Publication
Barium sulfate precipitation as model reaction for segregation studies at pilot scale
Résumé
The pptn. of barium sulfate from a basic EDTA complex upon addn. of a small vol. of acid in a stirred-tank reactor was used as a model reaction to study the local state of micromixing. Limitations and modifications of this reaction are presented, and its application on an industrial pilot scale is realized. A higher reaction rate is used in order to decrease the reaction time by using different concns. of reactants which modify the stability of the ppt. A study of this stability is presented. [on SciFinder (R)]
Source officielle
À propos de ce résultat
Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.
Proximité ontologique
Concepts associés (33)
Reaction rate
The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time. Reaction rates can vary dramatically. For example, the oxidative rusting of iron under Earth's atmosphere is a slow reaction that can take many years, but the combustion of cellulose in a fire is a reaction that takes place in fractions of a second.
Réaction chimique
Une réaction chimique est une transformation de la matière au cours de laquelle les espèces chimiques qui constituent la matière sont modifiées. Les espèces qui sont consommées sont appelées réactifs ; les espèces formées au cours de la réaction sont appelées produits. Depuis les travaux de Lavoisier (1777), les scientifiques savent que la réaction chimique se fait sans variation mesurable de la masse : , qui traduit la conservation de la masse. thumb|La réaction aluminothermique est une oxydo-réduction spectaculaire.
Rate equation
In chemistry, the rate law or rate equation for a chemical reaction is a mathematical equation that links the rate of forward reaction with the concentrations or pressures of the reactants and constant parameters (normally rate coefficients and partial reaction orders). For many reactions, the initial rate is given by a power law such as where [\mathrm{A}] and [\mathrm{B}] express the concentration of the species \mathrm{A} and \mathrm{B}, usually in moles per liter (molarity, M).
Publications associées (59)
Flowing Gas Experiments Reveal Mechanistic Details of Interfacial Reactions on a Molecular Level at Knudsen Flow Conditions
Christian Ludwig, Michel Rossi, Riccardo Iannarelli
Knudsen flow experiments and its interpretation in terms of adsorption/desorption kinetics as well as quantitative uptake on substrates of interest is presented together with the description of critical design parameters of the Knudsen Flow Reactor (KFR). ...
2022Assessing the value of kinetic results from biochemical methane potential tests: Reproducibility from a large inter-laboratory study
Kinetic information extracted from biochemical methane potential (BMP) tests is often reported but its value is unclear. Inter-laboratory reproducibility provides a useful indication of its value. Here we extracted estimates of the first-order rate constan ...
2022A spectroscopic inference and SOLPS-ITER comparison of flux-resolved edge plasma parameters in detachment experiments on TCV
Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Artur Perek, Kevin Henricus Annemarie Verhaegh, Mirko Wensing
This work presents the use of a collisional-radiative model to infer plasma parameters from 2D emissivities of several deuterium Balmer lines. The emissivities were obtained by MANTIS, an absolutely calibrated, ten-camera imaging polychromator with
IOP Publishing Ltd2022MOOCs associés (3)
Water quality and the biogeochemical engine
Learn about how the quality of water is a direct result of complex bio-geo-chemical interactions, and about how to use these processes to mitigate water quality issues.
Sorption and transport in cementitious materials
Learn how to study and improve the durability of cementitious materials.
Cement Chemistry and Sustainable Cementitious Materials
Learn the basics of cement chemistry and laboratory best practices for assessment of its key properties.