Semi-Batch Hydrotreatment of Lignin-Derived Phenolic Compounds over Raney-Ni with a Continuous Regeneration of the H-Donor Solvent

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F21%3A43922258" target="_blank" >RIV/60461373:22320/21:43922258 - isvavai.cz</a>

Výsledek na webu

<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/cssc.202102099" target="_blank" >https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/cssc.202102099</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/cssc.202102099" target="_blank" >10.1002/cssc.202102099</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Semi-Batch Hydrotreatment of Lignin-Derived Phenolic Compounds over Raney-Ni with a Continuous Regeneration of the H-Donor Solvent

Popis výsledku v původním jazyce

Lignin can be converted into useful precursors of fuels and fine chemicals by thermochemical conversion followed by catalytic hydrogenation using metal catalysts at severe reaction conditions. Thus, mild hydrogenation would significantly improve the sustainability of lignin valorization. Here, hydrogenation of phenols, alkylphenols, and methoxyphenols was achieved at mild reaction conditions (70°C and atmospheric pressure) via H-transfer hydrogenation over Raney Ni catalyst in 2-propanol and2-butanol solvents. The transfer hydrogenation was feasible at the mild conditions, but the complexity of the reactant greatly decreased or even completely suppressed its reactivity. The position of the functional group (o-, m-, p position) had a great effect on the reactivity of phenols. Moreover, 2 butanol enhanced the conversion of phenols in comparison with 2-propanol. When comparing classic hydrogenation with H-transfer hydrogenation in presence of external H2, it was found that external H2 not only regenerated H donor solvent and ensured stable performance but also increased conversion of phenols and alkylphenols. On the other hand, the absence of external H2 boosted the conversion of methoxyphenols. Finally, phenols extracted from a pyrolysis oil aqueous phase were hydrogenated. The conversion of phenols was greatly affected by competitive adsorption of different compounds present in the reaction mixture. External H2 promoted hydrogenation of the complex reaction mixture and prevented condensation of the reactive species in contrast to the H-transfer hydrogenation.

Název v anglickém jazyce

Semi-Batch Hydrotreatment of Lignin-Derived Phenolic Compounds over Raney-Ni with a Continuous Regeneration of the H-Donor Solvent

Popis výsledku anglicky

Lignin can be converted into useful precursors of fuels and fine chemicals by thermochemical conversion followed by catalytic hydrogenation using metal catalysts at severe reaction conditions. Thus, mild hydrogenation would significantly improve the sustainability of lignin valorization. Here, hydrogenation of phenols, alkylphenols, and methoxyphenols was achieved at mild reaction conditions (70°C and atmospheric pressure) via H-transfer hydrogenation over Raney Ni catalyst in 2-propanol and2-butanol solvents. The transfer hydrogenation was feasible at the mild conditions, but the complexity of the reactant greatly decreased or even completely suppressed its reactivity. The position of the functional group (o-, m-, p position) had a great effect on the reactivity of phenols. Moreover, 2 butanol enhanced the conversion of phenols in comparison with 2-propanol. When comparing classic hydrogenation with H-transfer hydrogenation in presence of external H2, it was found that external H2 not only regenerated H donor solvent and ensured stable performance but also increased conversion of phenols and alkylphenols. On the other hand, the absence of external H2 boosted the conversion of methoxyphenols. Finally, phenols extracted from a pyrolysis oil aqueous phase were hydrogenated. The conversion of phenols was greatly affected by competitive adsorption of different compounds present in the reaction mixture. External H2 promoted hydrogenation of the complex reaction mixture and prevented condensation of the reactive species in contrast to the H-transfer hydrogenation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/GC20-28086J" target="_blank" >GC20-28086J: Současná deoxygenace kyselin a fenolů v pyrolýzních olejích z aktivovaných kalů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

ChemSusChem

ISSN

1864-5631

e-ISSN

—

Svazek periodika

15

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

17

Strana od-do

1-17

Kód UT WoS článku

000726781900001

EID výsledku v databázi Scopus

2-s2.0-85120582199