From catalyst preparation toward catalyst synthesis

Rhenium Nanochemistry for Catalyst Preparation

The review presents synthetic approaches to modern rhenium-based catalysts. Creation of an active center is considered as a process of obtaining a nanoparticle or a molecule, immobilized within a matrix of the substrate. Selective chemical routes to preparation of particles of rhenium alloys, rhenium oxides and the molecules of alkyltrioxorhenium, and their insertion into porous structure of ze...

Catalyst preparation for CMOS-compatible silicon nanowire synthesis.

Metallic contamination was key to the discovery of semiconductor nanowires, but today it stands in the way of their adoption by the semiconductor industry. This is because many of the metallic catalysts required for nanowire growth are not compatible with standard CMOS (complementary metal oxide semiconductor) fabrication processes. Nanowire synthesis with those metals that are CMOS compatible,...

Mixed Alcohol Synthesis Catalyst Screening

Preparation of nanostructured nickel aluminate spinel powder from spent NiO/Al2O3 catalyst by mechano-chemical synthesis

0921-8831/$ see front matter 2011 The Society of doi:10.1016/j.apt.2011.11.004 ⇑ Corresponding author. Address: School of Metallu ing, University of Tehran, P.O. Box 14395-1491, Tehran fax: +98 21 88006076. E-mail address: [email protected] (S. Sheibani). In this paper, the possibility of mechano-chemical synthesis, as a single step process for preparation of nanostructured nickel aluminate sp...

Study of Catalyst and Co- Catalyst Effect on Preparation of Lubricant from Heavy Propylene Tetramer (HPT)

In this research we used Heavy Propylene Tetramer (HPT) and A1C13 —BF3 (Lewis acids) ascatalyst and ethanol, n-propanol and n-butanol as co-catalyst. Using Lewis acids as catalyst, theHPTs form molecules with higher molecular weight. Since the raw materials of the reaction are byproducts of other reactions, are not pure and contain various compounds with different M.W andalso different chemical...