Noble metal loaded zeolites as catalysts for alkane hydroconversion

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  • English
UMIST , Manchester
StatementF. Bachelin ; supervised by V. Zholobenko.
ContributionsZholobenko, V., Chemistry.
ID Numbers
Open LibraryOL19176923M

All the HZSM-5 zeolites were loaded with wt% Pd by incipient wetness impregnation with an aqueous Pd (NH 3) 4 (NO 3) 2 solution. The resulting catalysts were calcined at K under flowing air for 4 h. The impregnated powders were sieved to Author: Lingqian Meng, Gina Vanbutsele, Robert Pestman, Andreas Godin, Douglas E.

Romero, Arno J.F. van Hoof. It is generally accepted, for a metal-loaded zeolite catalyst, that hydroisomerization occurs via a carbenium-ion mechanism with protonated cyclopropane intermediates.

A rapid hydrogenation/dehydrogenation equilibrium is established between the alkane feed/product molecules and the corresponding highly reactive alkene by:   The acid strength of a commercial Y zeolite subjected to Atomic Layer Deposition (ALD) of alumina using alternating pulses of trimethylaluminium (TMA) and water was assessed by means of Single-Event MicroKinetic modelling of n-decane tic activity changes were rationalized in terms of changes in three catalyst descriptors: the physisorption Cited by:   A Single-Event MicroKinetic assessment of n-alkane hydroconversion on ultrastable Y zeolites after Atomic Layer Deposition of alumina.

Journal of Catalysis, DOI: /ted by: Request PDF | n-Pentane Hydroconversion Using Pt-loaded Zeolite Catalysts | Pt/H-ZSM-5 and Pt/H-MOR catalysts with different Pt contents were prepared via impregnation using H2PtCl6. There are four distinct noble metal-loaded catalysts available commercially to increase the octane number of the combined pentane and hexane fraction: (1) chlorided alumina, (2) MOR-type zeolites, (3) sulfated,, and (4) tungstentated, zirconia.

Because of its reasonable cost, satisfactory catalytic performance and availability, nickel could be used in zeolite catalysts as an alternative to expensive noble metals. Nickel-zeolite catalysts.

Bifunctional molecular sieve catalysts such as zeolite and SAPO materials loaded with platinum or palladium are known to be very effective in selective isomerization of n- alkanes. Vuori et al. [42, 43] synthesized high-performance Ir-loaded beta zeolite catalysts through ALD of the metal.

As could be expected from the kinetic diameter of the precursor, Ir exclusively. It was found that the highest yield of liquid hydrocarbons was on the zeolite catalysts modified by 3% and 5% ZnS, and is % and %, respectively, which is 9% more than in the initial H-ZKE-AF.

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The activity of the zeolite catalysts modified by zinc oxide and zinc sulfide was in correlation with their acid properties. Full article. The supported noble metal catalyst, catalysts for long-chain n-alkanes.

Besides the above mentioned zeolites, catalysts based on Pt or Pd loaded silicoaluminophosphates SAPO. In this work, some commercial nanoporous-based catalysts, such as USY, beta and mordenite zeolites loaded with Platinum metal acting as bifunctional catalysts, were used for hydroisomerisation.

Hydroconversion of n-C10 alkanes using functionalized AlMCM as catalysts. Reaction Kinetics, Mechanisms and CatalysisDOI: /s Li Tan, Xiaoyu Guo, Xinhua Gao, Noritatsu Tsubaki. Designing a Mesoporous Zeolite Catalyst for Products Optimizing in n-Decane Hydrocraking.

n-Alkane hydrocracking has been previously performed in a perfectly mixed flow reactor at temperatures from to K, pressures from to 10 MPa, and molar hydrogen-to-hydrocarbon inlet ratios from 50 to on a USY zeolite loaded with wt % Pt1. For a given ratio of metal to acid sites, four important causes affecting the ideal character (i.e., the quasi.

The reaction pathways and kinetics of n-hexadecane hydroisomerization and hydrocracking were determined in the presence of each of three platinum-containing dual-function catalysts: (a) Pt on a proprietary zeolite (Pt/Ζ), (b) Pt on silica−alumina (Pt/Si−Al), and (c) Pt on MCM (Pt/MCM).

The reaction networks were used to interpret differences in isomerization selectivity. There are four distinct noble metal-loaded catalysts available commercially to increase the octane number of the combined pentane and hexane fraction: (1) chlorided alumina [5], (2) MOR-type zeolites [6,7], (3) sulfated [8–13], and (4) tungstentated [14–17] zirconia.

@article{osti_, title = {Preparation of metal/zeolite catalysts: Formation of palladium aquocomplexes in the precursor of palladium-mordenite catalysts}, author = {}, abstractNote = {Previous research has revealed that the catalytic performance of metal/zeolite catalysts can be significantly modified by exposing the catalyst precursor to H[sub 2]O vapor during the period.

