Novel thermodynamic and kinetic investigation of ammonium carbamate decomposition into urea and water
| Autor: | Bernard Claudel, E. Brousse, G. Shehadeh |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Carbamate
Aqueous solution Chemistry medicine.medical_treatment Enthalpy Inorganic chemistry Thermodynamics Condensed Matter Physics Decomposition chemistry.chemical_compound medicine Urea Ammonium carbamate Physical and Theoretical Chemistry Instrumentation Chemical decomposition Equilibrium constant |
| Zdroj: | Thermochimica Acta. 102:357-371 |
| ISSN: | 0040-6031 |
| DOI: | 10.1016/0040-6031(86)85344-8 |
| Popis: | The reversible decomposition of ammonium carbamate into urea and water has been reinvestigated, from the thermodynamic and kinetic standpoints. The equilibrium conditions have been reached from the right-hand side components. The equilibrium medium is then liquid. From the equilibrium constant relative to molal fractions, an enthalpy variation for the forward reaction of 5.5 kcal mol−1 can be derived. The kinetics of this forward reaction have been investigated in conditions where the carbamate remains partly solid. It follows the Prout-Tompkins law, which is interpreted by the ability for water in contact with the solid to create germs of its decomposition. The activation energy of reaction 1 is about 10 kcal mol−1. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|