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2 edition of Structural studies of supported nickel catalysts for fat hardening. found in the catalog.

Structural studies of supported nickel catalysts for fat hardening.

Chun-Shun Chung


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Structural studies of supported nickel catalysts for fat hardening by Chun-Shun Chung Download PDF EPUB FB2

Structural studies of supported nickel catalysts for fat Hardening. Author: Chung, C. Süd-Chemie AG, München 2, Germany—Süd-Chemie offers a range of nickel catalysts for fat and fatty-acid hydrogenation under the titles of Girdler and KE Catalysts. Catalyst—G This is a 25% of nickel dry, reduced catalyst supported on 13% of kieselguhr and clothed in approximately 63% of saturated fat as pastilles.

Effect of Thermal Treatment on the Nickel State and CO Hydrogenation Activity of Titania-Supported Nickel Catalysts. Journal of Catalysis(1), DOI: /jcat D.R Rainer, D.W Goodman. Metal clusters on ultrathin oxide films: model catalysts for surface science by: The nickel based catalysts were investigated in the partial oxidation of natural gas to the feedstock CO/H 2, showing a fairly good performance [12].The promoted catalysts were prepared by a wet impregnation method, with the addition of rare earth oxide like Y 2 O 3, CeO 2, catalytic performances were compared for the ceria promoted nickel catalysts.

Supported nickel catalysts have been prepared by coating mesoporous silica with nickel oxide through a sol-gel coating technology, other than the conventional impregnation procedure.

Sol-gel nickel oxide coatings were first synthesized using nickel nitrate and lactic acid as precursors and then, deposited on the support of mesoporous silica SBACited by: 2.

An increase of the reduction temperature of a Ni/CeO2 solid results in a continuous decrease of the catalytic activity toward C2H6 hydrogenolysis and of the quantity of adsorbed H2. O2 treatments with subsequent reduction at low temperature restore a part of the initial properties.

This behavior, typical of a strong metal support interaction, is similar to that of Ni/TiO2, Ni/SiO2 and Ni/ZrO2. The disadvantage of nickel-supported catalysts is their short life caused by a strong deactivation of the active centers due to coke deposition, oxidation and sintering of the metallic active phase.

One possible solution to this problem is the use of a suitable metallic or structural. Supported nickel catalyst was prepared by the wet-impregnation method, using nitrate salt as the precursor.

A weighted amount of nickel nitrate was placed in a ml beaker and a small amount of distilled water was added. After 20 min, the appropriate weight of MgAl 2 O 4, MgO/Al 2 O 3 or γ-Al 2 O 3 was added under continuous stirring.

highest leaching efficiency of nickel from both the catalysts are found to be: M HCl solution, tem-perature 60 oC, solid to liquid ratio of 1/10, particle size mm. In these conditions 99% of nickel is extracted from KUB-3 catalyst after 3 hours of leaching, and 98% of nickel from RANG after 4 hours of leaching, respectively.

Nickel is an important catalyst that has attracted particular interest from organic chemists since the s, both for cross-coupling and for a range of reactions of alkenes and alkynes.

Low Pressure RAIRS Studies of Model Catalytic Systems. The Journal of Physical Chemistry C(15), DOI: /jpt. Emma L. Wilson and Wendy A. Brown. Low Pressure RAIRS Studies of Model Catalytic Systems.

Copper, palladium and ruthenium supported catalysts have normally been used (Dasari et al., ), but other metals like iron, nickel and rhodium can be used as well.

The concomitant use of an acidic catalyst, such as sulfonic acid resins, improves the selectivity of the catalyst toward hydrogenolysis, allowing working at lower temperatures and.

JOURNAL OF CATALY () Activity and Properties of Nickel Catalysts in the Hydrogenolysis of Propane F. SHEPHARD From the Gas Council Basic Research Group, London Research Station, Michael Road, Fulham, London, S.

6 Received May a, ; revised November 5, A series of nickel-alumina catalysts was made by heating samples of a coprecipitated catalyst.

Structures of Ni catalysts supported on filamentous carbon (CFC) produced by methane decomposition over coprecipitated Ni and Ni-Cu/alumina catalysts were studied by EXAFS and TEM. Thermal pre-treatment in N2 at °C of samples impregnated by nickel nitrate precursor was found to produce either NiO or nickel carbide, Ni3C, phase.

This was explained by different reducing properties of the. Study the catalytic and surface characteristics of Nickel based catalyst supported with metal oxide for H/D isotopic exchange Article (PDF Available) July with 56 Reads How we measure 'reads'.

Nickel-based catalysts, supported on diatomite, silica gel and perlite, with high nickel loadings, have been prepared by precipitation-deposition method. Various nickel precursor salts were used for the preparation of catalyst precursors.

In the precursor state, the catalysts were characterized using nitrogen physisorption, mercury porosimetry, infrared, and X-ray diffraction spectroscopy. Erkelens, S. Eggink‐Du Burck, Infrared study of hydroxyl groups on nickel oxide and silica‐supported nickel catalysts, Recueil des Travaux Chimiques des Pays-Bas, /recl, 92, 6, (), ().

The commercial catalyst with the small-est nickel crystallite size, in the samples studied, was not the most active for hardening soybean oil, while fatty acid hydrogenation showed a large crystallite catalyst to have the highest activity. Studies have been made of the kinetics of carbon deposition on supported nickel catalysts used for steam reforming.

Comparison with results obtained with nickel foils show that the support has. A Supported Nickel Catalyst Stabilized by a Surface Digging Effect for Efficient Methane Oxidation Dr.

Huang Zhou Department of Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, China.

Nickel catalysts, supported on alumina, silica, and molybdena, have been prepared by impregnation and co-crystallization.

In the precursor state the catalysts were characterised by UV–visible spectroscopy, thermogravimetric analysis/differential thermal analysis (TGA/DTA), and X-ray photoelectron spectroscopy (XPS).nickel ions can interact with the support and the strength of decomposition will be affected by above factors.

The differences in decomposition patterns will affect the interactions of nickel ions with the support affecting the final structure and activity of the catalyst. 60 70 80 90 mass loss.steels (Table 4) are chromium-nickel types, some containing other alloying ele-ments, such as copper or aluminum.

They can be hardened by solution treating and aging to high strength. Table 4 PRECIPITATION HARDENING STAINLESS STEELS UNS UNS S S S S Duplex stainless steels (Table 5) have an annealed structure which is typically.