Surface acidity of VPO catalysts

• Autorzy: Grinenko, S. , Stoch, J. , Podobiński, J. , Zazhigalov, V. A. , Mikołajczyk, M.
• Języki publikacji: EN

Abstrakty

EN

In the study of vanadium-phosphorus catalysts and related substances with the TPD/QMS of ammonia the higher resolution spectra have been obtained. They show the presence at the catalysts surface of two well resolved bands of weakly bonded ammonia (120-140° C) tentatively assigned to two kinds of surface phosphate groups of different acidity and the band of much stronger bonded ammonia (200° C) assigned to vanadate groups. Introduction of bismuth atoms increases the number of active phosphate groups and the strength of their acid function. The effect of lanthanum additives is opposite.

Słowa kluczowe

PL

katalizator; wanad; fosfor; kwasowość

EN

catalyst; vanadium-phosphorous; acidity

• Czasopismo: Bulletin of the Polish Academy of Sciences. Chemistry
• Rocznik: 2000
• Tom: Vol. 48, No. 2
• Strony: 145-151
• Opis fizyczny: Bibliogr. 17 poz.

Twórcy

autor

Grinenko, S.

autor

Stoch, J.

autor

Podobiński, J.

autor

Zazhigalov, V. A.

autor

Mikołajczyk, M.

• Ukrainian-Polish Laboratory of Catalysis Institute of Sorption and Problems of Endoecology, National Academy of Sciences of Ukraine, Prospekt Gen. Naumowa 13, 252680, Kiev, Ukraine