Purchase Successful Design of Catalysts, Volume 44 - 1st Edition. Print Book & E-Book. ISBNcatalyst in the hydroconversion of C 6 to C 9 n-alkanes was investigated in the temperature range – C at 1 atm pressure.

Activity and selectivity were found to show strong dependence on the choice of n-alkane with reaction rates found to be higher for the shorter alkanes.

n-Hexane and n-heptanewerehydroisomerised tothe corresponding C6 and. Phenol was the major intermediate on all catalysts.

Description Noble metal loaded zeolites as catalysts for alkane hydroconversion EPUB

Over the noble metal catalysts saturation of the aromatic ring was the major pathway observed at low temperature ( °C), forming predominantly cyclohexanone and cyclohexanol.

Substantial ring opening reaction was observed on Pt/C and Ru/C at higher reaction temperatures (e.g., °C). The present invention relates to a method for the recycling of plastics materials, in particular waste plastics materials, into chemical feed stocks and hydrocarbon fractions.

The present invention also relates to novel zeolite based catalysts used in such methods. The present invention also relates to methods of manufacturing such zeolite based catalysts. medium-to-large-pore acid zeolites loaded with noble metals, like Pt-H-MOR, for conversion. The output of this reactor is then fed back to the separation process.

Another way of increasing the octane number of the gasoline is to selectively crack the linear alkanes to light gaseous alkanes. Catalysts based on medium. by a noble metal [3–6]. The aim of this work was to study the effect of dealumination by two different methods using H.

EDTA on the physicochemical characteristics of Y zeolite. Hydroisomerization of a C. 6 –C. n-alkane was tested on dealuminated catalysts in comparison with the parent H-Y zeolite. The dealuminated zeolite Y-supported. The catalytic activity of the Pt-loaded silica gel in the decane hydroconversion was verified and found to be negligible in the temperature range of interest.

Catalyst pellets were obtained as described above. All catalytic tests occurred in the same reactor setup with hydrogen to hydrocarbon molar ratio of 1) 2) Journal of the Japan Petroleum Institute, 52, (6), () [Regular Paper] Hydroconversion of Dimethylpentanes from Methylcyclohexan.

e Using Two Consecutive Reac. The present invention provides a catalyst containing a noble metal and a zeolite having a specific alkali metal content of the intermediate pore size so that the light catalytic dehydrogenation of paraffins, said catalyst is a sulfur-resistant, and therefore, the dehydrogenation process in the presence of sulfur can be or at periodically exposed to sulfur.

A sulfur resistant catalyst is taught having noble metal nano-particles contained in a zeolite cage having a final pore size of between about Å and about Å. The zeolite cage is either directly synthesized, or the final pore size of the zeolite cage is reduced by post-treatments selected from chemical vapour deposition, chemical liquid deposition, cation exchange and.

n-Alkane hydroconversion. Catalysts were studied in the n-alkane conversion over a period of 6 this period, the catalyst showed good stability independent of the n-alkane employed as feed over the 6 h period with no signs of significant deactivation or changes in selectivity example of this behavior is illustrated by the use of n-heptane.

The use of zeolite catalysts for the refining of products from methanol synthesis and Fisher–Tropsch synthesis was reviewed.

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The focus was on fuels refining processes and differences in the application to indirect liquefaction products was compared to petroleum, which is often a case of managing different molecules.

Processes covered were skeletal. The effects of noble metal catalysts on the bio-oil quality during the hydrodeoxygenative upgrading process. Fuel– (). Park S. H., Cho H. Y., Ryu C. & Park Y. Removal of copper(II) in aqueous solution using pyrolytic biochars derived from red macroalga Porphyra tenera.

The invention relates to a modified zeolite catalyst, useful for the conversion of paraffins, olefins and aromatics in a mixed feedstock such as FCC gasoline that contain high content of olefin, aromatic and n-paraffin into isoparaffins.

The invention further relates to the use of such a catalyst, for example but not limited to, in a process for the conversion of paraffins, olefins and.Hydrodeoxygenation (HDO) of guaiacol to cyclohexane, important for bio-oil upgrading, is usually performed at high reaction temperature (≥ °C).

In this work, low temperature transformation of guaiacol to cyclohexane was achieved at °C over non-noble metal Ni/SiO2 and various zeolites.

Among zeolites tested .catalytic cracking accounting for the effect of these catalyst properties on activity and selectivity. isomerization and hydrocracking on noble-metal-loaded faujasites 1. Rate parameters for hydroisomerization.

Ind. Eng. Chem. Res.28 alkane hydroconversion on Pt/H-(US)Y-zeolite. J. Catal.,