Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : deactivation


Catalytic Reaction of Ethanol into Light Olefins Over 2wt%CuO/HZSM-5

Fanar G. Hashim G. Hashim

Engineering and Technology Journal, 2019, Volume 37, Issue 2B, Pages 41-44
DOI: 10.30684/etj.37.2B.2

There was increasing in the international needing for fossil fuel, which is formed from nonrenewable materials such as crude oil. Bio-ethanol considered one of the materials that can be produced from renewable sources like the fermentation of sugar cane. 2wt% CuO doped HZSM-5 has been modified by the impregnation method. All experimental runs have conducted at 500 °C, 1 atmosphere pressure and WHSV 3.5 h-1 in a fixed bed reactor. Catalyst, which modified in this work, was analyzed by SEM and XRD as well as TGA experiment. The analysis hydrocarbons products have done by gas chromatographs provided with flame ionization detector (FID) and thermal conductivity detector (TCD). It has been studied CuO doped HZSM-5 catalyst gives higher ethanol conversion and yield especially light olefins as compared to HZSM-5 parent catalyst. In addition, reduces the coke formation over HZSM-5, therefore, enhanced the life of HZSM-5 catalyst.
HZSM-5, ethanol to hydrocarbons, Catalyst, coke, deactivation

A Deactivation Correlation for Platinum Y-Zeolite in n-Hexane Isomerization

Haiyam Mohammed A. Al-Raheem

Engineering and Technology Journal, 2011, Volume 29, Issue 8, Pages 1451-1462

The objective of the present work is to realize the kinetic modeling regarding
deactivation of Pt-HY zeolite and monitor the isomerization reaction of n-hexane. The
catalyst has been prepared with o.4% Pt and evaluated during the isomerization reaction
of n-hexane. Based on the results of catalytic investigation, a kinetic model was proposed
to deactivate the catalyst by coke formation. The present method provides information on
apparent overall kinetics as well as deactivation parameters and would seem to provide a
rapid method for screening of reaction/deactivation behavior. Accordingly the
deactivation order was found to be 3.72. The obtained correlation of deactivation predicts
the activity pattern under the applied reaction conditions, closely mimics those observed
experimentally, and spans those obtained from empirical correlations.