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catalyst preparation

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Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001317
EISBN: 978-1-62708-170-2
... preparation procedures, namely, impregnation, ion exchange, and precipitation. Catalyst carriers are usually high-surface-area inorganic materials with complex pore structures, into which catalytic materials such as palladium, platinum, cobalt, chromium oxide, and vanadium pentoxide are deposited using...
Book Chapter

Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006685
EISBN: 978-1-62708-213-6
... , titanium dioxide (TiO 2 ), and zirconium dioxide (ZrO 2 ) have been characterized using Raman spectroscopy ( Ref 54 ). These catalysts are of industrial importance for the oxidation Of SO 2 , CO, and other hydrocarbons. In this study, the effects of catalyst preparation and catalyst surface coverage...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001736
EISBN: 978-1-62708-178-8
... analysis of these materials. Metal oxides exhibit strong absorption in the infrared region, making analysis of bulk metal oxides virtually impossible. Therefore, alkali halide pellets, for example, KBr, of the metal oxides usually must be prepared. One possible consequence of this type of preparation...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001265
EISBN: 978-1-62708-170-2
...-on-Plastic Cleaning (Optional) Catalyst Promotion (Conditioning) Microetching Catalyst Predip Catalyzation (Sensitization) Acceleration (Activation) Gross Surface Preparation Immediate Preparation for Plating Printed Wiring Boards Decorative Plating-on-Plastic Molded...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006009
EISBN: 978-1-62708-172-6
... preparation to assure good penetration and adhesion. These linings include several systems varying in thickness, type of fillers and reinforcement, and application method. For each lining system, various polyester and vinyl ester resin bases are used to achieve the desired chemical resistance...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001243
EISBN: 978-1-62708-170-2
...) Conventional sulfate bath (a) 25 1 1:05 0:40 0:25 50 2 2:05 1:20 0:55 125 5 5:20 3:20 2:20 Mixed catalyst bath (b) 25 1 0:50 0:30 0:20 50 2 1:40 1:00 0:40 125 5 4:05 2:25 1:45 Fluoride-free bath (c) 25 1 0:40 0:27 0:17 50 2 1:25 0:53 0:37...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005354
EISBN: 978-1-62708-187-0
... with all the common types of equipment; however, batch mixing is not normally recommended for sand formulations having short working times. Since the hardening process begins as soon as the binder is added to the catalyst-coated sand and is continuous and irreversible, it is important that prepared sand...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005983
EISBN: 978-1-62708-166-5
...Abstract Abstract This article describes the effects of furnace atmospheric elements on steels. These elements are air, water vapor, molecular nitrogen, carbon dioxide, and carbon monoxide. The article provides useful information on six groups of commercially important prepared atmospheres...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006046
EISBN: 978-1-62708-172-6
... operating metal-finishing lines, this is usually not a problem. For marine and industrial coatings, surface preparation is often acid pickling or blast cleaning to a high level of cleanliness. Novolac resins are prepared with an acid catalyst and substantially less than 1 mole of formaldehyde per mole...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... Heat-cured resin binder processes Shell process (Croning process) Furan hot box Phenolic hot box Warm box (furfuryl/catalyst) Oven bake (core oil) Cold box resin binder processes Phenolic urethane Furan/SO 2 Free radical cure (acrylic/epoxy) Phenolic ester No-bake...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003366
EISBN: 978-1-62708-195-5
... ratio of less than 0.9 to 1 are called novolacs, and those prepared from an alkaline catalyst and an F/P molar ratio of greater than 0.9:1 are known as resoles. Oxalic and sulfuric acids are used to synthesize novolacs. Aliphatic amines or hydroxides of ammonium, sodium, lithium, potassium, barium...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006135
EISBN: 978-1-62708-175-7
...Abstract Abstract Sintering atmosphere protects metal parts from the effects of contact with air and provides sufficient conduction and convection for uniform heat transfer to ensure even heating or cooling within various furnace sections, such as preparation, sintering, initial cooling...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005926
EISBN: 978-1-62708-166-5
... constituent in many prepared atmospheres. The chemical makeup of air is approximately 79% nitrogen and 21% oxygen, with trace amounts of carbon dioxide. As an atmosphere, air behaves like an oxygen atmosphere because oxygen is the most reactive constituent in air. Oxygen Oxygen reacts with most metals...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005242
EISBN: 978-1-62708-187-0
... methods are prepared quite differently. Chemically bonded media are prepared by coating grains of sand with a binder that is later cured by some type of chemical reaction. In the case of green sand molding, the sand is coated with a clay-water mixture that forms an adhesive bond between the sand grains...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005244
EISBN: 978-1-62708-187-0
... for discussion. As the name implies, the term hot box refers to binders that are cured by heating the core box. Conversely, the term cold box refers to sand binders that cure in the core box when a vapor catalyst is passed through the core box ( Fig. 2 ). Vapor curing (cold box) methods can be used...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003036
EISBN: 978-1-62708-200-6
... prepregs. The original concept was to prepare groups of plies in the flat and manually place them on the mold. However, the shape of the individual plies was limited by the capability of the cutters in the tape head. Therefore, recognizing a potential new market, the machine tool industry became involved...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003035
EISBN: 978-1-62708-200-6
... physical and mechanical properties, including catalyst, fillers, thickeners, pigments, thermoplastic polymers, flame retardants, and ultraviolet absorbers. It talks about the mixing techniques available for SMC resin pastes, including batch, batch/continuous, and continuous mixing. The article also...
Book Chapter

By Mark C. Williams
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003602
EISBN: 978-1-62708-182-5
... Seminar Program and Abstracts , 29 Nov–2 Dec 1992 ( Tucson, AZ ) 26. Kackley N.D. , McCatty S.A. , and Kosek J.A. , “Improved Anode Catalysts for Coal Gas-Fueled Phosphoric Acid Fuel Cells,” Final Report DOE/MC/25170-2861, prepared for U.S. Department of Energy, Contract DE-AC21...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006395
EISBN: 978-1-62708-192-4
...) (a) Load of 100 g. Adapted from Ref 7 Hard-chrome-plating systems Table 1 Hard-chrome-plating systems Characteristic Sulfate catalyst Mixed fluoride sulfate Nonfluoride CrO 3 :SO 4 2− 100:1 200:1 90:1 Cathode efficiency, % 7–15 20–25 23–26 Vickers hardness 800–1000...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006533
EISBN: 978-1-62708-207-5
... bonded sands that are self-hardening are usually prepared in a continuous mixer, which consists of a trough or tube containing a mixing screw. Dry sand is metered into the trough at one end through an adjustable sand gate. Metering pumps introduce liquid catalyst and binder through nozzles...