Gas-Phase Epoxidation of Butadiene: Effect of the Concentration and Distribution of Cesium on the Properties of the Ag/α-Al2O3 Catalyst Full article
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Catalysis in Industry
ISSN: 2070-0504 , E-ISSN: 2070-0555 |
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| Output data | Year: 2012, Volume: 4, Number: 2, Pages: 85-92 Pages count : 8 DOI: 10.1134/S207005041202002X | ||
| Tags | 1,3-Butadiene, Ag catalyst, Cesium, Epoxidation | ||
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Abstract:
Using the wellknown patent methods, we have synthesized 1,3butadiene epoxidation α-Al2O3
supported catalysts containing 15 wt % of Ag and 250–1500 ppm of Cs (Johnson Matthey, H16P07). The physicochemical properties of samples are systematically studied by varying the dispersion of supported silver, the amount of an introduced promoter, and its distribution over the surface of a catalyst. Catalytic tests of samples show that the optimum amount of a promoter depends directly on the surface of a catalyst. With optimum promotion, the steadystate activity of catalysts is determined by the dispersion of supported silver. In the course of catalytic tests, it is established that the shape of kinetic curves is governed by the excess or lack of Cs in a catalyst, thus providing a method for optimizing the concentration of the promoter. An analysis of the energy dispersion spectra (EDS) is applied for the first time to study the distribution of Cs over the surface
of promoted catalysts. It is shown that thermal treatment favors the uniform distribution of a promoter over the surface of a catalyst and shortens the time required to attain its steadystate activity in catalytic tests. In our work, the steadystate productivity of catalysts reaches 0.5 g of 3,4epoxy1butene per gram of the catalyst per hour, thus exceeding the claimed patent values.
Cite:
Afanasev D.S.
, Larina T.V.
, Kuznetsova N.I.
Gas-Phase Epoxidation of Butadiene: Effect of the Concentration and Distribution of Cesium on the Properties of the Ag/α-Al2O3 Catalyst
Catalysis in Industry. 2012. V.4. N2. P.85-92. DOI: 10.1134/S207005041202002X WOS Scopus РИНЦ OpenAlex
Gas-Phase Epoxidation of Butadiene: Effect of the Concentration and Distribution of Cesium on the Properties of the Ag/α-Al2O3 Catalyst
Catalysis in Industry. 2012. V.4. N2. P.85-92. DOI: 10.1134/S207005041202002X WOS Scopus РИНЦ OpenAlex
Original:
Афанасьев Д.С.
, Ларина Т.В.
, Кузнецова Н.И.
Газофазное эпоксидирование бутадиена: влияние содержания и распределения цезия на свойства катализатора Ag/α-Al2O3
Катализ в промышленности. 2011. №6. С.21-27. RSCI РИНЦ ANCAN
Газофазное эпоксидирование бутадиена: влияние содержания и распределения цезия на свойства катализатора Ag/α-Al2O3
Катализ в промышленности. 2011. №6. С.21-27. RSCI РИНЦ ANCAN
Dates:
| Submitted: | May 30, 2011 |
| Published print: | Apr 1, 2012 |
| Published online: | Jun 27, 2012 |
Identifiers:
| Web of science: | WOS:000433660500001 |
| Scopus: | 2-s2.0-84866518565 |
| Elibrary: | 20483612 |
| OpenAlex: | W2155393030 |