Tuning amphiphilic properties of Ni/Carbon nanotubes functionalized catalysts and their effect as emulsion stabilizer for biomass-derived furfural upgrading

Herrera, C.; Barrientos, Lorena; Rosenkranz, Andreas; Sepúlveda, Catherine; García-Fierro, José Luis; Laguna‐Bercero, M. A.; Escalona, N.

doi:10.1016/j.fuel.2020.118032

Cited by 25 publications

(20 citation statements)

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“…These results suggest that the metal nanoparticles located inside of the tubes can be reduced more easily than those deposited on the external surface [66,70] since the inner surface is less reactive than the defective external surface. It is important to mention that previous chemical functionalization of CNTs with nitric acid tends to increase the number of surface oxygen groups (defects) [65,73] . Furthermore, the following oxidation step may have partially opened the ends of the nanotubes, which can be a possible explanation of the peak observed at lower reduction temperatures.…”

Section: Resultsmentioning

confidence: 99%

“…It is important to mention that previous chemical functionalization of CNTs with nitric acid tends to increase the number of surface oxygen groups (defects). [65,73] Furthermore, the following oxidation step may have partially opened the ends of the nanotubes, which can be a possible explanation of the peak observed at lower reduction temperatures. This agrees well with results published by Iglesias et al [74] .…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

“…[54,64] Only a few reports in the literature can be found addressing the application of these nanohybrid materials, which make use of cheaper and more abundant element such as Ni regarding the conversion of furfural in emulsion systems. Recently, Herrera et al [65] modified CNT with different acidic treatments to study the effect on the amphiphilic-catalytic properties of Ni/CNTox catalysts for furfural upgrading. They verified that a more severe acid treatment notably increased the hydrophilic character of the solid particles, thus decreasing the catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ni Metal Content on Emulsifying Properties of Ni/CNTox Catalysts for Catalytic Conversion of Furfural in Pickering Emulsions

et al. 2020

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Ni/CNTox catalysts with variable metal content have been prepared to investigate their emulsifying and catalytic properties for the liquid‐phase conversion of furfural. The solid catalysts and emulsions were analyzed by several characterization techniques. The catalytic activity linearly increased with increasing Ni content (up to 10 wt.%) before dropping down again for a Ni content of 15 wt.%. The loss of catalytic activity was attributed to larger emulsion droplets formed by the inhibition of hydrophilic sites. All Ni/CNTox catalysts were highly selective to cyclopentanone as a main product, while several changes regarding secondary products were observed. Ni/CNTox catalysts with a Ni content up to 10 wt.% favor the formation of levulinic acid, while catalysts with a Ni content of 15 wt.% were selective to tetrahydrofurfuryl alcohol. This was attributed to an inhibition of the acid sites thus favoring the catalyst's hydrogenation capacity.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of the Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Ni Metal Content on Emulsifying Properties of Ni/CNTox Catalysts for Catalytic Conversion of Furfural in Pickering Emulsions

et al. 2020

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“…The decomposition of the cell wall, hydrolysis of monosaccharides, and biological fermentation are the three main steps in the conversion of biomass to biofuel. In this process, the Ni/CNT catalysts [6], Ni/Carbon nanotubes functionalized catalysts [7], and 2D Mxene nano-sheets (Ti 3 C 2 T x ) [8] are the possible topic catalysis. Lignocelluloses (cellulose, hemicellulose, and lignin), which constitute the cell wall of plants and its physical structure, influence the process of cell wall decomposition [9,10].…”

Section: Introductionmentioning

confidence: 99%

Rapid Measurement of Cellulose, Hemicellulose, and Lignin Content in Sargassum horneri by Near-Infrared Spectroscopy and Characteristic Variables Selection Methods

