Studying the thermal conversion of acetone lignin in supercritical butanol in the presence of NiCuMo/SiO2 catalysts
- Авторы: Sharypov V.I.1, Kusnetsov B.N.1,2, Yakovlev V.A.3, Beregovtsova N.G.1, Baryshnikov S.V.1
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Учреждения:
- Institute of Chemistry and Chemical Technology, Siberian Branch
- Siberian Federal University
- Boreskov Institute of Catalysis
- Выпуск: Том 9, № 2 (2017)
- Страницы: 170-179
- Раздел: Biocatalysis
- URL: https://journals.rcsi.science/2070-0504/article/view/202547
- DOI: https://doi.org/10.1134/S2070050417020088
- ID: 202547
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Аннотация
Existing and emerging technologies for the chemical processing of wood are mainly aimed at transforming its cellulose component into target products. In these processes, lignin is produced on a large scale as a waste product, but there are no advanced ways of processing it. This work investigates the effect NiCuМо/SiO2 catalysts have on the thermal transformation of acetone lignin in supercritical butanol at temperatures of 280, 300, and 350°C. The resulting liquid products are studied via gas–liquid chromatography mass spectrometry, and 13С NMR spectroscopy. It is found that butanol undergoes almost no thermochemical conversions at temperatures below 300°C. Catalysts raise its level of conversion to 36–40 wt %. Under the effect of NiCuМо/SiO2 catalysts, the yield of hexane-soluble products of acetone lignin thermal conversion at 300°C increases by a factor of 2.4, while the yield of solid residue falls by approximately a factor of 3.3. Catalysts reduce the relative content of methoxyphenols in hexane-soluble products: the content of syringol in particular falls by a factor of 14. According to 13С NMR spectroscopy, the catalytic transformation of acetone lignin to liquid acetone-soluble products is accompanied by the breaking of β–О–4 chemical bonds between the structural fragments of lignin and a reduction in the content of methoxyl groups, primarily in the syringyl structural units of the resulting products.
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Об авторах
V. Sharypov
Institute of Chemistry and Chemical Technology, Siberian Branch
Автор, ответственный за переписку.
Email: sharypov@icct.ru
Россия, Krasnoyarsk, 660036
B. Kusnetsov
Institute of Chemistry and Chemical Technology, Siberian Branch; Siberian Federal University
Email: sharypov@icct.ru
Россия, Krasnoyarsk, 660036; Krasnoyarsk, 660041
V. Yakovlev
Boreskov Institute of Catalysis
Email: sharypov@icct.ru
Россия, Novosibirsk, 630090
N. Beregovtsova
Institute of Chemistry and Chemical Technology, Siberian Branch
Email: sharypov@icct.ru
Россия, Krasnoyarsk, 660036
S. Baryshnikov
Institute of Chemistry and Chemical Technology, Siberian Branch
Email: sharypov@icct.ru
Россия, Krasnoyarsk, 660036
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