search query: @keyword hemicelluloses / total: 5
reference: 4 / 5
Author: | Metso, Risto |
Title: | On-line Measurement of Xylan and its Effect on Refining |
Ksylaanin mittaaminen on-line ja sen vaikutukset jauhautuvuuteen | |
Publication type: | Master's thesis |
Publication year: | 2006 |
Pages: | vii + 88 s. + liitt. 11 Language: eng |
Department/School: | Puunjalostustekniikan osasto |
Main subject: | Puunjalostuksen kemia (Puu-19) |
Supervisor: | Vuorinen, Tapani |
Instructor: | Törönen, Marjo ; Teppola, Pekka |
OEVS: | Electronic archive copy is available via Aalto Thesis Database.
Instructions Reading digital theses in the closed network of the Aalto University Harald Herlin Learning CentreIn the closed network of Learning Centre you can read digital and digitized theses not available in the open network. The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/ You can read theses on the Learning Centre customer computers, which are available on all floors.
Logging on to the customer computers
Opening a thesis
Reading the thesis
Printing the thesis
|
Location: | P1 Ark TKK 405 | Archive |
Keywords: | xylan pulp refining multivariate analysis NIR MIR hemicelluloses ksylaani jauhatus monimuuttuja analyysi hemiselluloosat |
Abstract (eng): | Hemicelluloses are the second largest group of chemical compounds in wood and have a significant role in pulp manufacturing. The objective of this study was to develop an online measurement method for xylan using near- and mid-infrared spectroscopy. The IR-units were part of PulpExpert analyzer which can measure many fiber characteristics. Additionally, the aim of the research was to study how different fiber characteristics affect pulp refinability later in the process. Refinability was studied with the help of multivariate analysis and online xylan measurement that was developed. Online measurement models were successfully created for both modules. The NIR-module's prediction capability was poorer. In all, the MIR-module performed better and was less sensitive to interference. Refinability analysis produced no remarkable results. Multivariate analysis showed known correlations which suggested that the analysis was performed adequately. |
ED: | 2006-09-06 |
INSSI record number: 32342
+ add basket
INSSI