In Situ MRI Study of 1-octene Isomerisation and Hydrogenation within a Trickle-bed Reactor
In Situ MRI Study of 1-octene Isomerisation and Hydrogenation within a Trickle-bed Reactor
复制标题
滴流床反应器内 1-辛烯异构化和氢化的原位 MRI 研究
DOI：
10.1007/s10562-005-7522-2
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发表时间：
2005
影响因子：
2.8
通讯作者：
L. Gladden
中科院分区：
文献类型：
--
作者：
A. Sederman;M. Mantle;C. P. Dunckley;Zhenyu Huang;L. Gladden
13C-DEPT-MRI用于提供在滴流床反应器内发生的烯烃加氢反应过程中烯烃异构化和氢化的fi第一空间图谱。实现了将磁共振成像(MRI)脉冲序列的空间分辨率与13C Dept磁共振波谱脉冲序列相结合的脉冲序列，使得能够记录自然丰度13C物种的空间分辨率13C谱。对13C核的观察提供了光谱，由此实现了异构化和氢化产物的直接鉴定fi阳离子。13C核的化学位移范围比1H核大得多。这项技术是关于1-辛烯在1-辛烯上加氢的
1wt%Pd/Al_2O_3催化剂在这项初步研究中，我们展示了这项技术的能力，以确定改变氢fl的低速率对沿床长发生的异构化和加氢过程的演变的影响。
13C DEPT-MRI is used to provide the first spatial mapping of alkene isomerisation and hydrogenation during an alkene hydrogenation reaction occurring within a trickle-bed reactor. The implementation of a pulse sequence combining the spatial resolution of a magnetic resonance imaging (MRI) pulse sequence with a 13C DEPT magnetic resonance spectroscopy pulse sequence enables spatially resolved 13C spectra to be recorded of natural abundance 13C species. Observation of the 13C nucleus, which has a much larger chemical shift range than the 1H nucleus, provides spectra from which direct identification of the products of isomerisation and hydrogenation is achieved. This technique is illustrated with respect to the hydrogenation of 1-octene over a
1 wt% Pd/Al2O3 catalyst. In this preliminary study we demonstrate the ability of this technique to identify the effect of changing the hydrogen flow rate on the evolution of isomerisation and hydrogenation processes occurring along the length of the bed.