Aqueous-Phase Hydrogenation of Levulinic Acid Using Formic Acid as a Sustainable Reducing Agent Over Pt Catalysts Supported on Mesoporous Zirconia

2019 ◽  
Vol 8 (1) ◽  
pp. 393-402 ◽  
Author(s):  
M. Al-Naji ◽  
M. Popova ◽  
Z. Chen ◽  
N. Wilde ◽  
R. Gläser
Keyword(s):  
Formic Acid ◽  
Aqueous Phase ◽  
Levulinic Acid ◽  
Reducing Agent ◽  
Pt Catalysts ◽  
Mesoporous Zirconia

scholarly journals Improving the hydrothermal stability of zeolite Y by La3+ cation exchange as a catalyst for the aqueous-phase hydrogenation of levulinic acid

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5568-5579
Author(s):  
Hue-Tong Vu ◽  
Michael Goepel ◽  
Roger Gläser
Keyword(s):  
Catalytic Activity ◽  
Formic Acid ◽  
Cation Exchange ◽  
Aqueous Phase ◽  
Levulinic Acid ◽  
Zeolite Y ◽  
Hydrothermal Stability

La3+ cation exchange is shown to improve the hydrothermal stability and catalytic activity of bifunctional zeolite Pt/Y catalysts in the aqueous-phase hydrogenation of levulinic acid (LA) with formic acid (FA) as hydrogen source.

Photochemical and Electrochemical Reduction of Carbon Dioxide Catalyzed by a Polyoxometalate-Organic Photosensitizer Complex

2018 ◽  
Author(s):  
Chandan Dey ◽  
Ronny Neumann
Keyword(s):  
Carbon Dioxide ◽  
Cyclic Voltammetry ◽  
Formic Acid ◽  
Electrochemical Reduction ◽  
Mass Spectroscopy ◽  
Photochemical Reactions ◽  
Reducing Agent ◽  
Covalent Attachment ◽  
Hybrid Complex ◽  
Open Face

<p>A manganese substituted Anderson type polyoxometalate, [MnMo<sub>6</sub>O<sub>24</sub>]<sup>9-</sup>, tethered with an anthracene photosensitizer was prepared and used as catalyst for CO<sub>2</sub> reduction. The polyoxometalate-photosensitizer hybrid complex, obtained by covalent attachment of the sensitizer to only one face of the planar polyoxometalate, was characterized by NMR, IR and mass spectroscopy. Cyclic voltammetry measurements show a catalytic response for the reduction of carbon dioxide, thereby suggesting catalysis at the manganese site on the open face of the polyoxometalate. Controlled potentiometric electrolysis showed the reduction of CO<sub>2</sub> to CO with a TOF of ~15 sec<sup>-1</sup>. Further photochemical reactions showed that the polyoxometalate-anthracene hybrid complex was active for the reduction of CO<sub>2</sub> to yield formic acid and/or CO in varying amounts dependent on the reducing agent used. Control experiments showed that the attachment of the photosensitizer to [MnMo<sub>6</sub>O<sub>24</sub>]<sup>9-</sup> is necessary for photocatalysis.</p><div><br></div>

scholarly journals Immobilization of an Iridium(I)-NHC-Phosphine Catalyst for Hydrogenation Reactions under Batch and Flow Conditions

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 656
Author(s):  
Henrietta Kovács ◽  
Krisztina Orosz ◽  
Gábor Papp ◽  
Ferenc Joó ◽  
Henrietta Horváth
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Heterogeneous Catalyst ◽  
Aqueous Phase ◽  
Levulinic Acid ◽  
Flow Reactor ◽  
High Catalytic Activity ◽  
Flow Conditions ◽  
Hydrogenation Reactions ◽  
Excellent Selectivity

Na2[Ir(cod)(emim)(mtppts)] (1) with high catalytic activity in various organic- and aqueous-phase hydrogenation reactions was immobilized on several types of commercially available ion-exchange supports. The resulting heterogeneous catalyst was investigated in batch reactions and in an H-Cube flow reactor in the hydrogenation of phenylacetylene, diphenylacetylene, 1-hexyne, and benzylideneacetone. Under proper conditions, the catalyst was highly selective in the hydrogenation of alkynes to alkenes, and demonstrated excellent selectivity in C=C over C=O hydrogenation; furthermore, it displayed remarkable stability. Activity of 1 in hydrogenation of levulinic acid to γ-valerolactone was also assessed.

A structure–activity relationship study using DFT analysis of Bronsted–Lewis acidic ionic liquids and synergistic effect of dual acidity in one-pot conversion of glucose to value-added chemicals

2018 ◽  
Vol 42 (2) ◽  
pp. 1423-1430 ◽  
Author(s):  
Firdaus Parveen ◽  
Tanmoy Patra ◽  
Sreedevi Upadhyayula
Keyword(s):  
Ionic Liquids ◽  
Synergistic Effect ◽  
Formic Acid ◽  
Levulinic Acid ◽  
Value Added ◽  
One Pot ◽  
Structure Activity ◽  
Acidic Ionic Liquids ◽  
Commercially Important ◽  
Relationship Study

The catalytic conversion of biomass-derived carbohydrates to value-added chemicals, such as 5-hydroxymethylfurfural, levulinic acid, and formic acid, is a commercially important reaction and requires the use of both Lewis and Bronsted acids.

scholarly journals Adsorption of 5-Hydroxymethylfurfural, Levulinic Acid, Formic Acid, and Glucose Using Polymeric Resins Modified with Different Functional Groups

ACS Omega ◽  
2021 ◽  
Author(s):  
Lei Hu ◽  
Jiayi Zheng ◽  
Qing Li ◽  
Shunhui Tao ◽  
Xiaojie Zheng ◽  
...  
Keyword(s):  
Formic Acid ◽  
Functional Groups ◽  
Levulinic Acid ◽  
Polymeric Resins

Investigation on Formation and Solubility of Formic Acid, Acetic Acid and Levulinic Acid in Insulating Oil Using COSMO-RS

2021 ◽  
pp. 118256
Author(s):  
Enchen Yang ◽  
Hanbo Zheng ◽  
Tao Yang ◽  
Wei Yao ◽  
Zijian Wang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Formic Acid ◽  
Levulinic Acid ◽  
Insulating Oil

Integrated electrocatalytic processing of levulinic acid and formic acid to produce biofuel intermediate valeric acid

2014 ◽  
Vol 16 (3) ◽  
pp. 1305-1315 ◽  
Author(s):  
Yang Qiu ◽  
Le Xin ◽  
David J. Chadderdon ◽  
Ji Qi ◽  
Changhai Liang ◽  
...  
Keyword(s):  
Formic Acid ◽  
Levulinic Acid ◽  
Valeric Acid

Hydrogen?Oxygen Flame as a Radical Source for Aqueous-Phase Reaction: Carboxylation of Propylamine in Aqueous Formic Acid Solution

ChemInform ◽  
2005 ◽  
Vol 36 (15) ◽  
Author(s):  
Shinya Nomoto ◽  
Daisuke Yoshimura ◽  
Masayosi Hagiwara ◽  
Masaki Kozono ◽  
Masanori Terasaki ◽  
...  
Keyword(s):  
Acid Solution ◽  
Formic Acid ◽  
Aqueous Phase ◽  
Phase Reaction ◽  
Formic Acid Solution ◽  
Oxygen Flame ◽  
Aqueous Formic Acid
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