A REACTOR FOR CATALYTIC DEHYDROGENATION OF HYDROCARBONS WITH SELECTIVE OXIDATION OF HYDROGEN

摘要

A reactor for catalytic dehydrogenation of dehydrogenatable hydrocar-bons, in particular C3 and/or C4 hydrocarbons, in a hydrocarbon-containingstream, with selective oxidation of hydrogen. The reactor comprises seri-ally connected in the flow direction of the hydrocarbon-containing stream: afirst catalyst zone (2), an oxygen admixing zone (3) provided with a means(5) for separate feeding of an oxygen-containing gas into the hydrocarbon-containing stream, and a second catalyst zone (4). The oxygen admixingzone (3) has a cross section area in the flow direction of the hydrocarbon-containing stream which is from 0.5 % to 75 % of the cross section area ofeach of the two catalysts zones (2, 4), so as to obtain a higher flow velocityin the oxygen-admixing zone (3) than in the catalyst zones. The means (5)for feeding oxygen-containing gas is designed to feed said gas with a flowvelocity which is at least 1 m/s and is up to 200 times higher than the flowvelocity of the hydrocarbon-containing stream in the oxygen-admixing zone.The oxygen-admixing zone (3) is free of catalyst at least in the region adja-cent to the oxygen feeding means (5).