Steam Conversion of Ethane and Methane–Ethane Mixtures in a Membrane Reactor with a Foil Made of a Pd–Ru Alloy

Autor: Didenko, L. P., Babak, V. N., Sementsova, L. A., Dorofeeva, T. V., Chizhov, P. E., Gorbunov, S. V.
Zdroj: Membranes and Membrane Technologies; April 2023, Vol. 5 Issue: 2 p69-79, 11p
Abstrakt: Abstract: The regularities of steam conversion of ethane and methane–ethane mixtures containing 5, 10, and 15% ethane in a reactor with a membrane in the form of a Pd–6% Ru foil with a thickness of 30 μm and a NIAP-03-01 nickel catalyst are investigated. The reaction is studied under the following conditions: 773 and 823 K, feed space velocities of 1800 and 3600 h−1, and steam/feed ratios of 3 and 5. Steam conversion of ethane was studied in a temperature range of 773–853 K. Comparative experiments in a conventional reactor show that, in the membrane reactor, the conversion of the feedstock by the reaction of steam conversion with the formation of H2and CO2increases and its hydrocracking decreases. Evacuation of the permeate leads to an increase in the yield of H2and CO2. When decreasing the steam/feed ratio from 5 down to 3, hydrocracking of the feedstock and rate of formation of carbon deposits increase. The optimum conditions for steam conversion of ethane and methane–ethane mixtures are T= 773–853 and 773 K, respectively, 1800 h–1and steam/feed ratio of 5. The found regularities are similar to those earlier obtained for other types of feedstock (propane–methane mixtures, propane, n-butane, a mixture simulating the average composition of associated petroleum gas) in this membrane reactor.
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