Influence of the Brønsted Acidity on the Ring Opening of Decalin for Pt-USY Catalysts
A challenging hot topic faced by the oil refinery industry is the upgrading of low-quality distillate fractions, such as light cycle oil (LCO), in order to meet current quality standards for diesel fuels. An auspicious technological alternative entails the complete saturation of the aromatic structu...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2019-09-01
|
Series: | Catalysts |
Subjects: | |
Online Access: | https://www.mdpi.com/2073-4344/9/10/786 |
id |
doaj-2b35172f92184f7797a9cdaf8e0d8e0c |
---|---|
record_format |
Article |
spelling |
doaj-2b35172f92184f7797a9cdaf8e0d8e0c2020-11-25T02:42:10ZengMDPI AGCatalysts2073-43442019-09-0191078610.3390/catal9100786catal9100786Influence of the Brønsted Acidity on the Ring Opening of Decalin for Pt-USY CatalystsLech Walesa Oliveira Soares0Sibele Berenice Castellã Pergher1Instituto de Química, Laboratório de Peneiras Moleculares (LABPEMOL), Universidade Federal do Rio Grande do Norte, Natal 59078-970, RN, BrazilInstituto de Química, Laboratório de Peneiras Moleculares (LABPEMOL), Universidade Federal do Rio Grande do Norte, Natal 59078-970, RN, BrazilA challenging hot topic faced by the oil refinery industry is the upgrading of low-quality distillate fractions, such as light cycle oil (LCO), in order to meet current quality standards for diesel fuels. An auspicious technological alternative entails the complete saturation of the aromatic structures followed by the selective cleavage of endocyclic carbon-carbon bonds in the formed naphthenic rings (selective ring opening—SRO). This work reports the influence of Brønsted acid sites of platinum-ultra stable Y zeolite (Pt-USY) catalysts in the SRO of decalin as a model naphthenic feed. A maximum combined yield to selective ring opening products (ROP: C10-alkylcycloalkanes + OCD: C10-alkanes) as high as 28.6 wt% was achieved for 1.6Pt-NaUSY-im catalyst. The molar carbon distribution curve of the hydrocracked (C<sub>9-</sub>) products varied from M-shaped for 1.4Pt-USY-im catalyst, indicating mainly C−C bond cleavage of the ring opening products with one remaining naphthenic ring via carbocations and the paring reaction, to not M-shaped for the 1.6Pt-NaUSY-im catalyst, where carbon-carbon bond cleavage occurs preferentially through a hydrogenolysis mechanism on metal sites. High (hydro)thermal stability and secondary mesoporosity of the 1.6Pt-NaUSY-im catalysts make this system highly prospective for upgrading low-quality real distillate feeds.https://www.mdpi.com/2073-4344/9/10/786ring openingdecalinPt-USY catalystsBrønsted acidity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lech Walesa Oliveira Soares Sibele Berenice Castellã Pergher |
spellingShingle |
Lech Walesa Oliveira Soares Sibele Berenice Castellã Pergher Influence of the Brønsted Acidity on the Ring Opening of Decalin for Pt-USY Catalysts Catalysts ring opening decalin Pt-USY catalysts Brønsted acidity |
author_facet |
Lech Walesa Oliveira Soares Sibele Berenice Castellã Pergher |
author_sort |
Lech Walesa Oliveira Soares |
title |
Influence of the Brønsted Acidity on the Ring Opening of Decalin for Pt-USY Catalysts |
title_short |
Influence of the Brønsted Acidity on the Ring Opening of Decalin for Pt-USY Catalysts |
title_full |
Influence of the Brønsted Acidity on the Ring Opening of Decalin for Pt-USY Catalysts |
title_fullStr |
Influence of the Brønsted Acidity on the Ring Opening of Decalin for Pt-USY Catalysts |
title_full_unstemmed |
Influence of the Brønsted Acidity on the Ring Opening of Decalin for Pt-USY Catalysts |
title_sort |
influence of the brønsted acidity on the ring opening of decalin for pt-usy catalysts |
publisher |
MDPI AG |
series |
Catalysts |
issn |
2073-4344 |
publishDate |
2019-09-01 |
description |
A challenging hot topic faced by the oil refinery industry is the upgrading of low-quality distillate fractions, such as light cycle oil (LCO), in order to meet current quality standards for diesel fuels. An auspicious technological alternative entails the complete saturation of the aromatic structures followed by the selective cleavage of endocyclic carbon-carbon bonds in the formed naphthenic rings (selective ring opening—SRO). This work reports the influence of Brønsted acid sites of platinum-ultra stable Y zeolite (Pt-USY) catalysts in the SRO of decalin as a model naphthenic feed. A maximum combined yield to selective ring opening products (ROP: C10-alkylcycloalkanes + OCD: C10-alkanes) as high as 28.6 wt% was achieved for 1.6Pt-NaUSY-im catalyst. The molar carbon distribution curve of the hydrocracked (C<sub>9-</sub>) products varied from M-shaped for 1.4Pt-USY-im catalyst, indicating mainly C−C bond cleavage of the ring opening products with one remaining naphthenic ring via carbocations and the paring reaction, to not M-shaped for the 1.6Pt-NaUSY-im catalyst, where carbon-carbon bond cleavage occurs preferentially through a hydrogenolysis mechanism on metal sites. High (hydro)thermal stability and secondary mesoporosity of the 1.6Pt-NaUSY-im catalysts make this system highly prospective for upgrading low-quality real distillate feeds. |
topic |
ring opening decalin Pt-USY catalysts Brønsted acidity |
url |
https://www.mdpi.com/2073-4344/9/10/786 |
work_keys_str_mv |
AT lechwalesaoliveirasoares influenceofthebrønstedacidityontheringopeningofdecalinforptusycatalysts AT sibeleberenicecastellapergher influenceofthebrønstedacidityontheringopeningofdecalinforptusycatalysts |
_version_ |
1724774857069035520 |