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Supporting materials

In the case of metal particles distributed on a support material (e.g. supported catalysts), XPS yields infomiation on the dispersion. A higher metal/support intensity ratio (at the same metal content) indicates a better dispersion [3]. [Pg.1856]

This presentation CD ROM contains a multimedia col lection of visual resources allowing instructors to use art work from the text m multiple formats to create cus tomized classroom presentations visually based tests and quizzes dynamic course website content or attractive printed support materials The Digital Content Manager IS a cross platform CD containing an image library a ta bles library and a PowerPoint presentation... [Pg.1332]

In practice, direct insertion of samples requires a somewhat more elaborate arrangement than might be supposed. The sample must be placed on an electrode before insertion into the plasma flame. However, this sample support material is not an electrode in the usual meaning of the term since no electrical current flows through it. Heating of the electrode is done by the plasma flame. The electrode or probe should have small thermal mass so it heats rapidly, and it must be stable at the high temperatures reached in the plasma flame. For these reasons, the sort of materials used... [Pg.114]

Transmission Fourier Transform Infrared Spectroscopy. The most straightforward method for the acquisition of in spectra of surface layers is standard transmission spectroscopy (35,36). This approach can only be used for samples which are partially in transparent or which can be diluted with an in transparent medium such as KBr and pressed into a transmissive pellet. The extent to which the in spectral region (typically ca 600 4000 cm ) is available for study depends on the in absorption characteristics of the soHd support material. Transmission ftir spectroscopy is most often used to study surface species on metal oxides. These soHds leave reasonably large spectral windows within which the spectral behavior of the surface species can be viewed. [Pg.285]

Addition of Inert Filter Aids. FUtet aids ate rigid, porous, and highly permeable powders added to feed suspensions to extend the appheabUity of surface filtration. Very dilute or very fine and slimy suspensions ate too difficult to filter by cake filtration due to fast pressure build-up and medium blinding addition of filter aids can alleviate such problems. Filter aids can be used in either or both of two modes of operation, ie, to form a precoat which then acts as a filter medium on a coarse support material called a septum, or to be mixed with the feed suspension as body feed to increase the permeabihty of the resulting cake. [Pg.389]

Sodium alumiaate is widely used in the preparation of alumina-based catalysts. Aluminosilicate [1327-36-2] can be prepared by impregnating siHca gel with alumiaa obtained from sodium alumiaate and aluminum sulfate (41,42). Reaction of sodium alumiaate with siHca or siHcates has produced porous crystalline alumiaosiHcates which are useful as adsorbents and catalyst support materials, ie, molecular sieves (qv) (43,44). [Pg.140]

BeryUium is important as a sensor support material in advanced fire-control and navigation systems for military heflcopters and fighter aircraft utilizing the low weight and high stiffness of the material to isolate instmmentation from vibration. It is also used for scanning mirrors in tank fire-control systems. [Pg.69]

An aimual review of the worldwide catalyst industry identifies current technical and business trends within the catalyst industry and fists virtually aU industrial supported (and other) catalysts by manufacturers designations (3). Included are the applications for the catalysts, the composition, ie, active agents and support materials, and some physical properties. [Pg.193]

Composition. Among the most commonly used support materials are aluminas, siUcas, and aluminosihcates with a wide range of alumina to sihca ratios, as well as activated carbon, siUcon carbide, selected clays, various ceramics, artificial and natural 2eohtes, kieselguhr, and pumice. Polymeric... [Pg.193]

The method of preparation of a support material has a tremendous effect on its properties (11). For example, zeoHtes, which are highly stmctured aluminosihcates, are known to be extremely sensitive to the conditions employed both during and after crystallization (12). Also, when siUca—titania is precipitated by a coprecipitation method using ammonia, in which localized hydroxide ion gradients are estabUshed by the precipitation process itself, the product is much more acidic than when it is precipitated using urea, which suppHes hydroxide ion slowly and uniformly during precipitation (13). [Pg.194]

Surface Area. This property is of paramount importance to catalyst performance because in general catalyst activity increases as the surface area of the catalyst increases. However because some reaction rates are strongly dependent on the nature of the stmcture of the catalytic surface, a linear correlation of catalyst activity with surface area should not be expected. As the catalyst surface area increases, for many reactions the selectivity of the catalyst is found to decrease. If the support material is completely inert to the reactants and products, this effect may be diminished somewhat. [Pg.194]

Some catalyst supports rely on a relatively low surface area stmctural member coated with a layer of a higher surface area support material. The automotive catalytic converter monolith support is an example of this technology. In this appHcation, a central core of multichanneled, low surface area, extmded ceramic about 10 cm in diameter is coated with high surface area partially hydrated alumina onto which are deposited small amounts of precious metals as the active catalytic species. [Pg.194]

Porosity and Pore Size. The support porosity is the volume of the support occupied by void space and usually is described in units of cm /g. This value represents the maximum amount of Hquid that may be absorbed into the pore stmcture, which is an especially important consideration for deposition of metal salts or other active materials on the support surface by Hquid impregnation techniques. The concentration of active material to be used in the impregnating solution is deterrnined by the support porosity and the desired level of active material loading on the catalyst. If the porosity is too low, inefficient use of the support material and reactor volume may result. If the porosity is too high, the support body may not contain sufficient soHd material to provide the strength necessary to survive catalyst manufacture and handling. [Pg.194]

