Catalytic ring opening of naphthenic structures

Nylén, Ulf; Pawelec, B.; Boutonnet, Magali; Fierro, J.L.G.

doi:10.1016/j.apcata.2005.10.050

Cited by 21 publications

(21 citation statements)

References 54 publications

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“…No high cetane number's products derived from hydrogenolysis/ring-opening reactions (such as alkylbenzenes, alkylcyclohexanes, methylindanes and methylindenes, spyrodecane) were detected. This is expected since metallic Pt/Pd show relatively low activity for cleaving unsubstituted C-C bonds [3,4]. The very small selectivity toward decalin observed for all catalysts is probably because tetralin hydrogenation to decalin do not have sufficient time to occur due to a very low contact time employed (0.022 h) and competitive adsorption of naphthalene and tetralin on the active sites [51].…”

Section: Product Distribution In Naphthalene Hydmentioning

confidence: 85%

“…According to the IUPAC classification, the nitrogen adsorption-desorption isotherms of the ASA-supported catalysts are of Type IVa with hysteresis loop between a Type H1 and H2 [4,41]. The former type of hysteresis loop is typical for materials having a narrow distribution of uniform pores whereas the latter is associated with materials having complex interconnected networks of pores with different shape and size.…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

“…Unfortunately, the Pt and Pd catalysts are easy poisoned even by few ppm of sulfur limiting their use to two-stage catalytic process involving initially hydrodesulphurization (HDS) and hydrodenitrogenation (HDN) followed by hydrodearomatization (HDA) and selective ring opening to improve the cetane number [3][4][5][6]. Thus, the challenge is to tailor Pt or Pd catalyst possessing a high tolerance to S-poisoning.…”

Section: Introductionmentioning

confidence: 98%

“…Since both parameters are still below the new diesel specifications, the ring opening of naphthenic structures is practiced with the aim to upgrading heavy petroleum fractions [2]. Thus, it was recently shown that under industrially employed conditions the selective ring opening of naphthenic structures could be successfully performed using a Pt-Ir-based catalyst [3,4].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhancement of naphthalene hydrogenation over PtPd/SiO2–Al2O3 catalyst modified by gold

Pawelec

Parola

Thomas

et al. 2006

Journal of Molecular Catalysis A: Chemical

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Section: Product Distribution In Naphthalene Hydmentioning

confidence: 85%

Section: Characterization Of the Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancement of naphthalene hydrogenation over PtPd/SiO2–Al2O3 catalyst modified by gold

Pawelec

Parola

Thomas

et al. 2006

Journal of Molecular Catalysis A: Chemical

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“…NylØn et al have shown that ceria appears to be the best support among several one as Al 2 O 3 , SiO 2 -Al 2 O 3 , ZrO 2 , MgO and SiO 2 . [265,266] The higher activity and selectivity towards ring opening of indane are obtained with a 2 wt % Pt 5 Ir 95 /CeO 2 catalyst. The desired products are 2-ethyltoluene and n-propylbenzene, when the naphthenic ring has been cleaved only once.…”

Section: Ring Openingmentioning

confidence: 99%

Ceria‐Based Solid Catalysts for Organic Chemistry

Vivier¹,

Duprez²

2010

ChemSusChem

352

244

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Ceria has been the subject of thorough investigations, mainly because of its use as an active component of catalytic converters for the treatment of exhaust gases. However, ceria‐based catalysts have also been developed for different applications in organic chemistry. The redox and acid–base properties of ceria, either alone or in the presence of transition metals, are important parameters that allow to activate complex organic molecules and to selectively orient their transformation. Pure ceria is used in several organic reactions, such as the dehydration of alcohols, the alkylation of aromatic compounds, ketone formation, and aldolization, and in redox reactions. Ceria‐supported metal catalysts allow the hydrogenation of many unsaturated compounds. They can also be used for coupling or ring‐opening reactions. Cerium atoms can be added as dopants to catalytic system or impregnated onto zeolites and mesoporous catalyst materials to improve their performances. This Review demonstrates that the exceptional surface (and sometimes bulk) properties of ceria make cerium‐based catalysts very effective for a broad range of organic reactions.

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Ring Opening of Aromatics

Weitkamp

2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction Fundamentals of Hydrodecyclization of Cycloalkanes Hydrogenolysis on Metals Hydrocracking on Bifunctional Catalysts Cracking and Activation of Hydrogen on Monofunctional Acidic Catalysts Ring Opening of Aromatics in Diesel and Jet Fuels Bifunctional Catalysts Metal Catalysts Acid Catalysts Ring Opening of Aromatics in Gasoline Without Degradation of the Carbon Number Ring Opening of Aromatics in Pyrolysis Gasoline Followed by Hydrocracking into a Synthetic Steam‐Cracker Feed Hydrodecyclization and Hydrocracking of Cycloalkanes on Acid Zeolites Direct Ring Opening of Aromatics on Bifunctional Zeolites Conclusions Acknowledgments

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Catalytic ring opening of naphthenic structures

Cited by 21 publications

References 54 publications

Enhancement of naphthalene hydrogenation over PtPd/SiO2–Al2O3 catalyst modified by gold

Enhancement of naphthalene hydrogenation over PtPd/SiO2–Al2O3 catalyst modified by gold

Ceria‐Based Solid Catalysts for Organic Chemistry

Ring Opening of Aromatics

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