Nitrogen-rich natural gases as direct feedstocks in some prospective methane conversion processes : studies with CH₄-N₂ model mixtures

• Autorzy: Czechowicz D. , Skutil K. , Taniewski M.
• Języki publikacji: EN

Abstrakty

EN

The possibility to use nitrogen-rich natural gases directly, without separation and nitrogen removal, as feedstocks in some prospective novel CH₄ conversion processes has been investigated. Various CH₄-N₂ mixtures containing up to about 90 vol.% of N₂ were used as models for nitrogen-rich natural gases. The possible effect of N₂ content in the feed on the course of methane oxidative coupling to ethylene and ethane over Na₂O/CaO, methane and toluene oxidative cross-coupling to ethylbenzene and styrene over Na₂O/CaO, oxygen-free methane dehydroaromatization to hydrogen, benzene and naphthalene over Mo/HZSM-5 and oxygen-free methane catalytic decomposition to hydrogen and carbon over NiCu/MgO, has been studied. Some detailed results and observed regularities have been reported and discussed. It was shown that in the irreversible processes of methane oxidative coupling and cross-coupling, no effect of CH₄ dilution on the reactants conversion and on the yields and selectivities of the main products formation was observed under experimental conditions, at least up to about 80% of the nitrogen content. In the reversible processes of methane dehydroaromatization and methane catalytic decomposition, proceeding with the increase in the number of moles, it was observed the beneficial rise in the CH₄ conversion and in the products yields with the growing dilution. Thus, it was shown that non-separated nitrogen-rich natural gases could be used as direct feedstocks in the investigated novel processes.

Słowa kluczowe

EN

methane; methane-nitrogen mixtures; nitrogen-rich natural gases; oxidative coupling; oxidative cross-coupling; dehydroaromatization; decomposition of methane

• Wydawca: Centrum Materiałów Polimerowych i Węglowych PAN
• Czasopismo: Polish Journal of Applied Chemistry
• Rocznik: 2008
• Tom: nr 3-4/07,1-2/08
• Strony: 55--70
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

Czechowicz D.

autor

Skutil K.

autor

Taniewski M.

• Silesian University of Technology, Chair of Chemical Organic Technology and Petrochemistry, ul. Krzywoustego 4, 44-101 Gliwice, Poland,

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