CBRE
Question
Asked 24 July 2024
Mechanochemistry: ball to powder mass or ball to powder volume?
I run mechanochemical reactions that involves the use of a large amount of catalyst (1:1 molar ratio to the reactant). When I try to understand the effect of amount of catalyst on the reaction, I find it very hard to get consistent results when I control the the ball to powder mass ratio (I am using the same number of balls, but keeping the total powder mass the same while adjusting the mass between the reactant and catalyst). This makes me think that I should probably control ball to powder volume. However, even though I know the rough bulk volume of two things at the beginning, the powder volume will always increase by an unknown amount once it is milled. So how should I control my reaction??
All Answers (1)
It is not easy to define the controls of your reaction. Don't think you can use a simple control or two to define your experiments. Breifly, you should consider the controls of mass, volume, particle size distribution (PSD), surface property (not all inclusive) of catalyst and reactant, as well as their ratios to define your reactions.
Similar questions and discussions
Related Publications
With the progress of science and technology, China has gradually attached importance to research and exploration in chemistry, and the achievements in exploring mechanochemistry are also quite significant. Therefore, it is necessary to study and explore mechanochemistry. This article mainly discusses the application of mechanochemistry in powder an...
The results of studying the effect of mechanical action on reactivities of mixtures of powdered monoatomic crystals have been analyzed. The following idea has been discussed: when the dose of mechanical energy absorbed is commensurable with crystal energy, a dynamic equilibrium between disordering and spontaneous regeneration of crystalline structu...
Ultrafine powders SrZnO2:Sm3+, M+(M = Li, Na, K) were prepared by a mechanochemical process and thermal decomposition. The X-ray diffraction patterns, scanning electron microscope and photoluminescence spectra were carried out to characterize their structural, morphological and luminescent properties. Mole ratios (n(Sm3+):n(Li+)) were investigated....