Essays about: "theoretical chemistry"

Showing result 21 - 25 of 41 essays containing the words theoretical chemistry.

  1. 21. Geochemical processes in mine waste subjected to a changing chemical environment: Fe speciation in leachate water from column experiments

    University essay from Luleå tekniska universitet/Geovetenskap och miljöteknik

    Author : Paula Lundberg; [2017]
    Keywords : Sulfidic mine waste; Sulfide oxidation; Water quality; Environmental analytical chemistry; Iron redox speciation;

    Abstract : Oxidation of sulfidic mine waste is of significant environmental concern due to the consequent formation of acid rock drainage (ARD), deteriorating the water quality of natural water systems. Iron (Fe) and sulfur (S) are two major redox elements involved in these reactions and typically the major redox-sensitive elements (whose solubility, speciation, and mobility are affected by pH and Eh) in water affected by ARD. READ MORE

  3. 22. Dissolution kinetic study of limonene in supercritical carbon dioxide by in-situ Raman spectroscopy

    University essay from Lunds universitet/Kemiska institutionen

    Author : Cristiana Buzolin; [2016]
    Keywords : limonene; Raman spectroscopy; supercritical carbon dioxide; dissolution kinetics; solubility; analytical chemistry; analytisk kemi; Chemistry;

    Abstract : Understanding the dissolution kinetics is important in the experimental determination of solubility, the efficiency of extractions, the rate of reactions and in general any heterogeneous process. Despite the extensive use of supercritical fluids, studies regarding the dissolution kinetics of compounds in supercritical carbon dioxide (scCO2) using analytical methods are limited in the literature. READ MORE

  4. 23. On the assessment of pollutant emissions: the role of flue gas flow rate measurement : Critical review and industrial feedback

    University essay from KTH/Energiteknik

    Author : Juliette Chatel; [2016]
    Keywords : ;

    Abstract : From a bottom-up perspective, the assessment of flow rate of stack flue gases is crucial being the very first brick of the calculation. With the concentration of pollutant, it gives access to the amount of pollutant released in the atmosphere. READ MORE

  5. 24. Role of annealing and photostability of organo-metal-halide semiconductors for solar cell applications

    University essay from Lunds universitet/Centrum för analys och syntes

    Author : David Sörell Jonsson; [2016]
    Keywords : materials chemistry; materialkemi; Chemistry;

    Abstract : Methyl ammonium lead halides (MAPbX3 , X=Cl-, Br-,I-), crystallizing in a perovskite structure, have in recent years been shown to be a promising material as a light harvesting material in solar cells. It has many interesting properties which makes it suitable for solar cell applications, such as near-optimal band gap and long electron-hole diffusion lengths, as well as the possibility of synthesizing the films from solution based methods. READ MORE

  6. 25. Analysis and Implementation of Adaptive Explicit Two-Step Methods

    University essay from Lunds universitet/Matematik LTH

    Author : Kjartan Kari Gardarsson Myrdal; [2015]
    Keywords : numerical methods; two-step; variable; multistep methods; ODE; adaptive; differential equations; parametric; explicit; Mathematics and Statistics;

    Abstract : Recently a new way of constructing variable step-size multistep methods has been proposed, that parametrizes the entire domain of multistep methods. In the presented work the case of explicit two-step methods is looked at, analyzed and related to the already known theory of multistep methods. READ MORE