Investigation of Isobutane Dehydrogenation on CrOx/MCM-41 Catalyst

Authors

  • Zuhal Erol Ministry of Labor and Social Security
  • Saliha Cetinyokus Kilicarslan Gazi University
  • Meltem Dogan Gazi University

DOI:

https://doi.org/10.20450/mjcce.2020.1842

Keywords:

Isobutane dehydrogenation, CrOx/MCM-41, hydrothermal synthesis

Abstract

The syntheses of MCM-41 (Mobil Composition of Matter No. 41) supported chromium oxide cat-alysts at different chromium concentrations (4–10 % by mass) were carried out hydrothermally. The aim of this study was to determine the effect of chromium concentration in the catalyst structure on the chro-mate types and chromium oxidation states, as well as the activity of the catalyst in the isobutane dehydro-genation reaction. Inactive α-Cr2O3 crystals for isobutane dehydrogenation were shown to increase in the catalyst structure as the chromium loading increased. The highest amount of Cr6+ on the catalyst surface was detected in the catalyst (H4-MCM-41) with 4 % chromium by mass. Catalytic tests (T = 600 °C, P = atmospheric pressure, WHSV = 26 h–1) were performed under fixed bed reactor conditions. The high-est isobutane conversion (~60 %) and selectivity (~80 %) were observed on the H4-MCM-41 catalyst, which had the highest amount of Cr6+ and monochromate structures. Catalyst deactivation was not due to coke deposition but, rather, was caused by the formation of inactive α-Cr2O3 crystal structures.

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Published

2020-05-30

How to Cite

Erol, Z., Cetinyokus Kilicarslan, S., & Dogan, M. (2020). Investigation of Isobutane Dehydrogenation on CrOx/MCM-41 Catalyst. Macedonian Journal of Chemistry and Chemical Engineering, 39(1), 109–118. https://doi.org/10.20450/mjcce.2020.1842

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Section

Chemical Engineering