Evaluation of oxygen delignification process on removing lipophilic extractive of acacia mangium and Acacia crassicarpa | |
| Author | Sanyoto, Ari Aji |
| Call Number | AIT Thesis no.PP-10-03 |
| Subject(s) | Acacia Mangium Kraft paper |
| Note | A thesis submitted in partial fulfillment of the requirement s for the degree of Master of Engineering in Pulp and Paper Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. PP-10-03 |
| Abstract | Extractive content and pulp strength properties evaluation of Acacia mangium and Acacia crassicarpa by difference of alkali charge and pulp consistency in oxygen delignification reactor and variation of chlorine dioxide charge in D 0 bleaching stage were the core objective of this study. Acacia c rassicarpa and Acacia mangium chips were cooked in a laboratory scale digester with the same condition to get similar kappa number. Those alkali charges in oxygen delignification process were 1.5%, 2.5% and 3.5% and the consistencies were high (22%), medium (15%), and low (8%). The chlorine charge in D0 bleaching stage was varying 1.5% and 2.5%. After oxygen delignification, ECF bleaching with D 0 - E - D 1 - D 2 sequence is applied. Outcome from laboratory scale oxygen delignification reactor these two of Acacia species show that Acacia mangium has higher extractive content and is relatively lower reduction compared to A cacia crassicarpa. Alike manners of both Acacia pulps was observed in D 0 bleaching stage; more ever, the extractive reduction is improved by addition of chlorine charge. Enhanced bleachability and higher brightness ceiling were reached by Acacia crassicarpa in bleaching. In pulp strength properties analyses, both Acacia species have similar tendency. However, Acacia crassicarpa had higher significance than Acacia mangium. Oxygen delignification results in both acacia species show that high alkali charge was more reducing the extractive content. It has higher brightness level, improved bleachability, and to some extent better internal bonding; unfortu nately, high alkali charge has lower tensile index. The pulp consistency adjustment is also indicating similarity trend with addition of alkali charge; conversely, the extractive reduction is decreased severely. |
| Year | 2010 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. PP-10-03 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| 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) | Bharti, Shashank |
| Examination Committee(s) | Nazshad, Mousa M.;Sawitree Pisuttipiched |
| Scholarship Donor(s) | APRIL - PT. Riau Andalan Pulp and Paper |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2010 |