a liquid-liquid exchange (LLE) process within nanoporous heterogeneous catalysts has been followed using NMR relaxometry. Under so-called 'metered' supply conditions, when a high affinity liquid (water) displaced a low affinity liquid (cyclohexane) from a nanoporous sol-gel silica, entrapment of the low affinity liquid was observed which was similar to that observed in mercury porosimetry. In a similar experiment, comparing LLE in fresh and coked samples of bimodal Pt-alumina catalyst pellets, it was found that, while for the fresh sample water initially displaced cyclohexane from the smallest pores, as expected under metered conditions, this did not occur for coked catalysts.

KW - percolation

KW - phase transitions

KW - porous materials

KW - structure of

UR - http://dx.doi.org/10.1063/1.3562240

U2 - 10.1063/1.3562240

DO - 10.1063/1.3562240

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T2 - 10th International Bologna Conference on Magnetic Resonance in Porous Media

Y2 - 12 September 2010 through 16 September 2010

ER -

Determination of the spatial location of coke in catalysts by a novel NMR approach

Abstract

Conference

Bibliographical note

Keywords

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In-Situ Catalytic Upgrading of Heavy Crude and Bitumen: Optimisation of Novel Capri Reactor

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Determination of the spatial location of coke in catalysts by a novel NMR approach

Abstract

Conference

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Projects

In-Situ Catalytic Upgrading of Heavy Crude and Bitumen: Optimisation of Novel Capri Reactor

Cite this