Comparison of Eucalyptus camadulensis bleaching results between O-Q-(OP)-Z-Q-(PO) and O-Q-(OP)-Paa-Q-(PO) | |
| Author | Sun, Beisong |
| Call Number | AIT Thesis no.PP-06-7 |
| Subject(s) | Eucalyptus camaldulensis Pulp mills Pulping |
| Note | A thesis proposal submitted in partial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | The main driving force for "Totally chlorine free" (TCF) bleaching is the issue of chloro-organics, bleaching with oxygen, ozone, peracetic acid and hydrogen peroxide. Eucalyptus camaldulensis comes from Thailand as the raw material. Lab cooked Kraft pulp with Kappa number at 20.3 and 15.1 were canied out two stages 02-delginified. Comparison was carried out through two TCF bleaching processes Q-(OP)-Z-Q-(PO), Q-(OP)-Paa-Q-(PO) and one ECF D-(EOP)-D bleaching process. From a point view of fiber and paper quality, process parameters and end quality were analyzed and compared through various measurements. The results show that TCF bleaching processes can reach full brightness and high viscosity with high cooking kappa number pulp. But poor viscosity got from low kappa TCF bleached pulp. TCF bleached pulp has much higher HexA content and lower brightness reversion compared with ECF bleached pulp. TCF bleaching can get high pulp yield. Also good paper strength can be achieved by TCF bleached pulp |
| Year | 2006 |
| Type | Thesis |
| 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 O. |
| Examination Committee(s) | Lehtinen, Esa;Vilpponen, Aki |
| Scholarship Donor(s) | Government of Finland - AIT Fellowship |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2006 |