Co and Ni catalysts loaded on typical well-ordered micro- and mesoporous supports for acetic acid reduction

Onyestyák, György; Novodárszki, Gyula; Wellisch, Ágnes Farkas; Kalló, D.; Thakur, Ashim Jyoti; Deka, Dhanapati

doi:10.1007/s11144-016-1134-2

Cited by 1 publication

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Formation of the majority of gases can be ascribed to the thermal decomposition of acetic acid in the reducing environment. On the other hand, ethane is produced from the complete hydrodeoxygenation of acetic acid, as it has been found previously using different catalysts. , …”

Section: Resultsmentioning

confidence: 83%

“…On the other hand, ethane is produced from the complete hydrodeoxygenation of acetic acid, as it has been found previously using different catalysts. 42,43…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, ethane is produced from the complete hydrodeoxygenation of acetic acid, as it has been found previously using different catalysts. 42,43 Previous catalytic tests with single-component solutions provide substantial information about the reactivity of guaiacol and acetic acid under hydrotreating conditions. However, pyrolysis bio-oil upgrading actually involves a convoluted reaction network resulting from the interactions between molecules with different functional groups, either existing initially or being created in this complex liquid matrix.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Hydrotreating of Guaiacol and Acetic Acid Blends over Ni₂P/ZSM-5 Catalysts: Elucidating Molecular Interactions during Bio-Oil Upgrading

et al. 2019

View full text Add to dashboard Cite

Catalytic hydrodeoxygenation (HDO) is an effective technology for upgrading pyrolysis bio-oils. Although, in the past years, this process has been extensively studied, the relevance of the cross-reactivity between the numerous chemical components of bio-oil has been scarcely explored. However, molecular coupling can be beneficial for improving the bio-oil characteristics. With the aim of gaining a better understanding of these interactions, this work investigates the catalytic hydrodeoxygenation of mixtures of two typical components of pyrolysis bio-oils: guaiacol and acetic acid. The catalytic tests were carried out employing a bifunctional catalyst based on nickel phosphide (Ni2P) deposited over a commercial nanocrystalline ZSM-5 zeolite. The influence of both hydrogen availability and temperature on the activity and product distribution, was evaluated by carrying out reactions under different H2 pressures (40–10 bar) and temperatures (between 260 and 300 °C). Using blends of both substrates, a partial inhibition of guaiacol HDO occurred because of the competence of acetic acid for the catalytic active sites. Nevertheless, positive interactions were also observed, mainly esterification and acylation reactions, which could enhance the bio-oil stability by reducing acidity, lowering the oxygen content, and increasing the chain length of the components. In this respect, formation of acetophenones, which can be further hydrogenated to yield ethyl phenols, is of particular interest for biorefinery applications. Increasing the temperature results in an increment of conversion but a decrease in the yield of fully deoxygenated molecules due to the production of higher proportion of catechol and related products. Additional experiments performed in the absence of hydrogen revealed that esterification reactions are homogeneously self-catalyzed by acetic acid, while acylation processes are mainly catalyzed by the acidic sites of the zeolitic support.

show abstract

Section: Resultsmentioning

confidence: 83%

“…On the other hand, ethane is produced from the complete hydrodeoxygenation of acetic acid, as it has been found previously using different catalysts. 42,43…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Hydrotreating of Guaiacol and Acetic Acid Blends over Ni₂P/ZSM-5 Catalysts: Elucidating Molecular Interactions during Bio-Oil Upgrading

et al. 2019

View full text Add to dashboard Cite

show abstract

Co and Ni catalysts loaded on typical well-ordered micro- and mesoporous supports for acetic acid reduction

Cited by 1 publication

References 13 publications

Hydrotreating of Guaiacol and Acetic Acid Blends over Ni₂P/ZSM-5 Catalysts: Elucidating Molecular Interactions during Bio-Oil Upgrading

Hydrotreating of Guaiacol and Acetic Acid Blends over Ni₂P/ZSM-5 Catalysts: Elucidating Molecular Interactions during Bio-Oil Upgrading

Contact Info

Product

Resources

About

Co and Ni catalysts loaded on typical well-ordered micro- and mesoporous supports for acetic acid reduction

Cited by 1 publication

References 13 publications

Hydrotreating of Guaiacol and Acetic Acid Blends over Ni2P/ZSM-5 Catalysts: Elucidating Molecular Interactions during Bio-Oil Upgrading

Hydrotreating of Guaiacol and Acetic Acid Blends over Ni2P/ZSM-5 Catalysts: Elucidating Molecular Interactions during Bio-Oil Upgrading

Contact Info

Product

Resources

About

Hydrotreating of Guaiacol and Acetic Acid Blends over Ni₂P/ZSM-5 Catalysts: Elucidating Molecular Interactions during Bio-Oil Upgrading

Hydrotreating of Guaiacol and Acetic Acid Blends over Ni₂P/ZSM-5 Catalysts: Elucidating Molecular Interactions during Bio-Oil Upgrading