Some properties of MgO and catalytic performance in oxidative coupling of methane

• Autorzy: Taniewski M. , Kuś S.
• Języki publikacji: EN

Abstrakty

EN

The catalytic performance of unpromoted MgO in oxidative coupling of methane to C(2)+ hydrocarbons (OCM) and a controversial question of possible MgO properties/performance relationship were studied. The properties and structure of several MgO samples of different origin (BET surface area and pore size distribution, surface morphology by electron scanning microscopy, phase characteristics by thermo-gravimetry, identification of impurities by AAS) were determined. Tests carried out in the small-scale laboratory unit with silica tubular reactor at 760°C, demonstrated the diversity of catalytic performance of applied MgO samples in OCM C(2) selectivity, in particular). It was shown that the surface area and the structure of MgO were not the main factors responsible for the diversity of catalytic performance. The content or absence of Ca compounds in applied MgO samples appeared to be the main factor. The presence of Ca compounds led to the increase in C(2) selectivity and activity of MgO. Similar effects were achieved by introduction of various alkalies, water, etc. to MgO. It was concluded that the variation in the basicity could be a decisive factor responsible for observed differences between MgO samples regarding their selectivity and activity in OCM.

Słowa kluczowe

EN

magnesium oxide; catalytic performance; oxidative coupling; methane

PL

tlenek magnezowy; katalizator; sprzęganie utleniające; metan

• Wydawca: Centrum Materiałów Polimerowych i Węglowych PAN
• Czasopismo: Polish Journal of Applied Chemistry
• Rocznik: 2000
• Tom: Vol. 44, nr 4
• Strony: 181--194
• Opis fizyczny: Bibliogr. 11 poz.

Twórcy

autor

Taniewski M.

• Institute of Organic Chemistry and Technology, Silesian Technical University, ul. Krzywoustego 4, 44-101Gliwice, Poland

autor

Kuś S.

• Institute of Organic Chemistry and Technology, Silesian Technical University, ul. Krzywoustego 4, 44-101Gliwice, Poland

Bibliografia

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