Výsledky vyhledávání - "Stella Rovio,"

Akademický článek

Autor: Lauri Kuutti, Heikki Pajari, Stella Rovio, Juha Kokkonen, Markus Nuopponen

Publikováno v: BioResources, Vol 11, Iss 3, Pp 6050-6061 (2016)

To be regarded as environmentally friendly and economical, an industrial process using 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) oxidation requires recycling and/or recovery of chemicals. In this work, hypochlorite recycling via electrolysis was e

Externí odkaz: https://doaj.org/article/9bd92406e7c04cc48896e67c8fa14fbf

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Akademický článek

Optimisation of Acetic Acid Lignofibre Organosolv Process

Autor: Heli Kangas, Terhi K. Hakala, Tarja Tamminen, Marjo Määttänen, Stella Rovio, Tiina Liitiä, Kristiina Poppius-Levlin

Publikováno v: BioResources, Vol 10, Iss 2, Pp 2699-2718 (2015)

Birch wood chips were cooked in acetic acid in the presence of phosphinic acid according to the Lignofibre (LGF) organosolv process. The cooking trials were performed according to an experimental design with process time, temperature, and the presenc

Externí odkaz: https://doaj.org/article/7ba05805dde64d1c9064a09372d64eeb

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Akademický článek

CATALYSED ALKALINE OXIDATION AS A WOOD FRACTIONATION TECHNIQUE

Autor: Stella Rovio,, Anne Kallioinen,, Tarja Tamminen,, Maija Hakola,, Markku Leskelä,, Matti Siika-aho

Publikováno v: BioResources, Vol 7, Iss 1, Pp 756-776 (2012)

Alkaline oxidation (AlkOx) is an effective fractionation technique for lignocellulosic raw materials. The efficiency of the AlkOx treatment can further be enhanced by using a catalyst (CatOx). Both CatOx and AlkOx provide a fiber fraction containing

Externí odkaz: https://doaj.org/article/d762f27dfade4d0abb95a69bf6e2b7f6

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Optimisation of Acetic Acid Lignofibre Organosolv Process

Autor: Kristiina Poppius-Levlin, Terhi Hakala, Marjo Määttänen, Heli Kangas, Tarja Tamminen, Tiina Liitiä, Stella Rovio

Publikováno v: BioResources, Vol 10, Iss 2, Pp 2699-2718 (2015)
Kangas, H, Hakala, T K, Tamminen, T, Määttänen, M, Rovio, S, Liitiä, T & Poppius-Levlin, K 2015, ' Optimisation of acetic acid lignofibre organosolv process ', BioResources, vol. 10, no. 2, pp. 2699-2718 . < http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_2_2699_Kangas_Acetic_Acid_Lignofibre_Organosolv/3436 >
VTT Technical Research Centre of Finland-PURE

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f029ff771090f42642c28c46c5df6ae9
http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_2_2699_Kangas_Acetic_Acid_Lignofibre_Organosolv

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Stabilization, degradation, and dissolution behavior of Scots pine polysaccharides during polysulfide (K-PS) and polysulfide anthraquinone (K-PSAQ) pulping

Autor: Herbert Sixta, Markus Paananen, Stella Rovio, Tiina Liitiä

Publikováno v: Holzforschung. 69:1049-1058

The behavior of Scots pine (Pinus sylvestris L.) polysaccharides was studied during modified kraft pulping processes of wood meal by polysulfide (K-PS) and polysulfide anthraquinone (K-PSAQ) at the hydroxide ion concentrations of 0.50 and 1.55 M [OH-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::11f2c5c9083d6f783c88e13c66a3adb4
https://doi.org/10.1515/hf-2014-0220

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Sustainability of cellulose dissolution and regeneration in 1,5-diazabicyclo[4.3.0]non-5-enium acetate: a batch simulation of the IONCELL-F process

Autor: Ronny Wahlström, Anna Suurnäkki, Stella Rovio, Uula Hyväkkö, Arno Parviainen, Ilkka Kilpeläinen, U. Liimatainen, Alistair W. T. King, Tiina Liitiä, Jussi Helminen

