کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9610342 | 47172 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In situ MRI of the structure and function of multiphase catalytic reactors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: In situ MRI of the structure and function of multiphase catalytic reactors In situ MRI of the structure and function of multiphase catalytic reactors](/preview/png/9610342.png)
چکیده انگلیسی
NMR imaging (MRI) was used to study the distribution of the liquid phase in an operating trickle bed reactor using hydrogenation of α-methylstyrene or n-octene-1 as representative examples. In a single pellet reactor, the existence of oscillating regimes under unchanged external conditions was shown. The experiments with packed beds have demonstrated the non-uniform distribution of the liquid phase over the bed, the presence of partially liquid-filled or completely dry catalyst particles in the operating reactor, and the existence of liquid phase transport between liquid-filled and dry catalyst particles. Detection of spatially resolved NMR spectra was used to characterize chemical conversion variations within the operating reactor. Preliminary MRI results for an operating monolithic reactor were obtained. It was found that MRI can be used to directly image solid materials using NMR signal detection of nuclei other than 1H. In particular, imaging of alumina using 27Al NMR signal appears highly promising for the development of novel MRI applications in chemical engineering and catalysis, including spatially resolved NMR thermometry.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 105, Issues 3â4, 15 August 2005, Pages 464-468
Journal: Catalysis Today - Volume 105, Issues 3â4, 15 August 2005, Pages 464-468
نویسندگان
Igor V. Koptyug, Anna A. Lysova, Renad Z. Sagdeev, Valery A. Kirillov, Alexander V. Kulikov, Valentin N. Parmon,