Spectroscopy analysis of the active component of chromia-alumina dehydrogenation catalysts

被引：1

作者：

Bekmukhamedov, Giyjaz ^{[1
,2
]}

Igo, Alexander ^{[3
]}

Tuktarov, Rustem ^{[1
]}

Morozov, Vladimir ^{[2
]}

Egorova, Svetlana ^{[1
]}

Kozhevin, Alexander ^{[4
]}

Lamberov, Alexander ^{[1
]}

Yakhvarov, Dmitry ^{[1
,2
]}

机构：

[1] Kazan Fed Univ, Alexander Butlerov Inst Chem, Kremlyovskaya St 18, Kazan 420008, Russia

[2] Russian Acad Sci, Arbuzov Inst Organ & Phys Chem, FRC Kazan Sci Ctr, Arbuzov St 8, Kazan 420088, Russia

[3] Ulyanovsk State Univ, L Tolstoy St 42, Ulyanovsk 432970, Russia

[4] ANO Ctr Strateg Studies Ulyanovsk Reg, Radishcheva St 116A, Ulyanovsk 432071, Russia

来源：

NEW JOURNAL OF CHEMISTRY | 2022年 / 46卷 / 11期

关键词：

LIGHT ALKANES;

D O I：

10.1039/d1nj06117h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The active component of chromia-alumina dehydrogenation catalysts has been studied by Raman and photoluminescence spectroscopy. The stress state at the Al2O3-Cr2O3 interface has been determined by photoluminescence spectroscopy. A model of the spatial distribution of the stresses in Cr2O3 crystals of the catalysts was developed on the basis of the Raman spectroscopy data. Two parameters characterizing this distribution have been determined: P-M and alpha - maximum stress and the rate of the stress drop in Cr2O3 crystals, respectively. It was shown that decrease in the stress at the surface of the Cr2O3 crystals from 0.9 to 0.5 GPa is accompanied by decreasing of the catalytic activity in the dehydrogenation process - the conversion of n-butane to unsaturated derivatives decreases from 27.4% to 23.0%.

引用

页码：4974 / 4978

页数：5

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