scholarly journals CNF-Functionalization as Versatile Tool for Tuning Activity in Cellulose-Derived Product Hydrogenation

Molecules ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 316 ◽  
Author(s):  
Andrea Jouve ◽  
Stefano Cattaneo ◽  
Sofia Capelli ◽  
Marta Stucchi ◽  
Claudio Evangelisti ◽  
...  
Keyword(s):  
Beneficial Effect ◽  
Carbon Nanofibers ◽  
Levulinic Acid ◽  
Lower Activity ◽  
Hydroxymethyl Furfural ◽  
Catalysed Reaction ◽  
Versatile Tool ◽  
Effect Of Support

Carbon nanofibers (CNFs) have been functionalized by introducing O, N, and P containing groups in order to investigate the effect of support functionalization in Ru catalysed hydroxymethyl furfural (HMF) and levulinic acid (LA) hydrogenation. In the case of HMF, despite the fact that no effect on selectivity was observed (all the catalysts produced selectively gamma-valerolactone (GVL)), the functionalization strongly affected the activity of the reaction. O-containing and N-containing supports presented a higher activity compared to the bare support. On the contrary, in HMF hydrogenation, functionalization of the support did not have a beneficial effect on the activity of a Ru-catalysed reaction with respect to bare support and only CNFs-O behaved similarly to bare CNFs. In fact, when CNFs-N or CNFs-P were used as the supports, a lower activity was observed, as well as a change in selectivity in which the production of ethers (from the reaction with the solvent) greatly increased.

Characteristics of Solid Super Acid SO42-/TiO2-Al2O3-SnO2 during Conversion of Glucose to Levulinic Acid

2012 ◽  
Vol 550-553 ◽  
pp. 103-106
Author(s):  
Ying Liu ◽  
Lu Lin ◽  
Xiao Yu Sui ◽  
Jun Ping Zhuang ◽  
Chun Sheng Pang
Keyword(s):  
Binding Energy ◽  
Levulinic Acid ◽  
Diffraction Peak ◽  
Catalyst Amount ◽  
Hydroxymethyl Furfural ◽  
Good Catalytic Activity ◽  
Super Acid ◽  
Diffraction Peaks ◽  
Acid Catalyzed ◽  
Hydrolysis Of

The effects of catalyst amount on the yields of levulinic and hydroxymethyl furfural were investigated during conversion of glucose to levulinic acid catalyzed by solid super acid SO42- / TiO2-Al2O3-SnO2. XRD and XPS were used to analyse the characteristics of solid super acid SO42- / TiO2-Al2O3-SnO2 before reaction and after reaction. The results showed that: solid super acid SO42- / TiO2-Al2O3-SnO2exhibited good catalytic activity in the reaction of hydrolysis of glucose to produce levulinic acid. There were three obvious peaks in these XRD spectra. The peaks on 44.6° and 67.1° were the characteristic diffraction peaks of γ-Al2O3. The anatase characteristic diffraction peak was on 37.4°. The catalyst was steady in the process. The binding energy of S 2p was similar to the binding energy of standard S6+ 2p in the S 2p XPS spectrum of solid super acid. O 1s XPS was double-peaked spectrum. The increase of element C was the main reason of inactivation of catalyst.

An integrated effluent free process for the production of 5-hydroxymethyl furfural (HMF), levulinic acid (LA) and KNS-ML from aqueous seaweed extract

2020 ◽  
Vol 490 ◽  
pp. 107953
Author(s):  
Faisal Kholiya ◽  
Meena R. Rathod ◽  
Doddabhimappa R. Gangapur ◽  
S. Adimurthy ◽  
Ramavatar Meena
Keyword(s):  
Levulinic Acid ◽  
Seaweed Extract ◽  
Hydroxymethyl Furfural ◽  
Free Process

scholarly journals Obtaining Protoanemonin through Selective Oxidation of D‐Fructose and 5‐(Hydroxymethyl)furfural in a Self‐catalysed Reaction

