Solid acid catalysts in heterogeneous n-alkanes hydroisomerisation for increasing octane number of gasoline

Heterogeneous Catalysis and Solid Catalysts

Phthalimide-N-sulfonic acid and Isatin-N-sulfonic acid as highly efficient catalysts for the synthesis of bis-coumarins

Two highly efficient protocols for the production of bis-coumarins under solvent-free conditions have been introduced. The reaction of 4-hydroxycoumarin (2 eq.) with arylaldehydes (1 eq.) using phthalimide-N-sulfonic acid (PhtSA) or isatin-N-sulfonic acid (IsSA), as solid-acid catalysts, afforded the mentioned compounds with good to excellent yields in short times.Briefly, we have introduced tw...

A Historical Analysis of the Co-evolution of Gasoline Octane Number and Spark-Ignition Engines

In this work, the authors reviewed engine, vehicle, and fuel data since 1925 to examine the historical and recent coupling of compression ratio and fuel antiknock properties (i.e., octane number) in the U.S. light-duty vehicle market. The analysis identified historical time frames and trends and illustrated how three factors – consumer preferences, technical capabilities, and regulatory legisla...

Terahertz vibrational modes induced by heterogeneous nucleation in n-alkanes

0009-2614/$ see front matter 2010 Elsevier B.V. A doi:10.1016/j.cplett.2010.05.075 * Corresponding author. E-mail address: [email protected] (D.M. Mittleman) We describe the observation of a broad and strongly temperature-dependent peak in the terahertz absorption spectrum of several linear n-alkanes. On cooling from the liquid into the rotator phase, the absorption is enhanced within a very narr...

Nanostructured Catalysts in Activation of Light Alkanes

The activation of small alkane molecules originating from natural gas or renewable resources on metal oxide surfaces regains increasing scientific interest since direct utilization of saturated hydrocarbons will offer alternative pathways to higher value chemicals in a postpetroleum era. The focus of the project lies on oxidation catalysis of small alkane molecules including methane, ethane, pr...