scholarly journals Effect of Carbon Support, Capping Agent Amount, and Pd NPs Size for Bio-Adipic Acid Production from Muconic Acid and Sodium Muconate

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 505
Author(s):  
Sofia Capelli ◽  
Davide Motta ◽  
Claudio Evangelisti ◽  
Nikolaos Dimitratos ◽  
Laura Prati ◽  
...  
Keyword(s):  
Adipic Acid ◽  
Activated Carbons ◽  
Carbon Support ◽  
Pd Nanoparticles ◽  
Protective Agent ◽  
Capping Agent ◽  
Muconic Acid ◽  
Acid Yield ◽  
Substrate Conversion ◽  
Effect Of Support

The effect of support, stabilizing agent, and Pd nanoparticles (NPs) size was studied for sodium muconate and t,t-muconic acid hydrogenation to bio-adipic acid. Three different activated carbons (AC) were used (Norit, KB, and G60) and carbon morphology did not affect the substrate conversion, but it greatly influenced the adipic acid yield. 1% Pd/KB Darco catalyst, which has the highest surface area and Pd surface exposure, and the smallest NPs size displayed the highest activity. Furthermore, the effect of the amount of the protective agent was studied varying metal/protective agent weight ratios in the range of 1/0.00–1/1.20, using KB as the chosen support. For sodium muconate reduction 1% Pd/KB_1.2 catalyst gave the best results in terms of activity (0.73 s−1), conversion, and adipic acid yield (94.8%), while for t,t-muconic acid hydrogenation the best activity result (0.85 s−1) was obtained with 1% Pd/KB_0.0 catalyst. Correlating the results obtained from XPS and TEM analyses with catalytic results, we found that the amount of PVA (polyvinyl alcohol) influences mean Pd NPs size, Pd(0)/Pd(II) ratio, and Pd surface exposure. Pd(0)/Pd(II) ratio and Pd NPs size affected adipic acid yield and activity during sodium muconate hydrogenation, respectively, while adipic acid yield was related by exposed Pd amount during t,t-muconic acid hydrogenation. The synthesized catalysts showed higher activity than commercial 5% Pd/AC.

scholarly journals Alkene hydrogenation activity of enoate reductases for an environmentally benign biosynthesis of adipic acid

2017 ◽  
Vol 8 (2) ◽  
pp. 1406-1413 ◽  
Author(s):  
Jeong Chan Joo ◽  
Anna N. Khusnutdinova ◽  
Robert Flick ◽  
Taeho Kim ◽  
Uwe T. Bornscheuer ◽  
...  
Keyword(s):  
Adipic Acid ◽  
Environmentally Benign ◽  
Muconic Acid ◽  
Hydrogenation Activity ◽  
Alkene Hydrogenation

We demonstrate the first enzymatic hydrogenation of 2-hexenedioic acid and muconic acid to adipic acid using enoate reductases (ERs).

scholarly journals Bio Adipic Acid Production from Sodium Muconate and Muconic Acid: A Comparison of two Systems

ChemCatChem ◽  
2019 ◽  
Vol 11 (13) ◽  
pp. 3075-3084 ◽  
Author(s):  
Sofia Capelli ◽  
Davide Motta ◽  
Claudio Evangelisti ◽  
Nikolaos Dimitratos ◽  
Laura Prati ◽  
...  
Keyword(s):  
Adipic Acid ◽  
Acid Production ◽  
Muconic Acid ◽  
Two Systems

scholarly journals Surface softening in palladium nanoparticles: effects of a capping agent on vibrational properties

Nanoscale ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 5876-5887 ◽  
Author(s):  
Luca Rebuffi ◽  
Binayak Mukherjee ◽  
Stefano Siboni ◽  
Allison P. Young ◽  
Benjamin P. Williams ◽  
...  
Keyword(s):  
Palladium Nanoparticles ◽  
Surface Region ◽  
Pd Nanoparticles ◽  
Vibrational Properties ◽  
Capping Agent ◽  
Static Disorder

The presence of a capping agent (CTAB) on Pd nanoparticles produces a strong static disorder in the surface region.

scholarly journals Niobium-doped titanium dioxide on a functionalized carbon supported palladium catalyst for enhanced ethanol electro-oxidation

