Decane reforming reaction over Pt, Ir, Pt-Ir and Pt-Ni bimetallic catalysts supported on Y-zeolite

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Pt, Ir, Pt-Ir and Pt-Ni bimetallic catalysts supported on NaY- and HY-zeolite were examined as a catalyst for producing gasoline from n-decane via simultaneous reforming and cracking. The catalysts were prepared by calcining and reducing metal-ion-exchanged Y-zeolite with O-2 and H-2 at 300 degrees C, respectively. Thus prepared catalysts were characterized by hydrogen chemisorption and temperature programmed desorption of ammonia. Pt-Ni/NaY and Pr-Ir/NaY bimetallic catalysts offered the improved activity maintenance compared to Pt/NaY monometallic catalyst. The catalysts supported on HY-zeolite showed higher selectivity toward C-5-C-7 and skeletal isomers of C-5-C-7 and C-6-C-10 than those of the catalysts supported on NaY-zeolite, which is a desired characteristic for increasing octane value of gasoline these days. However, deactivation with reaction time was much more pronounced on HY-zeolite-supported catalyst. When the catalyst was presulfided with H2S, the stability with time on stream was enhanced and the selectivity was quite different from that of the catalyst before presulfiding. The acidity of Y-zeolite and presulfiding of catalyst greatly influenced the activity, selectivity and stability of Pt, Ir, Pt-Ir and Pt-Ni bimetallic catalysts supported on Y-zeolite in n-decane reforming reaction.
Publisher
KOREAN INST CHEM ENGINEERS
Issue Date
1996-07
Language
English
Article Type
Article
Keywords

HYDROCARBON-CONVERSION CATALYSTS; NAY ZEOLITE; CLUSTERS; RHENIUM; SELECTIVITY; SULFUR

Citation

KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.13, no.4, pp.351 - 355

ISSN
0256-1115
URI
http://hdl.handle.net/10203/250720
Appears in Collection
CBE-Journal Papers(저널논문)
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