Detailed Modeling of Kraft Pulping Chemistry. Delignification
| Autor: | Ville Alopaeus, Tapani Vuorinen, Susanna Kuitunen, Kyösti Ruuttunen, Olesya Fearon |
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| Přispěvatelé: | Department of Bioproducts and Biosystems, Neste Jacobs Oy, Department of Chemical and Metallurgical Engineering, Aalto-yliopisto, Aalto University |
| Rok vydání: | 2020 |
| Předmět: |
Chemistry
General Chemical Engineering fungi food and beverages 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Pulp and paper industry complex mixtures Chemical reaction Industrial and Manufacturing Engineering chemistry.chemical_compound 020401 chemical engineering Kraft process Solubilization Lignin 0204 chemical engineering 0210 nano-technology |
| Zdroj: | Fearon, O 2020, ' Detailed Modeling of Kraft Pulping Chemistry. Delignification ', Industrial & Engineering Chemistry Research, vol. 59, no. 29, pp. 12977-12985 . https://doi.org/10.1021/acs.iecr.0c02110 |
| ISSN: | 1520-5045 0888-5885 |
| Popis: | This work introduces a phenomena-based model for delignification in the kraft pulping process. The solubilization of lignin is described as a set of chemical reactions representing the entire chemistry of lignin degradation as well as dissolution of the degraded lignin. For modeling, reaction mechanisms and reactions kinetics derived mainly from the literature were used. Each reaction was simulated separately and then combined for the overall degradation. The model was validated with experimental results from pine wood meal pulping under a wide range of reaction parameters. The experimental data presented a good fit with the model. With the aid of the model, the structure and the amount of wood components, in fibers and black liquor, can be determined at any pulping stage. Several engineering parameters can be computed from the detailed chemical composition of liquor and wood or chemical pulp. These include, e.g., kappa number, brightness, yield, active alkali, effective alkali, sulfidity, and higher heating value. |
| Databáze: | OpenAIRE |
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