2020 ◽  
Vol 9 (12) ◽  
pp. 2184-2190
Author(s):  
José J. Martínez ◽  
Luis A. Páez ◽  
Luisa F. Gutiérrez ◽  
Oscar H. Pardo Cuervo ◽  
Hugo A. Rojas ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Hydroxymethyl Furfural ◽  
Catalysed Reaction

Towards Production of γ-valerolactone via Hydrogenation of Aqueous Levulinic Acid

2015 ◽  
Vol 13 (1) ◽  
pp. 119-127 ◽  
Author(s):  
B.T. Huang ◽  
S. Leveneur ◽  
T. Zamar ◽  
J.P. Mikkola ◽  
B. Taouk
Keyword(s):  
Beneficial Effect ◽  
Heterogeneous Catalyst ◽  
Levulinic Acid ◽  
Hydrogen Pressure ◽  
Batch Reactor ◽  
Operating Conditions ◽  
Catalyst Loading ◽  
Hydrogenation Rate ◽  
Stirring Rate

Abstract Synthesis of GVL (γ-valerolactone) via hydrogenation of aqueous LA (levulinic acid) with H2 over heterogeneous catalyst (Ru/C) was investigated. In the first part, a study of the influence of various operating conditions was conducted including that of temperature (90–180°C), stirring rate (500–1200 rpm), catalyst loading (0.1–2.0 g), hydrogen pressure (0.4–2.8 MPa) and initial LA concentration (0.5–2 M). In the second part, influence of supercritical CO2 (scCO2) on hydrogenation rate and GVL yield were investigated. Hydrogenation of aqueous LA under scCO2 and under N2 atmosphere was carried out in batch reactor at 150°C and was compared with the case when no additional gases were present. The result indicated that the use of scCO2 had no beneficial effect neither in terms of LA conversion nor hydrogenation rate when the amount of hydrogen was relatively low compared to the stoichiometry. This effect was mitigated when more hydrogen was present.

Conversion of Glucose to Levulinic Acid Catalyzed by ZSM-5 Loading SO42-/ ZrO2

2013 ◽  
Vol 291-294 ◽  
pp. 249-252
Author(s):  
Ying Liu ◽  
Lu Lin ◽  
Xiao Yu Sui ◽  
Jun Ping Zhuang ◽  
Chun Sheng Pang
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Levulinic Acid ◽  
Temperature Reaction ◽  
Catalyst Amount ◽  
Hydroxymethyl Furfural ◽  
Ft Ir ◽  
Acid Catalyzed ◽  
Molar Percent ◽  
Hydrolysis Of

Hydrolysis of glucose to produce levulinic acid catalyzed by ZSM-5 loading SO42-/ ZrO2 was studied in this paper. The effects of different factors such as catalyst amount, reaction temperature, reaction time on the yields of levulinic acid and hydroxymethyl furfural were investigated. It was found that the highest yield of levulinic acid was 55.03% (molar percent) under the conditions of catalyst amount 3 g, reaction temperature 180 °C and reaction time 2.5 h. Surface structure of catalyst was analyzed by FT-IR, indicating that crystallinity of catalyst was 0.66.

Maleic acid and aluminum chloride catalyzed conversion of glucose to 5-(hydroxymethyl) furfural and levulinic acid in aqueous media

2016 ◽  
Vol 18 (19) ◽  
pp. 5219-5229 ◽  
Author(s):  
Ximing Zhang ◽  
Priya Murria ◽  
Yuan Jiang ◽  
Weihua Xiao ◽  
Hilkka I. Kenttämaa ◽  
...  
Keyword(s):  
Aluminum Chloride ◽  
Maleic Acid ◽  
Levulinic Acid ◽  
Aqueous Media ◽  
Hydroxymethyl Furfural

Maleic acid (MA) and AlCl3 self-assemble into catalytic complexes (Al–(MA)2–(OH)2(aq)) with improved selectivity for converting glucose to HMF, and levulinic acid.

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