Effect of temperature on ECF-bleaching of Eucalyptus camaldulensis kraft pulp | |
| Author | Nguyen Van Duy |
| Call Number | AIT Thesis no.PP-07-18 |
| Subject(s) | Kraft paper Eucalyptus camaldulensis Wood-pulp--Bleaching |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Pulp and Paper Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Eucalyptus Camaldulensis oxygen delignification bleached with D0EopD1 with different temperatures in Do stage. At the same chemical charge higher temperature is improving brightness, brightness reversion, and consumption chemical. The higher temperature, lower HexA and low brightness loss. The higher temperature is reducing residual chemical and lose viscosity. Higher pH in D1 improved brightness and brightness stability pulp. Very high lignin-kappa reduction 90°C in D1stage.The HexA-kappa reduction is quite similar 30 min in Do stage. At 60°C, 30 min is good effective remove HexA in Do stage. Bleached higher temperature gives to us the lowest residual chemical all temperatures. The brightness reached to 90%ISO in high temperature Bleaching in high temperature ability lower brightness loss is very good, using high temperature in D1 stage is lower than in Do stage. The D0EopD1 sequence is effective reached high brightness when using short retention time and high temperature. Shorter stage is to get 90% ISO brightness should be to invest pulp bleached. High temperature, longer retentions will consume ClO2 in reaction bleaching. Total ClO2 consumption is not too high in D stage reached high brightness. Optimization temperature and retention time achieved quality pulp. The effect of temperature was not too much strength properties such as tensile strength, tear index, roughness, coarseness, opacity. |
| Year | 2007 |
| 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) | Finland;AIT Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2007 |