Jiang

Omar

et al. 2022

Molecules

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Near-infrared (NIR) spectroscopy and characteristic variables selection methods were used to develop a quick method for the determination of cellulose, hemicellulose, and lignin contents in Sargassum horneri. Calibration models for cellulose, hemicellulose, and lignin in Sargassum horneri were established using partial least square regression methods with full variables (full-PLSR). The PLSR calibration models were established by four characteristic variables selection methods, including interval partial least square (iPLS), competitive adaptive reweighted sampling (CARS), correlation coefficient (CC), and genetic algorithm (GA). The results showed that the performance of the four calibration models, namely iPLS-PLSR, CARS-PLSR, CC-PLSR, and GA-PLSR, was better than the full-PLSR calibration model. The iPLS method was best in the performance of the models. For iPLS-PLSR, the determination coefficient (R2), root mean square error (RMSE), and residual predictive deviation (RPD) of the prediction set were as follows: 0.8955, 0.8232%, and 3.0934 for cellulose, 0.8669, 0.4697%, and 2.7406 for hemicellulose, and 0.7307, 0.7533%, and 1.9272 for lignin, respectively. These findings indicate that the NIR calibration models can be used to predict cellulose, hemicellulose, and lignin contents in Sargassum horneri quickly and accurately.

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“…Furfural and 5-hydroxymethylfurfural are the most important platform chemicals which could be derived from hemicellulose and cellulose via hydrolysis and subsequent dehydration (Mika et al, 2018;Hui et al, 2019;Luo et al, 2019;Chen et al, 2021;Shi et al, 2021). Due to their diverse double bonds, that is, C O and C C, FF and HMF could be further converted into different valuable chemicals (Sharma et al, 2013;Fulajtárova et al, 2015;Sun et al, 2019;Herrera et al, 2020;Zhu et al, 2020). Especially, because of the wide applications of furfuryl alcohol (FFA) and 2,5dihydroxymethylfuran (DHMF) on resins and farm chemicals (Gandini, 1990;Gandini, 2010), the selective conversion of FF/HMF to FFA/DHMF has received much interests.…”

Section: Introductionmentioning

confidence: 99%

Selective Hydrogenation of the Carbonyls in Furfural and 5-Hydroxymethylfurfural Catalyzed by PtNi Alloy Supported on SBA-15 in Aqueous Solution Under Mild Conditions

Gao

Jiang

2021

Front. Chem.

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Valuable furfuryl alcohol (FFA) and 2,5-dihydroxymethylfuran (DHMF) could be produced by selective hydrogenation of biomass-derived furfural (FF) and 5-hydroxymethylfurfural (HMF) with high atom economy. In this study, SBA-15 (a kind of mesoporous silica molecular sieve)-supported low metal loading (3 wt% total metal content) PtNi alloy catalyst (PtNi/SBA-15) was synthesized via two steps, including the generation of PtNi alloy by hydrothermal method, and the immobilization of PtNi alloy on SBA-15. PtNi/SBA-15 has ordered mesoporous structure with high surface area, and high dispersion of the PtNi alloy with the formation of Ptδ−-Niδ+ surface pairs on SBA-15, which benefit hydrogen activation and selective carbonyl hydrogenation. The selective hydrogenation of FF and HMF over PtNi/SBA-15 in water solvent at 303 K with 1.5 MPa H2 within 2 h, could respectively yield 64.6% FFA with 77.0% selectivity, and 68.2% DHMF with 81.9% selectivity. Besides, PtNi/SBA-15 exhibited a satisfactory water resistance and stability after recycling at least five runs.

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Tuning amphiphilic properties of Ni/Carbon nanotubes functionalized catalysts and their effect as emulsion stabilizer for biomass-derived furfural upgrading

Cited by 25 publications

References 60 publications

Effect of Ni Metal Content on Emulsifying Properties of Ni/CNTox Catalysts for Catalytic Conversion of Furfural in Pickering Emulsions

Effect of Ni Metal Content on Emulsifying Properties of Ni/CNTox Catalysts for Catalytic Conversion of Furfural in Pickering Emulsions

Rapid Measurement of Cellulose, Hemicellulose, and Lignin Content in Sargassum horneri by Near-Infrared Spectroscopy and Characteristic Variables Selection Methods

Selective Hydrogenation of the Carbonyls in Furfural and 5-Hydroxymethylfurfural Catalyzed by PtNi Alloy Supported on SBA-15 in Aqueous Solution Under Mild Conditions

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