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EFFECT OF RAW MATERIAL AND PULPING CONDITIONS ON DISSOLVED KRAFT LIGNIN

EFFECT OF RAW MATERIAL AND PULPING CONDITIONS ON DISSOLVED KRAFT LIGNIN. CHARACTERIZATION OF KRAFT LIGNINS FROM PINE, SPRUCE AND EUCALYPTUS BY ELEMENTAL ANALYSIS AND ANALYTICAL PYROLYSIS Olena Sevastyanova a , Galina Dobele b , Vilhemina Jurkjane b ,

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EFFECT OF RAW MATERIAL AND PULPING CONDITIONS ON DISSOLVED KRAFT LIGNIN

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  1. EFFECT OF RAW MATERIAL AND PULPING CONDITIONS ON DISSOLVED KRAFT LIGNIN CHARACTERIZATION OF KRAFT LIGNINS FROM PINE, SPRUCE AND EUCALYPTUS BY ELEMENTAL ANALYSIS AND ANALYTICAL PYROLYSIS Olena Sevastyanovaa, Galina Dobeleb, VilheminaJurkjaneb, Antonia Svärda, Elisabet Brännvalla

  2. Me • KTH Royal Institute of Technology, School of Chemical Science and Engineering, Department of Fiber and Polymer Technology • Degree in Chemical Science and Engineering • Master in Macromolecular Materials Degree project: Effect of raw material and Kraft cooking conditions on dissolved lignin • Starting PhD at KTH (June 2014); New materials from rapeseed straw Antonia Svärd, KTH

  3. Aim and goal • Aim • To investigate the impact of the raw materials and the cooking parameters on the properties of dissolved lignin • Goal • To understand the relationship between process conditions and the structure and properties of dissolved lignin • Increasing interest to use kraft lignin for: • Chemicals from phenol • Materials • Green energy Antonia Svärd, KTH

  4. Background – Kraft cookingconditions Antonia Svärd, KTH

  5. The lignin samples • Pine Spruce Eucalyptus Antonia Svärd, KTH

  6. COST mission • Elementalanalysis (CHNS) • Composition and purityof lignin samples, carbon and sulfurcontent • Analyticalpyrolysis • Chemical composition of lignin samples, including the amount of sulfur-containing compounds, carbohydrates and lignin (aromatic part) Antonia Svärd, KTH

  7. Composition lignin samples: Py-GC/MS Antonia Svärd, KTH

  8. Lignin compositionwith Py-GC/MS: syrangylguaiayl Antonia Svärd, KTH

  9. Lignin composition: L/C ratio Antonia Svärd, KTH

  10. Lignin composition: Elementalanalysis Antonia Svärd, KTH

  11. Sulphurcontent; Py-GC/MS vs Elementalanalysis Antonia Svärd, KTH

  12. Conclusions • Precipitatesamplesofpine and sprucehad the highestamountof lignin deriviativescompared to eucalyptus • Eucalyptus lignin had the highestsulphurcontent • Different results on the sulphurcontent from analyticalpyrolysis and elementalanalysis Antonia Svärd, KTH

  13. Thankyou! • COST • Galina and Vilhemina at the Latvian State Institute of Wood Chemistry, Lignin Laboratory • Results serves the basis of: • My master thesis • Oral presentation at EWLP, Sevilla in June • Scientific manuscript Antonia Svärd, KTH

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