Effects of cooking parameters on the quality of kraft pulp of Eucalyptus camaldulensis | |
| Author | Fenny Nilawati Kusuma |
| Call Number | AIT RSPR no. PP-03-01 |
| Subject(s) | Eucalyptus camaldulensis Sulphate pulping process |
| Note | A research study submitted in partial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Eucalyptus camaldulensis or river red gum is one of the various species of hardwood, which is converted to be pulp for the manufacture of paper and paperboard by pulping process. To identify the cooking parameters on kraft pulping process is an important problem for both the technology and economic point of view. The aim of this research was to study the effect of effective alkali charge, temperature and time at cooking, liquor to wood ratio, and sulfidity, on the pulp yield and lignin content in the case of Eucalyptus camaldulensis pulping process. The 2v5 - 1 design was used to perfo1m in the research experiment. Oxygen delignification and Do(Eop )D1 or DoED1 bleaching stage were performed in this research study. The data processing in this research study used MINITAB as a statistical software. The cooking result for kappa number was 12.5 and for cooking yield was 57.1 %. The lowest kappa number was obtained on the condition at high EA charge, high temperature, short time at cooking, low L/W, and high sulfidity. The lowest residual alkali was obtained on the condition at low EA charge, high temperature, longer time at cooking, low L/W, and high sulfidity. The highest total bleached yield was obtained on the two conditions. The first condition is at low EA, high cooking temperature, short cooking time, high L/W and high sulfidity. The second condition is at low EA, low cooking temperature, short cooking time, high L/W and low sulfidity. The higher EA obtained lower kappa number, lower cooking yield, higher residual alkali, and lower viscosity of bleached pulp. Cooking conditions at high temperature consume more alkali that gives lower residual alkali at the end of cook. Higher temperature obtained lower kappa number, lower cooking yield, and lower viscosity of bleached pulp. Lower residual alkali is obtained with longer time and also lower L/W. The high L/W changed EA concentration to lower and increased kappa number as well. High L/W gives a high cooking yield. L/W has bigger main effects on viscosity of bleached pulp than the others. L/W and cooking time have bigger main effects on total bleached yield. Lower kappa number consumed small amount of chlorine dioxide and obtained higher final brightness and lower viscosity of bleached pulp. Cooking conditions were not optimized in this study for achieving the best selectivity. |
| Year | 2003 |
| Type | Research Study Project Report (RSPR) |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Pulp and Paper Technology (PP) |
| Chairperson(s) | Malinen, Raimo |
| Examination Committee(s) | Kolehmainen, Heikki;Huynh Trung Luong |
| Scholarship Donor(s) | Government of Finland I AIT Fellowship |
| Degree | Research Studies Project Report (M.Eng.) - Asian Institute of Technology, 2003 |