Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Kyösti Ruuttunen"'
Publikováno v:
Cellulose. 30:169-182
The authors thank Markus Kyllönen for his help in running some of the bleaching experiments, and to Yibo Ma for his guidance on the hemicellulose extraction procedure with EMIM OAc. Open Access funding provided by Aalto University. This work was cof
Publikováno v:
Fearon, O 2020, ' Detailed Modeling of Kraft Pulping Chemistry. Delignification ', Industrial & Engineering Chemistry Research, vol. 59, no. 29, pp. 12977-12985 . https://doi.org/10.1021/acs.iecr.0c02110
This work introduces a phenomena-based model for delignification in the kraft pulping process. The solubilization of lignin is described as a set of chemical reactions representing the entire chemistry of lignin degradation as well as dissolution of
This study investigated the non-catalyzed solvolysis of sulphur free organosolv lignin using mixtures of organic solvents (methanol, ethanol and 2-methyltetrahydrofuran) and water with emphasis on the novel biphasic 2-methyltetrahydrofuran (2-MTHF)/w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9bcb7a99a7c87f3e38eaa21b64f4c07
https://aaltodoc.aalto.fi/handle/123456789/40478
https://aaltodoc.aalto.fi/handle/123456789/40478
Autor:
Raimo Alén, Susanna Kuitunen, Tapani Vuorinen, Vesa Nykänen, Kyösti Ruuttunen, Ville Alopaeus, Olesya Fearon
Publikováno v:
Fearon, O 2020, ' Detailed modeling of the kraft pulping chemistry: carbohydrate reactions ', AIChE Journal, vol. 66, no. 8, e16252 . https://doi.org/10.1002/aic.16252
The article introduces a detailed model for carbohydrate chemistry in kraft pulping. This article is continuation to the modeling work carried out for hot water extraction and chemical pulp bleaching. The model includes galactoglucomannan, xylan, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::802ee5989395237cce72ab8f7e92e81c
http://urn.fi/URN:NBN:fi:jyu-202004282948
http://urn.fi/URN:NBN:fi:jyu-202004282948
Publikováno v:
Industrial Crops and Products. 172:114004
Funding Information: This work was cofunded by Andritz Oy, Kemira Oyj, Mets? Group, Stora Enso Oyj, UPM Kymmene Oyj, Suzano Pulp and Paper, and Aalto University School of Chemical Engineering. The authors thank Otavio Mambrim, Aino Peltola, Ville Kor
Contemporary multi-stage bleaching processes partially remove residual lignin and hexenuronic acid from cellulosic pulps. The reactions in the steps could be faster and consume smaller amounts of chemicals. Catalytic bleaching (Hcat), utilizing hypoc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83d1db3ca49802f68248e8ab97131064
Autor:
Herbert Sixta, Heidi Meriö-Talvio, Kyösti Ruuttunen, Anne Usvalampi, Syed Farhan Hashmi, Leena Pitkänen
Publikováno v:
Fuel. 271:117573
This research work investigated the use of various metal formates with emphasis on sodium formate for catalyzing depolymerization of organosolv lignin to bio-oils rich in monoaromatic phenolic compounds. The addition of sodium or calcium formate to t
Autor:
Fernando José Borges Gomes, Tapani Vuorinen, Anna-Stiina Jääskeläinen, Kyösti Ruuttunen, Jorge Luiz Colodette, Marcelo Coelho dos Santos Muguet, Leena-Sisko Johansson
Publikováno v:
Muguet, M C D S, Gomes, F J B, Ruuttunen, K, Johansson, L-S, Jääskeläinen, A-S, Colodette, J L & Vuorinen, T 2014, ' Pulping-tailored fiber properties from a novel Brazilian Eucalyptus hybrid ', Holzforschung, vol. 68, no. 3, pp. 273-282 . https://doi.org/10.1515/hf-2013-0114
The chemical composition and morphology of pulp fibers have a significant impact on the properties of fiber products. Pulp samples from a novel unique Eucalyptus triple hybrid [Eucalyptus grandis × (Eucalyptus urophylla × Eucalyptus globulus)] were
Autor:
Kyösti Ruuttunen, Anna-Stiina Jääskeläinen, Jorge Luiz Colodette, Tapani Vuorinen, Marcelo Coelho dos Santos Muguet
Publikováno v:
dos Santos Muguet, M C, Ruuttunen, K, Jääskeläinen, A-S, Colodette, J L & Vuorinen, T 2013, ' Defibration mechanisms of autohydrolyzed Eucalyptus wood chips ', Cellulose, vol. 20, no. 5, pp. 2647-2654 . https://doi.org/10.1007/s10570-013-0023-3
The objective of this study was to evaluate the influence of autohydrolysis on mechanical defibration of Eucalyptus wood chips. The autohydrolysis process changed notably the mechanical properties of Eucalyptus chips. The removal of mainly hemicellul
Autor:
Anna-Stiina Jääskeläinen, Marcelo Coelho dos Santos Muguet, Tapani Vuorinen, Jorge Luiz Colodette, Kyösti Ruuttunen
Publikováno v:
dos Santos Muguet, M C, Ruuttunen, K, Jääskeläinen, A-S, Colodette, J L & Vuorinen, T 2013, ' Thermomechanical pulping of novel Brazilian Eucalyptus hybrids ', Holzforschung, vol. 67, no. 5, pp. 489-495 . https://doi.org/10.1515/hf-2012-0158
The importance of Eucalyptus wood as a sustainable resource is well established. Mechanical pulp production is an energy-intensive process, and methods for decreasing energy demand are needed. In the present article, the structure of Eucalyptus hybri