Reductive catalytic fractionation of flax shive over ru/c catalysts | Научно-инновационный портал СФУ

Reductive catalytic fractionation of flax shive over ru/c catalysts

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.3390/catal11010042

Ключевые слова: biomass, flax shive, reductive catalytic fractionation, ru/c catalysts, valorization

Аннотация: Flax shive is the main waste (up to 70 wt %) in the production of flax fiber. It represents the lignified parts of the flax stem mainly in the form of small straws. Complex processing of such wastes is a significant problem due to the heterogeneity of the chemical structure of lignin. This article presents the results of reductive catalytic fractionation (RCF) of flax shive in ethanol and isopropanol at elevated temperatures (225–250◦C) in the presence of a bifunctional catalyst (Ru/C) and molecular hydrogen. This provides solvolytic depolymerization of lignin and hemicelluloses presented in flax shive. Catalytic hydrogenation effectively stabilizes the formed lignin intermediates and prevents repolymerization reactions producing the lignin fraction with a high degree of depolymerization. RCF of flax shive produces solid products with a high cellulose content and liquid products consisting mainly of monophenolic compounds. Furthermore, the effect of different characteristics (the ruthenium content, particle size, and support acidity) of the bifunctional catalysts containing ruthenium nanoparticles supported on mesoporous, graphite-like carbon material Sibunit®-4 on the yield and composition of the products of hydrogenation of flax shive in sub-and super-critical ethanol has been studied. Bifunctional catalysts Ru/C used in the RCF of flax shive increase its conversion from 44 to 56 wt % and the yield of monophenols from 1.1 to 10.2 wt % (based on the weight of lignin in the sample). Using the best Ru/C catalyst containing 3% of Ru on oxidized at 400◦C carbon support, the high degree of delignification (up to 79.0%), cellulose yield (up to 67.2 wt %), and monophenols yield (up to 9.5 wt %) have been obtained. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

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Издание

Журнал: Catalysts

Выпуск журнала: Vol. 11, Is. 1

Номера страниц: 1-17

ISSN журнала: 20734344

Издатель: MDPI AG

Авторы

  • Kazachenko Aleksandr S. (Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk Sci Ctr, Siberian Branch, Akademgorodok 50,Bldg 24, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Dept Analyt & Organ Chem, Pr Svobodny 79, Krasnoyarsk 660041, Russia)
  • Tarabanko Valery E. (Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk Sci Ctr, Siberian Branch, Akademgorodok 50,Bldg 24, Krasnoyarsk 660036, Russia)
  • Miroshnikova Angelina V. (Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk Sci Ctr, Siberian Branch, Akademgorodok 50,Bldg 24, Krasnoyarsk 660036, Russia)
  • Sychev Valentin V. (Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk Sci Ctr, Siberian Branch, Akademgorodok 50,Bldg 24, Krasnoyarsk 660036, Russia)
  • Skripnikov Andrey M. (Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk Sci Ctr, Siberian Branch, Akademgorodok 50,Bldg 24, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Dept Analyt & Organ Chem, Pr Svobodny 79, Krasnoyarsk 660041, Russia)
  • Malyar Yuriy N. (Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk Sci Ctr, Siberian Branch, Akademgorodok 50,Bldg 24, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Dept Analyt & Organ Chem, Pr Svobodny 79, Krasnoyarsk 660041, Russia)
  • Mikhlin Yuriy L. (Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk Sci Ctr, Siberian Branch, Akademgorodok 50,Bldg 24, Krasnoyarsk 660036, Russia)
  • Baryshnikov Sergey V. (Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk Sci Ctr, Siberian Branch, Akademgorodok 50,Bldg 24, Krasnoyarsk 660036, Russia)
  • Taran Oxana P. (Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk Sci Ctr, Siberian Branch, Akademgorodok 50,Bldg 24, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Dept Analyt & Organ Chem, Pr Svobodny 79, Krasnoyarsk 660041, Russia)

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