Results 311 to 320 of about 233,138 (362)

HETEROGENIZED HOMOGENEOUS CATALYSTS*

Annals of the New York Academy of Sciences, 1983
Revue des complexes metal transition-coordinat phosphine a ammonium quaternaire.
Richard T. Smith, R. Kurt Ungar, Laura J. Sanderson, Michael C. Baird   +3 more
openaire   +1 more source

Hybrid chemoenzymatic heterogeneous catalysts

Current Opinion in Green and Sustainable Chemistry, 2021
Through selected recent examples, we show that a new class of catalysts — hybrid chemoenzymatic heterogeneous catalysts — is currently emerging. These multifunctional solid materials have a bright forecast for the development of green and sustainable chemistry.
Damien P. Debecker, Valentin Smeets, Margot Van der Verren, Hippolyte Meersseman Arango, Marty Kinnaer, François Devred   +5 more
openaire   +1 more source

Heterogeneous Metallocene Catalysts

1995
Copolymerizations of olefins were carried out with the SiO2-, AI2O3- and MgCl2-supported Et[IndH4]2ZrCl2 catalysts combined with AIR3 as cocatalyst and the results were compared with those obtained previously in the presence of homogeneous Et[IndH4]2ZrCl2-MAO catalyst.
Kazuo Soga, Manabu Kaminaka, Hyun Joon Kim, Takeshi Shiono   +3 more
openaire   +1 more source

Heterogeneous Catalyst Preparation

2004
In this chapter, the different preparation processes for the synthesis of heterogeneous catalysis are described, including co-precipitation, sol-gel technique and hydrothermal method. The extension to the different steps of industrial scale preparation is also considered.
Graham J. Hutchings, Jacques C. Védrine
openaire   +1 more source

Heterogeneous Catalysts for Biodiesel Production

Energy & Fuels, 2007
The production of biodiesel is greatly increasing due to its enviromental benefits. However, production costs are still rather high, compared to petroleum-based diesel fuel. The introduction of a solid heterogeneous catalyst in biodiesel production could reduce its price, becoming competitive with diesel also from a financial point of view.
DI SERIO, MARTINO, TESSER, RICCARDO, L. Pengmei, SANTACESARIA, ELIO   +3 more
openaire   +3 more sources

Biodiesel production using heterogeneous catalysts

Bioresource Technology, 2011
The production and use of biodiesel has seen a quantum jump in the recent past due to benefits associated with its ability to mitigate greenhouse gas (GHG). There are large number of commercial plants producing biodiesel by transesterification of vegetable oils and fats based on base catalyzed (caustic) homogeneous transesterification of oils. However,
Surbhi, Semwal, Ajay K, Arora, Rajendra P, Badoni, Deepak K, Tuli   +3 more
openaire   +2 more sources

Nickel Catalysts (Heterogeneous)

2014
[7440-02-0] Ni (MW 58.71) InChI = 1S/Ni InChIKey = PXHVJJICTQNCMI-UHFFFAOYSA-N (hydrogenolyses and hydrogenations1) Physical Data: mp 1453 °C; bp 2730 °C; d 8.908 g cm−3. Form Supplied in: powder, rod, wire, foil, or pellet; activated nickel is not commercially available and must be prepared prior to use.
Christopher R. Sarko, Marcello DiMare, Miguel Yus, Francisco Alonso   +3 more
openaire   +1 more source

Model Catalysts: Simulating the Complexities of Heterogeneous Catalysts

Annual Review of Physical Chemistry, 2012
Surface-science investigations have contributed significantly to heterogeneous catalysis in the past several decades. Fundamental studies of reactive systems on metal single crystals have aided researchers in understanding the effect of surface structure on catalyst reactivity and selectivity for a number of important reactions. Recently, model systems,
Feng, Gao, D Wayne, Goodman
openaire   +2 more sources

New enantioselective heterogeneous catalysts

Catalysis Letters, 1997
A new enantioselective heterogeneous catalytic system has been made by partly decomposing (hydrogenolyzing) chiral silyl ethers in hydrogen over Pd black and differently dispersed Pd/SiO2. Preliminary hydrogenations of two prochiral C=C's have demonstrated the feasibility of the method which produced catalysts attaining ee's up to 22%. The chiral silyl
G.V. Smith, J. Cheng, R. Song
openaire   +1 more source

Heterogeneous Metal Complex Catalysts

Russian Chemical Reviews, 1978
The review is devoted to methods of synthesis and catalytic properties of heterogeneous metal complex catalysts in which the selectivity and activity of homogeneous metal complexes and the technological advantages of traditional heterogeneous catalysts are combined.
A Ya Yuffa, Georgii V Lisichkin
openaire   +1 more source