Impact of Selective Refining Combined with Inter-stage Ozone Treatment on Thermomechanical Pulp

BioResources

Michel Épiney¹  Jean-Noël Cloutier²  Éric Pelletier³  Yu Sun⁴  Robert Lanouette⁴ 

[1] Air Liquide Inc.;Hydro-Québec;Kruger Inc.;Research Centre on lignocellulosic material, UQTR;

关键词: Ozone;    TMP;    Fractionation;    Selective refining;    Properties;    Energy reduction;   

DOI  :  10.15376/biores.9.1.1225-1235

来源: DOAJ

【 摘 要 】

The aim of this study was to evaluate the performance of selective refining combined with ozone inter-stage treatment in a TMP process. A fractionation process was carried out to separate the primary pulp into two fractions, a long-fibre fraction and a short-fibre fraction. Different charges of ozone, namely 1%, 1.5%, and 2%, were used to treat the long-fibre fraction, and only the treated pulp went to the second refining stage. Finally, the secondary pulp was recombined with the primary short-fibre fraction to be compared to a control TMP trial. Results showed that 21% of the total refining energy can be saved when 1.5% ozone inter-stage treatment is applied before selective refining compared with whole pulp refining, when the pulp freeness is 100 mL. At this level of ozone charge, a slight increase in tensile strength is observed with no significant variation in tear index.

【 授权许可】

Unknown