Controlled Metal-Support Interactions in Au/CeO-Mg(OH) Catalysts Activating the Direct Oxidative Esterification of Methacrolein with Methanol to Methyl Methacrylate.

The strong metal-support interaction (SMSI) between the three components in Au/CeO-Mg(OH) can be controlled by the relative composition of CeO and Mg(OH) and by the calcination temperature for the direct oxidative esterification of methacrolein (MACR) with methanol to methyl methacrylate (MMA). The composition ratio of CeO and Mg(OH) in the catalyst affects the catalytic performance dramatically. An Au/CeO catalyst without Mg(OH) esterified MACR to a hemiacetal species without MMA production, which confirmed that Mg(OH) is a prerequisite for successful oxidative esterification.

Catalytic Effects of Zeolite Socony Mobil-5 (ZSM-5) on the Oxidation of Acoustically Levitated -Tetrahydrodicyclopentadiene (JP-10) Droplets.

Jet propulsion 10 (JP-10) droplets with and without aluminum nanoparticles in conjunction with HZSM-5 zeolite and surfactants were ultrasonically levitated, and their oxidation processes were explored to identify how the oxidation process of JP-10 is catalytically affected by the HZSM-5 zeolites and how the surfactant and Al NPs in the system impacted the key experimental parameters of the ignition such as ignition delay time, burn rate, and the maximum temperatures. Singly levitated droplets were ignited using a carbon dioxide laser under an oxygen-argon atmosphere. Pure JP-10 droplets and JP-10 droplets with silicon dioxide of an identical size distribution as the zeolite HZSM-5 did not ignite in strong contrast to HZSM-5-doped droplets.