Zeolites as catalysts for the production of higher hydrocarbons from methane
The aim of this research project was to explore the potential of zeolite-based catalysts in the oxidative coupling of methane to higher hydrocarbons. From the results of a first screening with zeolites varying in pore structure, dimensionality of the pore system and composition, it could be concluded that the acidity of the catalyst has to be as low as possible in order to achieve good selectivities for the formation of coupling products. Three catalytic systems were developed with no or considerably reduced acidity, viz. Na(2)O-CaO-mixtures supported on AlPO(4)-5, zeolites loaded with Na(2)O by treatment with sodium azide and crystalline metal aluminophosphates with manganese or cobalt in lattice positions. A careful optimisation of the composition of these three systems and the reaction conditions resulted in very active and selective catalysts with maximum yields for coupling products around 13% and very good time on stream stabilities.
Bibliographic Reference: EUR 13857 EN (1991) 58 pp., MF, ECU 4
Record Number: 199111369 / Last updated on: 1994-12-02
Original language: en
Available languages: en