Pyrolysis Degradation of Cellulose over Highly Effective ZnO and ZnO-CuO Nanocatalysts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43922355" target="_blank" >RIV/60461373:22310/21:43922355 - isvavai.cz</a>

Výsledek na webu

<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/slct.202100367" target="_blank" >https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/slct.202100367</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/slct.202100367" target="_blank" >10.1002/slct.202100367</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pyrolysis Degradation of Cellulose over Highly Effective ZnO and ZnO-CuO Nanocatalysts

Popis výsledku v původním jazyce

Pyrolysis of lignocellulosic biomass with the use of appropriative catalysts can lead to the production of high yields of fuels - bio-oils. Here, zinc oxide - copper oxide (ZnO-CuO) nanocatalysts were synthesized by solvothermal synthesis. High-angle annular dark-field imaging scanning transmission electron microscopy (HAADF-STEM), high-resolution transmission electron microscopy (HRTEM), and energy-dispersive X-ray spectroscopy (EDXS) results suggested that ZnO-CuO nanoparticles (D=23 +/- 5 nm) exhibit porous nanostructure. The pyrolytic degradation of cellulose using pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) unit has been studied over ZnO and ZnO-CuO nanocatalysts at the temperature range 400-800 degrees C. The activation energy of ZnO-CuO (67.21 and 70.04 kJ/mol) was lower by 30 kJ/mol from the activation energy of clean ZnO and the calculated rate constants showed that the cellulose pyrolytic reaction is faster using ZnO-CuO catalyst. Nanoporous ZnO-CuO shifted the products maximum towards lower temperatures (&lt;500 degrees C), reduced the content of aldehydes at 400-500 degrees C and enhanced the overall product composition and bio-oil yield. Porous structure of ZnO nanocatalysts had a significant effect on the product selectivity and reaction mechanism of cellulose pyrolysis.

Název v anglickém jazyce

Pyrolysis Degradation of Cellulose over Highly Effective ZnO and ZnO-CuO Nanocatalysts

Popis výsledku anglicky

Pyrolysis of lignocellulosic biomass with the use of appropriative catalysts can lead to the production of high yields of fuels - bio-oils. Here, zinc oxide - copper oxide (ZnO-CuO) nanocatalysts were synthesized by solvothermal synthesis. High-angle annular dark-field imaging scanning transmission electron microscopy (HAADF-STEM), high-resolution transmission electron microscopy (HRTEM), and energy-dispersive X-ray spectroscopy (EDXS) results suggested that ZnO-CuO nanoparticles (D=23 +/- 5 nm) exhibit porous nanostructure. The pyrolytic degradation of cellulose using pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) unit has been studied over ZnO and ZnO-CuO nanocatalysts at the temperature range 400-800 degrees C. The activation energy of ZnO-CuO (67.21 and 70.04 kJ/mol) was lower by 30 kJ/mol from the activation energy of clean ZnO and the calculated rate constants showed that the cellulose pyrolytic reaction is faster using ZnO-CuO catalyst. Nanoporous ZnO-CuO shifted the products maximum towards lower temperatures (&lt;500 degrees C), reduced the content of aldehydes at 400-500 degrees C and enhanced the overall product composition and bio-oil yield. Porous structure of ZnO nanocatalysts had a significant effect on the product selectivity and reaction mechanism of cellulose pyrolysis.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10401 - Organic chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ChemistrySelect

ISSN

2365-6549

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

4256-4264

Kód UT WoS článku

000656879800028

EID výsledku v databázi Scopus

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