Synthesis of Ozone-Safe Freons and Methods for Improving the Russian Industrial Catalyst for Their Production Full article
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Catalysis in Industry
ISSN: 2070-0504 , E-ISSN: 2070-0555 |
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| Output data | Year: 2010, Volume: 2, Number: 4, Pages: 307-314 Pages count : 8 DOI: 10.1134/S2070050410040033 | ||||
| Tags | chromium-magnesium catalyst, Halocarbon-125, hydrofluorination, perchloroethylene, Refrigerant-134a, trichloroethylene | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | The Ministry of Industry and Commerce | PB07/382/NTB/K |
Abstract:
Industrially important reactions of gas-phase synthesis of ozone-safe freons of the ethane family-hydrofluorination of perchloroethylene into pentafluoroethane (Halocarbon-125) and trichloroethylene into 1,1,1,2-tetrafluoroethane (Refrigerant-134a) on an Cr-Mg catalyst were investigated for to improve the Russian industrial Cr-Mg catalyst for freon production. The influence of reaction conditions—temperature, contact time, pressure, etc.—on the rate and selectivity of reactions was studied. The mechanism of reactions is discussed on the basis of the dependences obtained with regard to multistage nature of processes. The computational method for assessing the optimal content of the active component and specific surface were used. The optimal content of the active component and catalyst activity were shown to increase with increasing specific surface of the support, MgF2. Thus, an increase in the specific surface of MgF2 from 100 to 200 m2/g may result in increased activity by a factor of almost 2. However, obtaining such highly disperse MgF2 is difficult; moreover, the catalyst would be poorly thermostable. Therefore, the possibilities of considerable enhancing the activity of industrial Cr-Mg catalysts are limited by the existing technology. Significant enhancement in the properties of the catalyst of gas-phase synthesis of freons is possible upon a change in the method of preparing the catalyst and the chemical composition of the support.
Cite:
Trukshin I.G.
, Barabanov V.G.
, Novgorodov V.N.
, Zirka A.A.
, Simonova L.G.
, Reshetnikov S.I.
, Isupova L.A.
Synthesis of Ozone-Safe Freons and Methods for Improving the Russian Industrial Catalyst for Their Production
Catalysis in Industry. 2010. V.2. N4. P.307-314. DOI: 10.1134/S2070050410040033 WOS Scopus РИНЦ OpenAlex
Synthesis of Ozone-Safe Freons and Methods for Improving the Russian Industrial Catalyst for Their Production
Catalysis in Industry. 2010. V.2. N4. P.307-314. DOI: 10.1134/S2070050410040033 WOS Scopus РИНЦ OpenAlex
Original:
Трукшин И.Г.
, Барабанов В.Г.
, Новгородов В.Н.
, Зирка А.А.
, Симонова Л.Г.
, Решетников С.И.
, Исупова Л.А.
Синтез озонобезопасных хладонов и пути усовершенствования отечественных промышленных катализаторов для их производства
Катализ в промышленности. 2010. №4. С.26-33. РИНЦ ANCAN
Синтез озонобезопасных хладонов и пути усовершенствования отечественных промышленных катализаторов для их производства
Катализ в промышленности. 2010. №4. С.26-33. РИНЦ ANCAN
Dates:
| Submitted: | Mar 17, 2010 |
| Published print: | Dec 1, 2010 |
| Published online: | Jan 16, 2011 |
Identifiers:
| Web of science: | WOS:000433658700003 |
| Scopus: | 2-s2.0-79251627573 |
| Elibrary: | 16677886 |
| OpenAlex: | W2070657424 |