Effect of Addition of K, Rh and Fe Over Mo/HZSM-5 on Methane Dehydroaromatization Under Non-oxidative Conditions View Full Text


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Article Info

DATE

2019-04

AUTHORS

Vaidheeshwar Ramasubramanian, Daniel J. Lienhard, Hema Ramsurn, Geoffrey L. Price

ABSTRACT

Methane dehydroaromatization was studied over a series of K, Rh and Fe promoted 10 wt% Mo/HZSM-5 catalysts with different promoter loadings of 0.5, 1 and 1.5 wt% at 750 °C in a recirculating batch reactor. All the catalysts were reduced in H2 at 750 °C prior to methane activation. K, Rh and Fe- promoted Mo/HZSM-5 catalysts were prepared by sequential impregnation. N-propylamine-temperature programmed desorption confirmed the significant modification in the acidity of the catalyst upon addition of K. Compared to 10 wt% Mo/HZSM-5, the conversion of CH4 remained nearly unchanged for 1 wt% K-promoted catalyst but decreased by ~ 46% for 1 wt% Rh promoted catalyst and by ~ 4.3% for Fe-promoted catalyst after 255 min of reaction. The conversion of CH4 further decreased with increase in K and Rh loading but increased with increase in Fe loading. Compared to Rh and Fe-promoted catalysts, K-promoted catalyst exhibited better selectivity for C6H6 after 255 min of reaction. The temperature programmed oxidation results revealed that K promoted catalyst significantly reduced coking. 1 wt% K added to 10 wt% Mo/HZSM-5 exhibited optimum performance, where the conversion of CH4 was ~ 28%, selectivity of C6H6 was ~ 50% while the selectivity of carbon was ~ 47% after 255 min of reaction. More... »

PAGES

950-964

Journal

TITLE

Catalysis Letters

ISSUE

4

VOLUME

149

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10562-019-02697-8

DOI

http://dx.doi.org/10.1007/s10562-019-02697-8

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112091765


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Turtle is a human-readable linked data format.

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RDF/XML is a standard XML format for linked data.

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