Publikováno v: Parviainen, A, Wahlström, R, Liimatainen, U, Liitiä, T, Rovio, S, Helminen, J K J, Hyväkkö, U, King, A W T, Suurnäkki, A & Kilpeläinen, I 2015, ' Sustainability of cellulose dissolution and regeneration in 1,5-diazabicyclo[4.3.0]non-5-enium acetate: a batch simulation of the IONCELL-F process ', RSC Advances, vol. 5, pp. 69728-69737 . https://doi.org/10.1039/C5RA12386K

The recyclability of 1,5-diazabicyclo[4.3.0] non-5-enium acetate ([DBNH][OAc]), as a direct dissolution solvent for cellulose, was evaluated during laboratory scale recycling trials. The main objective was to simulate the conditions of a spinning bat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da27b00fd41d3e3ebfee456a7b4474ae
https://doi.org/10.1039/C5RA12386K

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Effect of hydroxide and sulfite ion concentration in alkaline sulfite anthraquinone (ASA) pulping

Autor: Markus Paananen, Herbert Sixta, Stella Rovio, Tiina Liitiä

Publikováno v: Paananen, M, Rovio, S, Liitiä, T & Sixta, H 2015, ' Effect of hydroxide and sulfite ion concentration in alkaline sulfite anthraquinone (ASA) pulping : A comparative study ', Holzforschung, vol. 69, no. 6, pp. 661-666 . https://doi.org/10.1515/hf-2014-0303

Pulp and black liquor produced by alkaline sulfite anthraquinone (ASA) process were comprehensively characterized to evaluate the effects of ion concentration on the delignification and polysaccharide preservation. Scots pine wood meal was pulped at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52925e9a0d3afa50592425614dcf9809
https://cris.vtt.fi/en/publications/0f5eb1d8-538a-4898-ba0d-5354d0e264da

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Modeling of alkaline extraction chemistry and kinetics of softwood kraft pulp

Autor: Susanna Kuitunen, Stella Rovio, Ville Tarvo, Ville Alopaeus, Tapani Vuorinen, Tiina Liitiä

Publikováno v: Holzforschung. 68:733-746

A comprehensive model for alkaline extraction (E) of chlorine dioxide delignified (D0) softwood kraft pulp (KP) is presented. The dynamics of the process is modeled by taking into account both irreversible and reversible chemical reactions and gas-li

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75166fbb304b343e1b0fa0700004444b
https://doi.org/10.1515/hf-2013-0225

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Impact of steam explosion on the wheat straw lignin structure studied by solution-state nuclear magnetic resonance and density functional methods

Autor: Stella Rovio, Harri Heikkinen, Jenni Rahikainen, Tarja Tamminen, Hannu Maaheimo, Thomas Elder, Kristiina Kruus

Publikováno v: Heikkinen, H, Elder, T, Maaheimo, H, Rovio, S, Rahikainen, J, Kruus, K & Tamminen, T 2014, ' Impact of steam explosion on the wheat straw lignin structure studied by solution-state nuclear magnetic resonance and density functional methods ', Journal of Agricultural and Food Chemistry, vol. 62, no. 43, pp. 10437-10444 . https://doi.org/10.1021/jf504622j

Chemical changes of lignin induced by the steam explosion (SE) process were elucidated. Wheat straw was studied as the raw material, and lignins were isolated by the enzymatic mild acidolysis lignin (EMAL) procedure before and after the SE treatment

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31d0bb0384b474b9839cb99a951f70ac
https://doi.org/10.1021/jf504622j

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Analysis of mono- and oligosaccharides in ionic liquid containing matrices

Autor: Stella Rovio, Anna Suurnäkki, Ronny Wahlström

Publikováno v: Wahlström, R, Rovio, S & Suurnäkki, A 2013, ' Analysis of mono-and oligosaccharides in ionic liquid containing matrices ', Carbohydrate Research, vol. 373, pp. 42-51 . https://doi.org/10.1016/j.carres.2012.11.006

Ionic liquids (ILs), that is, salts with melting points Trichoderma reesei endoglucanase Cel5A. According to the results, [DMIM]DMP and [EMIM]AcO] showed clear differences in enzyme inactivation.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ea827f05dbde775af4bb127c91bf6a7
https://doi.org/10.1016/j.carres.2012.11.006

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