NDLI: Methane Aromatization over 2 wt% Mo/HZSM-5 in the Presence of O2 and NO

Content Provider	Springer Nature Link
Author	Tan, P.L. Leung, Y.L. Lai, S.Y. Au, C.T.
Copyright Year	2002
Abstract	In the non-oxidative aromatization reaction (temperature = 770 C, flow rate = 34 ml min-1), 2 wt% Mo/HZSM-5 deactivated after 4 h due to severe coking. We observed that with a suitable amount of O2 (≤5.3 vol%) in the methane feed, the catalyst could last for more than 6 h with a ca. 4% yield of aromatics at 770 °C. Depending on the concentration of O2 or the reaction temperature, there are three reaction zones in the catalyst bed: (i) methane oxidation; (ii) methane reforming; and (iii) methane aromatization. CO and H2 produced in the first two zones are accountable for stability amelioration of the catalyst. The addition of NO exhibited similar effects on the reaction. Further increase in O2 (≥8.4 vol%) or NO (≥14.2 vol%) concentration would result in CO and CO2 being the predominant carbon-containing products; C2H4 and C2H6 were generated in small amounts and no aromatics were detected.
Starting Page	251
Ending Page	258
Page Count	8
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	78
Issue Number	1-4
e-ISSN	1572879X
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2002-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Industrial Chemistry/Chemical Engineering Pharmacy
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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Methane Aromatization over 2 wt% Mo/HZSM-5 in the Presence of O2 and NO