Optimisation of Acetic Acid Lignofibre Organosolv Process
| Autor: | Kristiina Poppius-Levlin, Terhi Hakala, Marjo Määttänen, Heli Kangas, Tarja Tamminen, Tiina Liitiä, Stella Rovio |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
pseudolignin alkaline extraction lcsh:Biotechnology Organosolv Bioengineering Xylose Furfural Acetic acid chemistry.chemical_compound Hydrolysis lcsh:TP248.13-248.65 lignofibre Lignin Organic chemistry Organosolv process Phosphinic acid Waste Management and Disposal Extraction (chemistry) xylose technology industry and agriculture food and beverages Alkaline extraction Lignofibre furfural phosphinic acid Pseudolignin acetic acid chemistry Yield (chemistry) organosolv process Nuclear chemistry |
| Zdroj: | 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 |
| ISSN: | 1930-2126 |
| Popis: | 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 presence (or absence) of alkaline pre-extraction as the factors. Delignification was enhanced by increased temperature and alkaline pre-extraction. Alkaline extraction also limited xylose hydrolysis, as well as the further degradation of xylose into furfural. Degradation and condensation reactions began to take place between dissolved carbohydrates and lignin at higher temperatures and longer cooking times. Formation of pseudolignin, most likely because of reactions between lignin and furfural, was also observed under the harshest cooking conditions. To avoid these unwanted side-reactions, minimise viscosity losses, and preserve the yield, the LGF process time should be limited to 3 to 4 h at 150 °C. |
| Databáze: | OpenAIRE |
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