High selective production of 5-hydroxymethylfurfural from fructose by sulfonic acid functionalized SBA-15 catalyst

Wang, Lei; Zhang, Libo; Li, Hongyi; Ma, Yubo; Zhang, Ronghui

doi:10.1016/j.compositesb.2018.08.044

Cited by 87 publications

(74 citation statements)

References 65 publications

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“…3400 and 960 cm −1 were assigned to the surface -OH stretching mode and the Si-OH bending vibration, supporting the aforementioned view [26]. Otherwise, the existence of propyl groups was confirmed by the bands at about 2930 and 2854 cm −1 in curve (b), ascribed to the C-H stretching vibration of methylene [33]. The peaks at ca.…”

Section: Catalyst Characterizationsupporting

confidence: 64%

“…The meso-Pr-SO 3 H-SBA-15 was synthesized as reported in the previous literature [33]. Typically, a mixture of SBA-15 (1.0 g) and 3-mercaptopropyltrimethoxysilane (3.0 g) was added into 25 mL of anhydrous toluene, and then the suspension was refluxed under N 2 flow for 30 h. After filtration and thorough washing with diethyl ether, the precipitate was Soxhlet-extracted in a dichloromethane-diethyl ether (1:1, volume ratio) mixture for 10 h and dried in a vacuum oven at 80 • C for 12 h. Subsequently, the obtained solid was oxidized with 30 mL of aqueous H 2 O 2 (30 wt%) at 20 • C for 24 h and further acidified with 80 mL of 0.5 M H 2 SO 4 .…”

Section: Catalyst Preparationmentioning

confidence: 99%

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Efficient Production of Medium-Chain Structured Phospholipids over Mesoporous Organosulfonic Acid-Functionalized SBA-15 Catalysts

et al. 2019

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It is highly desirable that efficient recoverable heterogeneous catalysts should be developed to replace the costly biocatalysts used in producing structured phospholipids (SPLs) with medium-chain fatty acids (MCFAs). Thus, mesoporous propyl and phenyl sulfonic acid-functionalized SBA-15 materials synthesized via surface modification methods were investigated for the soybean lecithin interesterification with methyl caprate or caprylate. The physicochemical properties of the synthesized solid acids were deeply studied by small-angle X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared and pyridine adsorption, etc. to build the possible structure-performance relationships. The results revealed that amounts of organosulfonic acid groups were successfully grafted onto the SBA-15 support, and most of the surface acid sites contained in the as-prepared organic-inorganic hybrid samples were assigned as strong Brönsted acid sites. Notably, the functionalized SBA-15 materials exhibited promising catalytic behaviors in producing MCFA-enriched SPLs under mild conditions (40 • C, 6 h) when compared with commercial Amberlyst-15 and typical phospholipases or lipases, mostly due to their high surface area, ordered structure and adequate Brönsted acid sites. Besides, the as-prepared materials could be easily recycled five times without obvious deactivation. This work might shed light on alternative catalysts for SPL production instead of the costly enzymes.

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Section: Catalyst Characterizationsupporting

confidence: 64%

Section: Catalyst Preparationmentioning

confidence: 99%

Efficient Production of Medium-Chain Structured Phospholipids over Mesoporous Organosulfonic Acid-Functionalized SBA-15 Catalysts

et al. 2019

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“…HMF can be produced from glucose and fructose through acid catalysts [7]. In the past decade, HMF synthesis from fructose has been studied widely, and as high as 90% HMF yields have been readily achieved [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Glucose is the most abundant and cheap C6 sugar, so the syntheses of HMF from glucose is more attractive.…”

Section: Introductionmentioning

confidence: 99%

Selective Dehydration of Glucose into 5-Hydroxymethylfurfural by Ionic Liquid-ZrOCl2 in Isopropanol

Wang

et al. 2018

Catalysts

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In this work, a heterogeneous catalytic system consisting of [HO2CMMIm]Cl and ZrOCl2 in isopropanol is demonstrated to be effective for 5-hydroxymethylfurfural (HMF) synthesis with glucose as the feedstock. Various reaction conditions for HMF synthesis by glucose dehydration were investigated systematically. Under optimized reaction conditions, as high as 43 mol% HMF yield could be achieved. Increasing the water content to a level below 3.17% led to the production of HMF with a higher yield, while a lower HMF yield was observed when the water content was increased above 3.17%. In addition, the data also showed that ZrOCl2 could not only effectively convert glucose into intermediate species (which were not fructose, in contrast to the literature) but also catalyze the intermediate species’ in situ dehydration into HMF. [HO2CMMIm]Cl was used to catalyze the intermediate species’ in situ conversion to HMF. The kinetics data showed that a temperature increase accelerated the intermediate species’ dehydration reaction rate. The reaction of glucose dehydration was a strong endothermal reaction.

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“…(2) e driving information search, processing and decision-making task characteristics affect the driver's mental load in three aspects: information presentation, release method, and driving environment. Based on published way information, such as color, text, symbols, and different driving environments such as weather, traffic conditions, and the outside environment, research scholars have conducted research on driver's mental load in various aspects [39]. Because di erent information sources have di erences in information release features and driver information schemas, the task complexity about information search and processing is di erent.…”

Section: Factors Affecting Driver's Mental Loadmentioning

confidence: 99%

Physiological Characteristics and Nonparametric Test for Master-Slave Driving Task’s Mental Workload Evaluation in Mountain Area Highway at Night

Wang

Liu

Feng

2019

Journal of Advanced Transportation

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With the rapid development of advanced mobile intelligent terminals, driving tasks are diverse, and new tra c safety problems occur. We propose a new research on physiological characteristics and nonparametric tests for the master-slave driving task, especially for evaluation of drivers' mental workload in mountain area highway in nighttime scenario. First, we establish the experimental platform based driving simulator and design the master-slave driving task. Second, based on the physiological data and subjective evaluation for mental workload, we use statistical methods to composite the physical changes evolution analysis in a driving simulator. Finally, we nished nonparametric test of the drivers' psychological load and road test. e results show that in compassion with the daytime scenario, drivers should pay much e ort to driving skills and risk identi cation in the nighttime scenario. us, in the same driving condition, drivers should bear the higher level of mental workload, and it has been subjected to even greater pressures and intensity of emotions.

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High selective production of 5-hydroxymethylfurfural from fructose by sulfonic acid functionalized SBA-15 catalyst

Cited by 87 publications

References 65 publications

Efficient Production of Medium-Chain Structured Phospholipids over Mesoporous Organosulfonic Acid-Functionalized SBA-15 Catalysts

Efficient Production of Medium-Chain Structured Phospholipids over Mesoporous Organosulfonic Acid-Functionalized SBA-15 Catalysts

Selective Dehydration of Glucose into 5-Hydroxymethylfurfural by Ionic Liquid-ZrOCl2 in Isopropanol

Physiological Characteristics and Nonparametric Test for Master-Slave Driving Task’s Mental Workload Evaluation in Mountain Area Highway at Night

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