Kinetic study on iso-concentration hydrogen peroxide bleaching of poplar chemi-thermomechanical pulp by the process of continuous chemical supplement
| Autor: | Lichun Zhou, Haizhen Shi, Qingxi Hou, Sun Xianqi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Order of reaction Pulp (paper) 0208 environmental biotechnology Kinetics Bioengineering 02 engineering and technology Activation energy 010501 environmental sciences engineering.material Chromophore 01 natural sciences Peroxide 020801 environmental engineering Reaction rate chemistry.chemical_compound chemistry Chemical engineering engineering Hydrogen peroxide Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | BioResources. 13:5408-5415 |
| ISSN: | 1930-2126 |
| Popis: | In the authors’ previous studies, a bleaching process based on continuous chemical supplementation (CCS) was proposed to improve the effectiveness of peroxide bleaching of chemi-thermomechanical pulp (CTMP). In this study, the kinetic model of the CCS process of peroxide bleaching was applied to poplar CTMP to explore how the bleaching rate was affected. The model was based on the rate of chromophore elimination characterized by the brightness gains of bleached pulp. The reaction rate of chromophore destruction proceeded via a rapid initial phase followed by a slow phase. The equation of reaction rate was confirmed. The value of reaction order was -3.62, and the activation energy was 288.8 kJ/mol. The developed kinetic model was a good fit for the experimental results. |
| Databáze: | OpenAIRE |
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