rhenium platinum reforming

  • Home
  • rhenium platinum reforming

The Oxidation State of Rhenium and Its Role in Platinum ...

A bimetallic platinum-rhenium reforming catalyst was first introduced (2, 3) by Chevron in February 1967, but several such catalysts are now available. Rhenium activated catalysts have many advantages over conventional …

Read More...

Platinum–Rhenium Synergy on Reducible Oxide Supports …

Platinum–Rhenium Synergy on Reducible Oxide Supports in Aqueous-Phase Glycerol Reforming Dr. Aysegul Ciftci, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 Eindhoven (The Netherlands), Fax: (+31) 40-2455054

Read More...

Naphtha reforming process - Chevron Research Company

In a process for reforming light naphtha with a bimetallic or multimetallic reforming catalyst, such as a platinum-rhenium-halogen catalyst, at conventional reforming conditions, wherein the catalyst is used for an extended continuous on-stream period, the aromatics selectivity of the catalyst is rapidly increased by contacting the naphtha and hydrogen with the catalyst at increased …

Read More...

Mineral Commodity Summaries 2022 - Rhenium

platinum-rhenium catalysts were used in petroleum reforming for the production of high-octane hydrocarbons, which are used in the production of lead-free gasoline. Rhenium improves the high-temperature (>1,000 degrees Celsius) strength properties of some nickel-base superalloys. Rhenium alloys were used in crucibles, electrical contacts,

Read More...

-Separation of Pt ...

Separation of Pt and Re from spent reforming catalysts by pressure leaching : DOI: : : non-ferrous metallurgy spent catalyst …

Read More...

The Oxidation State of Rhenium and Its Role in Platinum ...

the conventional platinum-alumina reforming catalysts. The most significant advance has turned out to be the discovery of a new family of catalysts in which a second metal, usually rhenium, is added to the platinum (I). A bimetallic platinum-rhenium reforming cata- lyst was first introduced (2, 3) by Chevron in

Read More...

Production of rhenium-containing reforming catalysts ...

A rhenium-containing catalyst, particularly one comprising platinum and rhenium, composited with a porous inorganic support material, especially alumina, is found to be more selective in hydrocarbon conversion reactions, particularly reforming (hydroforming) when pretreated in a sequence which includes the steps of oxidation, dry hydrogen reduction, and sulfiding.

Read More...

Characterization of metal segregation in Pt–Re/Al 2O 3 ...

Mono- and bimetallic platinum–rhenium reforming catalysts with the content of each metal of 0.3wt.% were studied by H2 and O2 adsorption, TPR and X-ray absorption techniques.

Read More...

US Patent for Catalytic reforming with rhenium-platinum ...

A new reforming process employs a new rhenium-platinum catalytic composite having a rhenium to platinum weight ratio in the range of not less than 2 to about 5, whereby longer relative cycle length is obtained when reforming a naphtha having less than about 0.5 ppm by weight of sulfur than if the rhenium-platinum ratio is outside of such range.

Read More...

Reforming with platinum-rhenium-selenium catalysts …

Reforming with platinum-rhenium-selenium catalysts,Reforming with platinum-rhenium-selenium catalysts·,,·,,,

Read More...

Catalytic Reforming | FSC 432: Petroleum Refining

Most reforming catalysts contain platinum as the active metal supported on alumina, and some may contain additional metals such as rhenium and tin in bi- or tri-metallic catalyst formulations. In most cases, the naphtha feedstock needs to …

Read More...

MODULE -5 Catalytic Reforming

This is a fixed bed regenerative reforming process. Rhenium-platinum . combination are used as catalyst which are quite good in resisting fouling. This can be operated at press below 20 atm. Q12: What is Power forming? A12: Power forming process is …

Read More...

Catalytic reforming - WikiMili, The Best Wikipedia Reader

The commonly used catalytic reforming catalysts contain noble metals such as platinum and/or rhenium, which are very susceptible to poisoning by sulfur and nitrogen compounds. Therefore, the naphtha feedstock to a catalytic reformer is always pre-processed in a hydrodesulfurization unit which removes both the sulfur and the nitrogen compounds.

Read More...

Fouling of a platinum-rhenium reforming catalyst using ...

It is well known that rhenium stabilizes a commercial platinum reforming catalyst; however, the exact role of Re is still in doubt. The function of Re was investigated by determining and then comparing the fouling characteristics of two model reforming reactions catalyzed by bifunctional Pt and Pt Re catalysts.

