Ultrasonic pretreatment of cowpea bean pod biomass with addition tripotassium phosphate (K3PO4) was used to induce the production bio-oil enriched in phenolic compounds. An ultrasound bath operating at 40 kHz, 154 W power, and constant biomass:K3PO4 ratio 5:1 (m/m) for pretreatments different durations: 0.5, 1.5, 3, 6, 8, 12 h. After pretreatment, pyrolyzed a fixed bed reactor 600 °C, under flo...

This study presents a zinc oxide (ZnO) film deposited on a glass substrate by ultrasonic spraying pyrolysis. The ZnO nanostructure was formed by treating the as-deposited ZnO films with hydrogen. The root-mean-square (RMS) roughness increases from 5.83 nm to 12.53 nm during the treatment for 20 min, but slightly decreases to 11.87 nm at a treatment time of 30 min. In the range 400-500 nm, the t...

The current understanding of droplet generation processes from liquid films is reviewed. Films are defined as liquids with one free and one wall-bound surface. In many of the systems where films occur atomization is an undesirable side-effect of the two-phase flow. The motivation for this study, however, is a process where atomization from the film is the goal—a gas-centered swirl coaxial rocke...

The development of new multicomponent nanoparticles is gaining increasing importance due to their specific functional properties, i.e., synthesised complex concentrated (CCNPs) in the form powder using ultrasonic spray pyrolysis (USP) and lyophilisation from initial cast Ag20Pd20Pt20Cu20Ni20 alloy, which was function material after its catalytic abilities had been exhausted. Hydrometallurgical ...