Investigation of pitch deposits throughout the fiber line of softwood pulp mill

Autor: Jinze Dou, Klaus Niemelä, Tiina Haatainen, Pekka Tervola, Janne Vehmaa

Publikováno v: Dou, J, Niemelä, K, Haatainen, T, Tervola, P & Vehmaa, J 2023, ' Investigation of pitch deposits throughout the fiber line of softwood pulp mill ', Journal of Cleaner Production, vol. 405, 136940 . https://doi.org/10.1016/j.jclepro.2023.136940

The formation of detrimental pitch deposits can cause various problems at pulp and paper mills, as they can contribute to unscheduled shutdowns and even paralyze the operation of the entire mills. To understand, avoid and control of pitch deposits fo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36b9e5f05669934fe97230ee9ada1141
https://cris.vtt.fi/en/publications/ebd9bdcc-4cf1-4967-9bec-2b77b5309a34

Fourier series solution for multistage countercurrent cake washing and segregated wash effluent circulation

Autor: Pekka Tervola

Publikováno v: Chemical Engineering Science. 61:3268-3277

A Fourier series solution method was developed for solving a multistage countercurrent cake washing problem, so that the solute concentration gradient inside a cake between washing stages was preserved. The cake washing process was described by the a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1247007343b2725da1856cd3d83eb1aa
https://doi.org/10.1016/j.ces.2005.12.010

A new analytical method to solve the heat equation for a multi-dimensional composite slab

Autor: Xiaoshu Lü, Martti Viljanen, Pekka Tervola

Publikováno v: Journal of Physics A: Mathematical and General. 38:2873-2890

A novel analytical approach has been developed for heat conduction in a multi-dimensional composite slab subject to time-dependent boundary changes of the first kind. Boundary temperatures are represented as Fourier series. Taking advantage of the pe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::47851d42c7dc93f944dea29e99d17818
https://doi.org/10.1088/0305-4470/38/13/004

Model describing Donnan equilibrium, pH and complexation equilibria in fibre suspensions

Autor: Per Stenius, Erkki Räsänen, Pekka Tervola

Publikováno v: Nordic Pulp & Paper Research Journal. 16:130-139

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::36a1e6aa5d1bfc0d90bc32773cc3fa2e
https://doi.org/10.3183/npprj-2001-16-02-p130-139

Modelling of chemical pulp bleaching

Autor: Susanna Kuitunen, Ville Tarvo, Tapani Vuorinen, Pekka Tervola, Juhani Aittamaa, Kaj Henricson, Tarja Tamminen, Erkki Räsänen, Tuula Lehtimaa

Publikováno v: Scopus-Elsevier
Tarvo, V, Kuitunen, S, Lehtimaa, T, Tervola, P, Räsänen, E, Tamminen, T, Aittamaa, J, Vuorinen, T & Henricson, K 2008, ' Modelling of chemical pulp bleaching ', Nordic Pulp and Paper Research Journal, vol. 23, no. 1, pp. 91-101 . https://doi.org/10.3183/NPPRJ-2008-23-01-p091-101

Conventional pulp bleaching processes consist of the following unit operations: chemical mixing, bleaching reactions (retention towers) and pulp washing. The quality and profitability of chemical pulp bleaching depends on how well one is able to util

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::46f5674010ee6d1c63b7fb5b4b3922b4
http://www.scopus.com/inward/record.url?eid=2-s2.0-50949085594&partnerID=MN8TOARS