Results 181 to 190 of about 2,530 (217)

?????????? ???????????????????????? ???? ?????????????????????? ???????????????? VPO-?????????????? ??????????????????????????

2019
?? ?????????????????????? ???????????????????? ?????????????????????? VPO-?????????????? ??????????????????????, ?????????????????? Mo, Bi, Te, Zr, La, ???? ???????????????????? ???????? ????????????-?????????????? ?????????????????????? ???????????????? ??????, ????????, ????- ??????????????????????????, ??????????????????. ???????????????? ???????????
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Metrological examination of technical documents at the ?Soyuzrezinotekhnika? VPO

Measurement Techniques, 1979
The existing and newly developed normative and technical documentation (NTD) is now being metrologically examined at nearly all the enterprises of the industry. In order to provide methodic guidance to'the enterprises metrological services, the local organization drafted and adopted the "Methodic directives en the procedure for metrological examination
V. A. Mel'nichenko, I. N. Novitskaya, A. I. Sidorenko   +2 more
openaire   +1 more source

Oxidative dehydrogenation of ethane on promoted VPO catalysts

Applied Catalysis A: General, 2003
Abstract Me-doped VPO (Me=Zr, Bi, and La–Bi) catalysts have been prepared, characterized and tested in the oxidation of ethane. The main of these catalysts present a high selectivity in the oxidative dehydrogenation (OXDH) of ethane to ethylene. However, O-containing partial reaction products were not observed.
B. Solsona, V.A. Zazhigalov, J.M. López Nieto, I.V. Bacherikova, E.A. Diyuk   +4 more
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Physicochemical characterization and catalytic behavior of VPO formulations

Applied Catalysis, 1991
Abstract The effect of the preparation method of VPO catalysts, with varying phosphorus/vanadium ratios, on the solid composition and structure was studied using electron probe microanalysis (EPMA ), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). Their catalytic performance was evaluated using a flow reactor system.
L.M. Cornaglia, C. Caspani, E.A. Lombardo   +2 more
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Modification of VPO catalysts for oxidative dehydrogenation of ethane

Theoretical and Experimental Chemistry, 1999
Based on the previously discussed hypothesis concerning the mechanism of conversion of paraffins, we have modified the structure of VPO catalysts by developing the (220) plane of VOHPO4·0.5H2O and introducing a bismuth additive. We have shown that this leads to an increase in the P/V ratio on the surface, an increase in the number of Lewis centers and ...
V. A. Zazhigalov, J. M. Lopez Nieto, B. Solsona, G. A. Komashko, I. V. Bacherikova, J. Stoch   +5 more
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AlPO4 as a support material for VPO catalysts

Journal of Catalysis, 1989
Abstract AlPO4 has been demonstrated to be a good support material for vanadium-phosphorus oxide (VPO) catalysts in selective oxidation of 1-butene to maleic anhydride. The advantages of using AlPO4 as the support include (i) strong thermal stability suitable for the highly exothermic reaction, (ii) large pore diameter to minimize pore diffusion ...
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VPO/Strauss

The Musical Times, 1966
Peter Stadlen, Franz Grasberger
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Vanadium(III)‐monophosphat VPO

Zeitschrift für Chemie, 1979
Gerhard Ladwig, Karl‐Heinz Jost, Klaus Schlesinger   +2 more
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Redoxeigenschaften von VPO‐Ammoxidationskatalysatoren

Chemie Ingenieur Technik, 1999
Andreas Martin, Bernhard Lücke
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Mechanochemistry in preparation of VPO catalysts for paraffins oxidation

1998
It is shown that mechanochemical treatment can be a progressive method to activate both VPO precursor and starting compounds for VPO or MeVPO catalysts synthesis to get a noticeable improvement in VPO catalytic properties.
openaire   +1 more source