Reactions of Tetralin with Tritiated Molecular Hydrogen on Pt/Al2O3, Pd/Al2O3, and Pt−Pd/Al2O3Catalysts

Qian, Weihua; Shirai, Hisakazu; Ifuku, Masahiro; Ishihara, Atsushi; Kabe, Toshiaki

doi:10.1021/ef0000882

Cited by 16 publications

(15 citation statements)

References 27 publications

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“…Zoning and layering different Pt‐Pd ratio catalysts may have implications on the sulphur poisoning and deactivation of these catalysts. Bimetallic Pt‐Pd catalysts are more sulphur resistant than both Pt and Pd monometallic catalysts . This increased sulphur resistance for bimetallic catalysts has been related to a decrease of electron density on Pt induced by bimetallic interactions, and these interactions may depend on the precursors and pretreatments used in catalyst preparation .…”

Section: Layered and Zoned Diesel Oxidation Catalyst (Doc)mentioning

confidence: 99%

“…This increased sulphur resistance for bimetallic catalysts has been related to a decrease of electron density on Pt induced by bimetallic interactions, and these interactions may depend on the precursors and pretreatments used in catalyst preparation . For hydrogenation/dehydrogenation reactions, the sulphur tolerance of Pd was higher than that of Pt; whereas, the opposite has been found for oxidation reactions . In both cases, however, bimetallic Pt‐Pd catalysts have generally shown improved sulphur tolerance, depending on the Pt:Pd ratio.…”

Section: Layered and Zoned Diesel Oxidation Catalyst (Doc)mentioning

confidence: 99%

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Heterogeneous catalyst design: Zoned and layered catalysts in diesel vehicle aftertreatment monolith reactors

Hazlett

Epling

2018

Can J Chem Eng

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There have been ongoing research efforts focused on layering or zoning different washcoats/active metals on the catalysts constituting diesel aftertreatment systems: the diesel oxidation catalyst (DOC), the selective catalytic reduction (SCR) catalyst, the lean NOX trap (LNT), the ammonia slip catalyst (ASC), and the diesel particulate filter (DPF). This review paper aims to shed insight into the state‐of‐the‐art research on catalyst design in this area and how these catalyst designs may evolve to tackle engine emission reductions in the future. First, we discuss the motivation for zoning or layering catalysts and pioneering work on three‐way catalyst (TWC) design for reducing gasoline engine emissions; then, we focus on the catalytic systems used for diesel exhaust aftertreatment. The configuration of the aftertreatment systems for diesel engines generally consist of an oxidation catalyst for hydrocarbon (HC), CO, and NO oxidation (over the DOC), a NOX reduction catalyst (over one or combined SCR/LNT/ASC catalysts), and a particulate matter (PM) filter (using a DPF). The research to date consistently demonstrates that zoning and layering catalyst regions leads to improved performance and/or smaller system volumes required.

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Section: Layered and Zoned Diesel Oxidation Catalyst (Doc)mentioning

confidence: 99%

Section: Layered and Zoned Diesel Oxidation Catalyst (Doc)mentioning

confidence: 99%

Heterogeneous catalyst design: Zoned and layered catalysts in diesel vehicle aftertreatment monolith reactors

Hazlett

Epling

2018

Can J Chem Eng

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“…It has been reported in the literature that the aromatic compounds present in LCO are mostly the diaromatics (naphthalenes) compounds [5]. The hydrogenation of these diaromatics in fuels into monoaromatics is easy, but their complete saturation is more difficult due to reversibility of hydrogenation reaction [5,6]; hence in the hydrogenation and SRO studies, tetralin and naphthalene have been often considered as model molecules representative of diesel fuels [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Hydrogenation of Tetralin over Supported Ni and Ir Catalysts

Upare

Song

Lee

2013

Journal of Nanomaterials

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Selective hydrogenation and ring opening (SRO) of tetrahydronaphthalene (tetralin) was studied over nickel and iridium supported catalysts in the context of the removal of polynuclear aromatics from diesel fuel. The tetralin hydrogenation was carried out in a fixed-bed reactor at 270°C, using H2pressure of 30 bars, WHSV of 2.3 h−1, and H2/feed molar ratio of 40; the resultant products were analyzed by GC and GC-MS. The Ir/SiO2catalyst gave 85% of tetralin conversion and 75.1% of decalin products selectivity whereas Ni/SiO2catalyst showed an unprecedented high catalytic performance with 88.3% of tetralin conversion and 93% of decalin products selectivity. The catalysts were characterized by using different characterization techniques such as XRD, TPR, and HR-TEM to know the physicochemical properties as well as active sites in the catalysts.

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“…A hydrogen storage system with cyclic saturated hydrocarbons is OPEN ACCESS more stable and inexpensive than systems with inorganic hydrogen-adsorbing alloys. Hydrogenation of aromatic compounds is important for the production of high performance diesel fuel (low aromatic diesel fuels) [5][6][7][8]. Polycyclic aromatic compounds (PAHs) are components of coal tar, creosote and crude oil, and are formed by incomplete combustion of organic materials.…”

Section: Introductionmentioning

confidence: 99%

Hydrogenation of Anthracene in Supercritical Carbon Dioxide Solvent Using Ni Supported on Hβ-Zeolite Catalyst

2012

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Catalytic hydrogenation of anthracene was studied over Ni supported on Hβ-zeolite catalyst under supercritical carbon dioxide (sc-CO2) solvent. Hydrogenation of anthracene in sc-CO2 yielded 100% conversion at 100 °C, which is attributed to the reduced mass transfer limitations, and increased solubility of H2 and substrate in the reaction medium. The total pressure of 7 MPa was found to be optimum for high selectivity of octahydroanthracene (OHA). The conversion and selectivity for OHA increased with an increase in H2 partial pressure, which is attributed to higher concentration of hydrogen atoms at higher H2 pressures. The selectivity reduced the pressure below 7 MPa because of enhanced desorption of the tetrahydro-molecules and intermediates from Ni active sites, due to higher solubility of the surface species in sc-CO2. The selectivity of OHA increased with the increase in catalyst weight and reaction time. The rate of hydrogenation of anthracene was compared with that found for napthalene and phenanthrene. The use of acetonitrile as co-solvent or expanded liquid with CO2 decreased the catalytic activity

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Reactions of Tetralin with Tritiated Molecular Hydrogen on Pt/Al₂O₃, Pd/Al₂O₃, and Pt−Pd/Al₂O₃Catalysts

Cited by 16 publications

References 27 publications

Heterogeneous catalyst design: Zoned and layered catalysts in diesel vehicle aftertreatment monolith reactors

Heterogeneous catalyst design: Zoned and layered catalysts in diesel vehicle aftertreatment monolith reactors

Hydrogenation of Tetralin over Supported Ni and Ir Catalysts

Hydrogenation of Anthracene in Supercritical Carbon Dioxide Solvent Using Ni Supported on Hβ-Zeolite Catalyst

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