The Liquid Phase. The stationary phase in an open tubular column is generally coated or chemically bonded to the wall of the capillary column in the same way the phase is attached to the support of a packed column. These are called nonbonded and bonded phases, respectively. In capillary columns there is no support material or column packing. [Pg.106]

Catalytic Support Body Monolithic Honeycomb Unit. The terms substrate and brick are also used to describe the high geometric surface area material upon which the active coating material is placed. Monolithic honeycomb catalytic support material comes in both ceramic and metallic form. Both are used in automobile catalysts and each possesses unique properties. A common property is a high geometric surface area which is inert and does not react with the catalytic layer. [Pg.486]

Recently, however, we have embarked on a programme aimed at developing biodegradable and renewable support materials based on the very abundant sources of biomass such as starch, chitosan and cellulose, in addition to the inorganic materials mentioned above. [Pg.246]

The practical content of this book is mostly contained in Chapter 5 (gases and liquids) and Chapter 6 (powders and hybrid mixtures) with other chapters providing supporting material. Chapter 2 contains a brief explanation of the nature of static electricity followed by a detailed discussion of the characteristics and effective energies of different static discharges. Since this... [Pg.5]

You must keep a copy of each report. In addition, you must keep the supporting materials used to develop the Information contained in the report. These records must be kept at the facility for a period of three years from the date of the submission and must be readily available for Inspection by EPA. [Pg.21]

Explanations of why a notification was considered necessary and all supporting materials used to develop the notice ... [Pg.95]

Provide support materials to key people. Prepare a briefing document, drawn from the integration proposal and executive summary, that executives, colleagues, and staff can use in responding to internal or external enquiries or in crafting speeches and other presentations. This document is often framed in terms of providing answers to questions that employees or other interested parties may ask. Some sample questions and answers are provided at the end of this chapter. [Pg.17]

In preparing the initial justification for integration, you will need to develop some supporting material this process is illustrated in Exhibit 2-3. [Pg.21]


See other pages where Supporting materials is mentioned: [Pg.360]    [Pg.139]    [Pg.140]    [Pg.419]    [Pg.25]    [Pg.41]    [Pg.117]    [Pg.9]    [Pg.384]    [Pg.43]    [Pg.199]    [Pg.73]    [Pg.173]    [Pg.193]    [Pg.194]    [Pg.194]    [Pg.194]    [Pg.195]    [Pg.196]    [Pg.106]    [Pg.44]    [Pg.33]    [Pg.405]    [Pg.458]    [Pg.946]    [Pg.1549]    [Pg.2137]    [Pg.2150]    [Pg.7]    [Pg.132]   
See also in sourсe #XX -- [ Pg.212 ]

See also in sourсe #XX -- [ Pg.261 , Pg.263 ]




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Advanced Electrocatalyst Support Materials

Affinity chromatography support materials

Carbon as Support Material in Fuel Cell Electrocatalysts

Carbon support materials

Carbon support materials mesoporous

Carbon support materials synthetic

Carbon support materials, for

Carbonaceous support materials

Catalyst Support Materials for Proton Exchange Membrane Fuel Cells

Catalysts and support materials

Cell support materials

Coating support materials

Column support material, particle size

Electrically conducting diamond support materials

Electrocatalyst carbon support materials

Electrodes support materials

Electrophoresis support material

Example of Carbon Monoliths as Catalyst Support Material

Expansion behavior support material

Functional Supports and Materials

Gold Catalysts Supported on Nanostructured Materials Support Effects

Highly support materials

Hybrid supporting materials

Immobilization with Support Materials

Inert support materials

Materials based electrocatalyst support

Materials support material

Materials support requirements

Metal NPs Supported in G-Based Materials as Catalyst for Coupling Reactions

Metal NPs Supported in G-Based Materials as Catalyst for Hydrogen Release

Metal-catalyzed hydrogenations supported materials

Metallic Catalysts Supported on Amorphous Materials

Nature of the Support Material

Noncarbon support materials

Novel Carbon Materials as Electrocatalyst Support for Fuel Cells

Novel Carbon Materials as Supports for Fuel Cell Electrocatalysts

Organocatalysts mesoporous material-supported

Other Support Materials

Oxidic support materials

Polymer and Mesoporous Material Supported Organocatalysts

Polymer support materials

Polymer-supported catalysts, example catalytic material

Porous Inorganic Materials as Potential Supports for Ionic Liquids

Porous support material

Propane supported metal catalyst material

Proton exchange membrane fuel cells support materials

Requirements for Carbon Materials as Catalyst Supports in Industrial Applications

Resins support materials

Selection of Support Material

Solid support materials

Solid supported materials

Soluble polymer-supported materials

Support grafted carbon materials

Support material

Support material

Support materials and solvents

Support materials other than polystyrene

Support materials, for fuel cells

Support nitrogen-doped carbon materials

Support particulate materials

Supported Materials

Supported Metal Catalyst Materials

Supported on Carrier Materials

Supported support material

Supporting materials applications

Supporting materials definitions

Supporting membrane material

Supports mesoporous materials

Synthetic Methodologies for Supported Ionic Liquid Materials

Synthetic support materials

Technical prospects, of supported ionic liquid materials

UV supportive raw materials for food packaging applications

Water support material

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