RSC Advances ◽  
2017 ◽  
Vol 7 (55) ◽  
pp. 34618-34623 ◽  
Author(s):  
Weichuan Xu ◽  
Litao Yan ◽  
Huiqiang Wang ◽  
Steven Liaw ◽  
Hongmei Luo
Keyword(s):  
Titanium Dioxide ◽  
Palladium Catalyst ◽  
Carbon Support ◽  
Pd Nanoparticles ◽  
Impregnation Method ◽  
Supported Palladium Catalyst ◽  
Niobium Doped ◽  
Electro Oxidation ◽  
Supported Palladium ◽  
Doped Titanium Dioxide

Pd nanoparticles anchored on Nb-doped TiO2 with functionalized carbon support (denoted as Pd/Nb–TiO2–C) is synthesized through a controllable hydrolysis and impregnation method.

Atomic Layer Deposition Preparation of Pd Nanoparticles on a Porous Carbon Support for Alcohol Oxidation

2011 ◽  
Vol 115 (46) ◽  
pp. 23067-23073 ◽  
Author(s):  
Emma Rikkinen ◽  
Annukka Santasalo-Aarnio ◽  
Sanna Airaksinen ◽  
Maryam Borghei ◽  
Ville Viitanen ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Porous Carbon ◽  
Atomic Layer ◽  
Carbon Support ◽  
Alcohol Oxidation ◽  
Pd Nanoparticles ◽  
Layer Deposition

scholarly journals Pd–Au Bimetallic Catalysts for the Hydrogenation of Muconic Acid to Bio-Adipic Acid

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1313
Author(s):  
Sofia Capelli ◽  
Ilaria Barlocco ◽  
Federico Maria Scesa ◽  
Xiaohui Huang ◽  
Di Wang ◽  
...  
Keyword(s):  
Adipic Acid ◽  
Bimetallic Catalysts ◽  
Batch Reactor ◽  
Hydrogenation Reaction ◽  
Molar Ratio ◽  
Muconic Acid ◽  
Bimetallic Nanoparticle ◽  
Heat Treated ◽  
Temperature Heat ◽  
Treated Carbon

The hydrogenation reaction of muconic acid, produced from biomass using fermentative processes, to bio-adipic acid is one of the most appealing green emerging chemical process. This reaction can be promoted by catalysts based on a metal belonging to the platinum group, and the use of a second metal can preserve and increase their activity. Pd–Au bimetallic nanoparticle samples supported on high-temperature, heat-treated carbon nanofibers were prepared using the sol immobilization method, changing the Pd–Au molar ratio. These catalysts were characterized by TEM, STEM, and XPS analysis and tested in a batch reactor pressurized with hydrogen, where muconic acid dissolved in water was converted to adipic acid. The synthesized Pd–Au bimetallic catalysts showed higher activity than monometallic Au and Pd material and better stability during the recycling tests. Moreover, the selectivity toward the mono-unsaturated changed by decreasing the Pd/Au molar ratio: the higher the amount of gold, the higher the selectivity toward the intermediates.

Activated carbons doped with Pd nanoparticles for hydrogen storage

2012 ◽  
Vol 37 (6) ◽  
pp. 5072-5080 ◽  
Author(s):  
W. Zhao ◽  
V. Fierro ◽  
C. Zlotea ◽  
M.T. Izquierdo ◽  
C. Chevalier-César ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Activated Carbons ◽  
Pd Nanoparticles

scholarly journals Synthesis of highly dispersed Pd nanoparticles supported on multi-walled carbon nanotubes and their excellent catalytic performance for oxidation of benzyl alcohol

2015 ◽  
Vol 5 (8) ◽  
pp. 4144-4153 ◽  
Author(s):  
Vijay M. Shinde ◽  
Emmanuel Skupien ◽  
Michiel Makkee
Keyword(s):  
Benzyl Alcohol ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Simple Approach ◽  
Capping Agent ◽  
Oxidation Of Benzyl Alcohol ◽  
Highly Dispersed ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Excellent Catalytic Performance

A simple approach to synthesize highly dispersed Pd nanoparticles on CNTs without a capping agent is presented which exhibits high activity and selectivity for selective oxidation of benzyl alcohol.

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