Electrosynthesis process has been used for preparation of zinc sulfide nanoparticles. Zinc sulfide nanoparticles in different size and shapes were electrodeposited by electrolysis of zinc plate as anode in sodium sulfide solution. Effects of several reaction variables, such as electrolysis voltage, sulfide ion concentration as reactant, stirring rate of electrolyte solution and temperature on p...

Abstract. Biodiesel production from waste such as wastewater sludge, palm oil mill effluent and dairy provide more sustainable approach greener energy. This paper analyzes the kinetic modelling for biodiesel scum via microwave heating transesterification. The results this study show that transesterification of is a first order which defines dependent on concentration one reactant linearly. acti...

The diffusion of a reactant to a binding target plays a key role in many biological processes. The reaction radius at which the reactant and target may interact is often a small parameter relative to the diameter of the domain in which the reactant diffuses. We develop uniform in time asymptotic expansions in the reaction radius of the full solution to the corresponding diffusion equations for ...

The aza-Michael addition is a versatile reaction for the modification of ?,?-unsaturated carbonyl compounds with amines. reactivity dimethyl itaconate as bio-based Michael acceptor explored in this work. Through its reactions piperidine and dibutylamine, it was found that order can be changed by choice catalyst, solvent, or concentration amine reactant. effectiveness catalysts proportional to t...

The focus in this study is on the formation of NO2 molecule O+NO system, which atom-diatom reaction that occurs most according to molecular concentrations formed as a result lightning flashes. In study, it was mentioned another external effect affects concentrations, other than temperature and visible electromagnetic radiation, electric field. This will suppress O2 at high temperatures NO conce...

Using COMSOL Multiphysics 3.5, a numerical model has been developed to determine the effect of the channel geometry and electrode configuration on cell performance based on polarization curves. The Butler-Volmer equation was implemented to determine the reaction rates at the electrodes. The Conductive Media DC module is used to model the electric fields within the fuel cell. The concentration d...