On the mechanism of coke formation in steam cracking—conclusions from results obtained by tracer experiments
1988; Elsevier BV; Volume: 26; Issue: 2 Linguagem: Inglês
10.1016/0008-6223(88)90027-9
ISSN1873-3891
AutoresFrank‐Dieter Kopinke, G. Zimmermann, Siegfried Nowak,
Tópico(s)Thermochemical Biomass Conversion Processes
ResumoThe coke formation from 68 14C-labeled hydrocarbons, each used in small amounts as a constituent of a straight-run naphtha, was systematically investigated at 810°C. Though in line with the pertinent literature the coking rates on Cr-Ni steel are much higher than on quartz or platinum, no significant differences could be found in the selectivity of coke formation on surfaces of different materials. This surprising observation indicates that surface properties obviously control only the number and not the nature of active centers responsible for coke formation on the materials from gas phase hydrocarbon species.
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