Nuclear spin relaxation as a probe of zeolite acidity: a combined NMR and TPD investigation of pyridine in HZSM-5

Autor: Carmine D'Agostino, Neil Robinson, Pierre Bräuer, Andrew P. E. York

Publikováno v: Physical chemistry chemical physics : PCCP. 23(33)

The relative surface affinities of pyridine within microporous HZSM-5 zeolites are explored using two-dimensional 1H nuclear magnetic resonance (NMR) relaxation time measurements. The dimensionless ratio of longitudinal-to-transverse nuclear spin rel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d829fad267df168be6a3a14024205fee
https://pubmed.ncbi.nlm.nih.gov/34190253

Effect of Al content on the strength of terminal silanol species in ZSM-5 zeolite catalysts: A quantitative DRIFTS study without the use of molar extinction coefficients

Autor: Carmine D'Agostino, Pey Ling Ng, Olivia Situmorang, Pierre Bräuer

Publikováno v: Bräuer, P, Situmorang, O, Ng, P L & D'Agostino, C 2018, ' Effect of Al content on the strength of terminal silanol species in ZSM-5 zeolite catalysts : A quantitative DRIFTS study without the use of molar extinction coefficients ', Physical Chemistry Chemical Physics, vol. 20, no. 6, pp. 4250-4262 . https://doi.org/10.1039/c7cp07826a

The strength of terminal hydroxyl Si-OH groups (silanols) in zeolites is important for many non-size-selective catalytic reactions occurring onto the external surface of the zeolite crystals and may often be responsible for catalyst deactivation, e.g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0be37c548ce3d9868a774eaf4fadb90d
http://hdl.handle.net/11585/889057

Maxwell-Stefan diffusion coefficient estimation for ternary systems: an ideal ternary alcohol system

Autor: Geoff D. Moggridge, Tariq Allie-Ebrahim, Pierre Bräuer, Qingyu Zhu, Carmine D'Agostino

Publikováno v: Allie-Ebrahim, T, Zhu, Q, Brauer, P, Moggridge, G D & D'Agostino, C 2017, ' Maxwell-Stefan diffusion coefficient estimation for ternary systems: an ideal ternary alcohol system ', Physical Chemistry Chemical Physics, vol. 19, no. 24, pp. 16071-16077 . https://doi.org/10.1039/c7cp02582c

The Maxwell–Stefan model is a popular diffusion model originally developed to model diffusion of gases, which can be considered thermodynamically ideal mixtures, although its application has been extended to model diffusion in non-ideal liquid mixt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0729d7c63afff0fa5ed4427f14afba76
https://doi.org/10.1039/c7cp02582c

Effect of paramagnetic species on T-1, T-2 and T-1/T-2 NMR relaxation times of liquids in porous CuSO4/Al2O3

Autor: Carmine D'Agostino, Lynn F. Gladden, Pierre Bräuer, Matthew D Crouch, Pavida Charoen-Rajapark

Publikováno v: D'Agostino, C, Brauer, P, Charoen-Rajapark, P, Crouch, M D & Gladden, L F 2017, ' Effect of paramagnetic species on T-1, T-2 and T-1/T-2 NMR relaxation times of liquids in porous CuSO4/Al2O3 ', RSC Advances, vol. 7, no. 57, pp. 36163-36167 . https://doi.org/10.1039/c7ra07165e

The presence of paramagnetic species has a well-known strong effect on the NMR relaxation times of liquids. This is well-known in solution but it is also the case when liquids are confined in porous materials containing paramagnetic impurities deposi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c95ca3955b17c09c2817a22e2481881e
https://doi.org/10.1039/c7ra07165e