In Situ Monitoring of Heterogeneous Catalytic Hydrogenation via 129Xe NMR Spectroscopy and Proton MRI

被引：12

作者：

Burueva, Dudari B. ^{[1
,2
]}

Pokochueva, Ekaterina V. ^{[1
,2
]}

Wang, Xinpei ^{[3
,5
]}

Filkins, Max ^{[4
,5
]}

Svyatova, Alexandra ^{[1
,2
]}

Rigby, Sean P. ^{[4
]}

Wang, Chengbo ^{[3
]}

Pavlovskaya, Galina E. ^{[5
,6
]}

Kovtunov, Kirill V. ^{[1
,2
]}

Meersmann, Thomas ^{[5
,6
]}

Koptyug, Igor V. ^{[1
,2
]}

机构：

[1] Int Tomog Ctr SB RAS, 3A Inst Skaya St, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia

[3] Univ Nottingham Ningbo China, Fac Sci & Engn, 199 Taikang East RD, Ningbo 315100, Zhejiang, Peoples R China

[4] Univ Nottingham, Dept Chem & Environm Engn, Nottingham NG7 2RD, England

[5] Univ Nottingham, Sir Peter Mansfield Imaging Ctr, Nottingham NG7 2RD, England

[6] Univ Nottingham, Sch Med, Div Resp Med, Nottingham NG7 2HU, England

来源：

ACS CATALYSIS | 2020年 / 10卷 / 02期

基金：

英国医学研究理事会; 俄罗斯科学基金会;

关键词：

NMR thermometry; heterogeneous hydrogenation; hyperpolarization; xenon; parahydrogen; NUCLEAR-MAGNETIC-RESONANCE; PARAHYDROGEN-INDUCED POLARIZATION; CHEMICAL-SHIFTS; TEMPERATURE-DEPENDENCE; XENON NMR; THERMOMETRY; PHASE; REACTORS; VISUALIZATION; COMBUSTION;

D O I：

10.1021/acscatal.9b05000

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ability to use molecular hydrogen, H-2, as a buffer gas in spin exchange optical pumping of noble gases enables the production of hydrogen gas containing a low percentile (5%) of hyperpolarized (HP) Xe-129 as a tracer for in situ NMR spectroscopy of hydrogenation reactions. It is demonstrated that the xenon chemical shift, observed in the porous space of Pt-containing alumina pellets, can be used to monitor the temperature changes under rapidly progressing, nonsteady-state conditions during start-up of the catalytic reaction. Standard proton MR imaging was successfully applied to provide in situ evaluation of conversion for the catalyst used in this work.

引用

页码：1417 / 1422

页数：11

共 68 条

[1] Calibration of methylene-referenced lipid-dissolved xenon frequency for absolute MR temperature measurements [J].