Rapid atomic layer deposition (RALD) has been applied to prepare various nanolaminates with repeated multilayer structures. The possible reaction pathways for RALD of the Al2O3/SiO2 nanolaminate using trimethylaluminum (TMA) and tris(tert-butoxy)silanol (TBS) are investigated by using density functional theory (DFT) calculations. The introduction of a Lewis-acid catalyst, TMA, can result in the...

The alkylation process is an important reaction used in refineries to upgrade light olefins and isobutene into a much more highly valued gasoline component. The primary alkylation reaction involves the reaction of isobutene with a light olefin such as butylenes, in the presence of strong acid catalyst to form the high octane. A problem of long standing is to determine the optimal operating cond...

Methyl methacrylate (MMA) has emerged as an essential industrial monomer. However, the toxic by-production and shortage supply of MMA in global market gained great attention. Herein, a one-step synthesis to produce from isobutene via direct oxidative esterification process been demonstrated curb aforementioned downsides. Thermodynamic analysis Gibbs free energy minimization method proved feasib...

BACKGROUND Cyclohexyl acetate and acetone are used as environmentally friendly solvents, while isobutene acts an intermediate in the production of methacrolein, ethers, plastics pharmaceuticals. Two La-zeolite catalysts have been studied for converting acetic acid to cyclohexyl acetate, isobutene. RESULTS La-based zeolites were synthesized from Na-nFAU by ammonium ion exchange, followed lanthan...

The collisionless photodissociation dynamics of isobutene (i-C(4)H(8)) at 193 nm via photofragment translational spectroscopy are reported. Two major photodissociation channels were identified: H + C(4)H(7) and CH(3) + CH(3)CCH(2). Translational energy distributions indicate that both channels result from statistical decay on the ground state surface. Although the CH(3) loss channel lies 13 kca...

Increase of productivity of process urgently requires application of more and technical advance. As is known for deriving of isobutylene, being raw material at development of polyisobutylene and butyl rubbers widely use process of dehydrogenation of isobutylene in pseudoliquid catalyst bed, circulating in reactor-regenerative system. Opportunities of this process in the production conditions co...