Flame-made amorphous solid acids with tunable acidity for the aqueous conversion of glucose to levulinic acid

Beh, Gein Khai; Wang, Chang Ting; Kim, Kyungduk; Qu, Jiangtao; Cairney, Julie M.; Ng, Yun Hau; An, Alicia Kyoungjin; Ryoo, Ryong; Urakawa, Atsushi; Teoh, Wey Yang

doi:10.1039/c9gc02567g

Cited by 14 publications

(6 citation statements)

References 46 publications

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“…However, a substantial yield of FA (ca. 6–7 C mol % at 130 °C, 15–20 min) was detected in the EC/H 2 O solvent, possibly inferring the yield of LA in the solvent system as LA and FA are coproduced during the catalytic conversion of biomass and sugars. ,, A schematic presentation of the reaction pathways for acid-catalyzed paper towel conversion in carbonate solvent/H 2 O is illustrated in Figure .…”

Section: Resultsmentioning

confidence: 99%

Efficient Depolymerization of Cellulosic Paper Towel Waste Using Organic Carbonate Solvents

Dutta

Tsang

et al. 2020

ACS Sustainable Chem. Eng.

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Efficient depolymerization of lignocellulosic biomass is a prerequisite for sugar production and its 3 subsequent up-gradation to fuels and chemicals. Organic carbonate solvents, i.e., propylene 4 carbonate (PC), ethylene carbonate (EC), and dimethyl carbonate (DMC), which are low in toxicity and biodegradable, were investigated as 'green' co-solvents (PC/H 2 O, EC/H 2 O, 6 DMC/H 2 O, solvent ratio 1:1) for depolymerization of cellulosic paper towel waste. PC/H 2 O and 7 EC/H 2 O enhanced the depolymerization of paper towel waste and improved the total sugar yield 8 (up to ~25 Cmol%) compared to H 2 O only (up to ~11 Cmol%) at mild reaction conditions (130°C, 9 20 min). The higher performance of PC/H 2 O and EC/H 2 O can be attributed to higher availability 10 of reactive protons in the catalytic system that facilitates efficient acid hydrolysis of recalcitrant 11 cellulosic fibers. Moreover, a substantial build-up of in-vessel pressure by CO 2 release during the 12 microwave-assisted reaction because of decomposition of PC or EC might have accelerated the 13 conversion of paper towel wastes. PC and EC are prospective solvents for lignocellulosic biomass 14 conversion considering their green features and notable catalytic performance, which have a good 15 potential for substituting conventional organic solvents such as dimethylsulfoxide (DMSO) and 16 tetrahydrofuran (THF) that are often considered hazardous in terms of health, safety, and 17 environmental implications.

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Section: Resultsmentioning

confidence: 99%

Efficient Depolymerization of Cellulosic Paper Towel Waste Using Organic Carbonate Solvents

Dutta

Tsang

et al. 2020

ACS Sustainable Chem. Eng.

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“…Among them, SAPO molecular sieves stand out for their ultra-high (hydro)thermal stability, original porosity, tunable acidity, and hydrophilicity. 23,24 Notably, as the most important representative of SAPOs, the small-pore SAPO-34 with 8-membered ring (8-MR) channels and CHA cages exhibits unanticipated catalytic performance in the dehydration of carbohydrates to high-valued platform chemicals. Dhepe et al first disclosed that SAPO-44 (analogue of showed superior catalytic activity compared with conventional aluminosilicate (beta, MOR and USY) and other SAPO catalysts (SAPO-5, SAPO-11, and in the conversion of softwood hemicellulose to furfural reaction, and 63% yield of furfural could be achieved in the toluene/H 2 O biphasic system.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of SAPO-34 nanocrystallites with excellent performance for the dehydration of carbohydrates to 5-hydroxymethylfurfural

Yang

Pang

et al. 2023

Green Chem.

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“…[11] Hydrolysis of cellulose and lignocellulose into LA can be catalyzed by enzymes, [15,16] mineral acids, [17][18][19] Lewis acids, [20] and solid acids. [21][22][23] Enzymatic hydrolysis is an efficient strategy as it takes place under gentle conditions and causes few side reactions. Unfortunately, enzymes are prone to contamination during the reaction and are limited by high costs.…”

Section: Introductionmentioning

confidence: 99%

Sulphonic Acid‐Functionalized Polymeric Ionic Liquids Catalyzed Conversion of Carbohydrates into Levulinic Acid in One‐Pot Reaction

Shi

Liu

et al. 2023

ChemCatChem

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Sulphonic acid‐functionalized polymeric ionic liquids (PILs) were synthesized and applied into catalytic conversion of cellulose into levulinic acid (LA). The structure, thermal stability, and Hammett acidity function (H0) of PILs were characterized and all were more thermostable than those of small‐molecular ionic liquids (IL). At the optimum reaction conditions, the LA yield was maximized to 79.4 % by catalyst [Pim]CH3SO3. More importantly, catalyst [Pim]CH3SO3 performed well in other biomass conversion, such as cellobiose, starch and rice husk. The product LA can be easily extracted by methyl isobutyl ketone from the reaction mixture. The PILs with high catalytic activity were easily recycled with an LA yield up to 68.9 % even after five cycles. These sufficient PILs will offer new approaches for transforming biomass to platform chemicals.

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Flame-made amorphous solid acids with tunable acidity for the aqueous conversion of glucose to levulinic acid

Abstract: Composition-tunable mixed Brønsted/Lewis acids on silica-alumina and silica-alumina-phosphate prepared by the rapid flame spray pyrolysis produce exceptionally high glucose-to-levulinic acid yield, twice that of commercial ZSM-5 and Zeolite X.

Cited by 14 publications

References 46 publications

Efficient Depolymerization of Cellulosic Paper Towel Waste Using Organic Carbonate Solvents

Efficient Depolymerization of Cellulosic Paper Towel Waste Using Organic Carbonate Solvents

Facile synthesis of SAPO-34 nanocrystallites with excellent performance for the dehydration of carbohydrates to 5-hydroxymethylfurfural

Sulphonic Acid‐Functionalized Polymeric Ionic Liquids Catalyzed Conversion of Carbohydrates into Levulinic Acid in One‐Pot Reaction

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