Studying the Thermal Conversion of Acetone Lignin in Supercritical Butanol in the Presence of NiCuMo/SiO2 Catalysts
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Переводная
|
| Журнал |
Catalysis in Industry
ISSN: 2070-0504
, E-ISSN: 2070-0555
|
| Вых. Данные |
Год: 2017,
Том: 9,
Номер: 2,
Страницы: 170-179
Страниц
: 10
DOI:
10.1134/S2070050417020088
|
| Ключевые слова |
13С NMR spectroscopy, acetone lignin, analysis, butanol, catalysts, chromatography mass spectrometry, conversion, liquid products |
| Авторы |
Sharypov V. I.
1
,
Kusnetsov B. N.
1,2
,
Yakovlev V. A.
3
,
Beregovtsova N. G.
1
,
Baryshnikov S. V.
1
|
| Организации |
| 1 |
Institute of Chemistry and Chemical Technology, Siberian BranchRussian Academy of Sciences, Krasnoyarsk
|
| 2 |
Siberian Federal University, 79, Svobodny av, Krasnoyarsk, 660041
|
| 3 |
Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 5, Lavrent'ev prospect, Novosibirsk, 630090
|
|
Информация о финансировании (1)
|
1
|
Российский научный фонд
|
16-13-10326
|
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.