Jul 22, 2019   8:13 p.m. Magdaléna
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doc. Ing. Michal Jablonský, PhD.
Identification number: 4025
University e-mail: michal.jablonsky [at] stuba.sk
 
Docent CSc.,PhD. - Department of Wood, Pulp and Paper (IPM FCFT)

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Basic information

Basic information about a final thesis

Type of thesis: Diploma thesis
Thesis title:Optimization of the Oxygen-peroxide Bleaching Reactor to Maximize Brightness and Preserve Pulp Strength
Written by (author): Ing. Ivan Koles
Department: Department of Wood, Pulp and Paper (IPM FCFT)
Thesis supervisor: doc. Ing. Michal Jablonský, PhD.
Opponent:Ing. Josef Kindl
Final thesis progress:Final thesis was successfully defended.


Additional information

Additional information about the final thesis follows. Click on the language link to display the information in the desired language.

Language of final thesis:English

Slovak        English

Title of the thesis:Optimization of the Oxygen-peroxide Bleaching Reactor to Maximize Brightness and Preserve Pulp Strength
Summary:The main goal of this diploma thesis was to improve current state of hydrogen peroxide-reinforced oxygen bleaching tower. The five-level, four-factor experimental design method (DOE) was used for chosen parameter optimization. Factors chosen for DOE were: time, temperature, dosage of NaOH and H2O2. Evaluated parameters were: brightness, fiber strength, kappa number, hemicelluloses content and selectivity of bleaching. We found that chosen factors were in fact statistically significant and had an impact on chosen parameters. We managed to increase brightness by over 15% ISO and decrease kappa number by over 2.5 unit. We were also able to calculate optimal values of the factors to reach desired values of chosen parameters.
Key words:ECF bleaching, Hydrogen peroxide-reinforced oxygen bleaching, Design of experiment, Kraft spruce pulp

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