Read More...

REFORMING SOLUTIONS FOR IMPROVED PROFITS IN …

CCR reforming catalysts still contain platinum, which is required to catalyze important reforming reactions. The level of platinum required on the catalyst has been considerably reduced over time as feedstock contaminant levels and regeneration quality have improved. Rhenium is not used since CCR reforming catalysts do not need to be as stable as

Read More...

Catalytic Reforming of n-Heptane on Platimum - …

properties of platinum when alloyed with second metal[21,23].A number of bimettalic reforming catalysts have been patented and Pt-Re catalysts are used commercially.With Pt-Re catalysts it seems probable that the rhenium is zero-valant state and forms an alloy,or at least a solid solution,with platinum.The role of other

Read More...

Rhenium - USGS

platinum-rhenium catalysts were used in petroleum reforming for the production of high-octane hydrocarbons, which are used in the production of lead-free gasoline. Rhenium improves the high-temperature (>1,000 °C) strength properties of some nickel-base superalloys. Rhenium alloys were used in crucibles, electrical contacts,

Read More...

Rhenium - Avon Metals

In its Ammonium Perrhenate (APR) form (white free flowing crystals), Rhenium is used in Platinum-Rhenium reforming catalysts. Avon Metals subsidary, Avon Specialty Metals Ltd, is the exclusive European agent for Thompson Creek Metals – a major primary producer of Rhenium and APR. Avon markets the following Rhenium products :-

Read More...

PtRh5 Platinum-Rhenium Petroleum reforming Catalyst, …

Description:Petroleum is an important part of modern energy, petroleum reforming catalysis is one of the effective ways to use petroleum efficiently, platinum-rhenium series catalyst is a bimetallic catalyst, its remarkable characteristic is high stability, used in semi-regeneration or reforming unit.High octane gasoline can be produced or produce aromatic hydrocarbons such as efficient ...

Read More...

Reforming catalyst – Hydrogenation catalyst

LSCRUC-I is a kind of semi-continuous regeneration platinum-rhenium reforming catalyst developed by our company. Based on the high purity, micro-pores concentration, large surface area and high intensity ã- Al 2 O 3 carrier, this catalyst is …

Read More...

Rhenium as a Catalyst: A Future of Maximised Efficiency ...

Catalysts used in reforming processes mainly have platinum as the active catalyst. When combining platinum with other metals, such as rhenium, to form bimetallic or multi-metallic catalysts, significant enhancements in catalyst effectiveness have been observed. Today, rhenium is arguably one of the most valuable elements in heterogeneous catalysts.

Read More...

Role of rhenium in Pt‐Re‐Al 2 O 3 reforming catalysis—An ...

The inclusion of Re in Pt‐Re‐Al2O3 reforming catalysts to improve the lifetime is known, but how rhenium functions and how it is disposed in the catalyst remain unclear. These fundamental questions have been attempted in this study by the use of proton‐induced X‐ray emission and Rutherford backscattering spectrometry (together with electron microscopy and …

Read More...

Rhenium - an overview | ScienceDirect Topics

Catalytic reforming: a platinum or platinum– rhenium catalyst is used to promote the conversion of distillates in the 100- to 150-molecular weight range (light naphtha) into heavier aromatics for use in gasoline blending and petrochemicals. Hydrogen is a by-product of this reaction and is commonly used for hydrocracking.

Read More...

CATALYTIC REFORMING OF NAPHTHA TO GASOLINE BY …

• there is an optimum rhenium/platinum ratio for maximum selectivity • higher rhenium leads to lower coke make • higher rhenium leads to higher btx yields at the expense of c9+ aromatics • higher rhenium leads to higher gas make, lower hydrogen and lower c5+ yield

Read More...

(PDF) Role of rhenium in Pt-Re-Al2O3 reforming catalysis ...

Platinum-rhenium-alumina catalysts con- and correlate the activity of Pt-Re-AlzO3 catalysts in catalytic tain an amount of rhenium comparable to the amount of reforming of methylcyclohexane (MCH) in an interdisciplin- platinum present (about 0.3 wt. % of each).

Read More...

Platinum–Rhenium Synergy on Reducible Oxide Supports …

Platinum–Rhenium Synergy on Reducible Oxide Supports in Aqueous-Phase Glycerol Reforming. Dr. Aysegul Ciftci, Dr. Aysegul Ciftci. Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 Eindhoven (The Netherlands), Fax: …

Read More...