Dilute sulfuric acid hydrolysis of red macroalgae Eucheuma denticulatum with microwave-assisted heating for biochar production and sugar recovery

Teh, Yong Yi; Lee, Keat Teong; Chen, Wei‐Hsin; Lin, Shih Cheng; Sheen, Herng Kuang; Tan, Inn Shi

doi:10.1016/j.biortech.2017.07.101

Cited by 59 publications

(18 citation statements)

References 34 publications

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“…However, the catalyst dosage must be carefully controlled as high acid concentrations may lead to the species and increasing the amounts of inhibitors in the hydrolysate. 33,82 The effect of the type and acid concentration on the MA-HTT of biomass to produce fermentable species has been carefully discussed in the literature. Yuan et al 141 found that the monosaccharides yield initially increased with augmenting the acid concentration (0.01−0.4 M H 2 SO 4 ).…”

Section: Catalystmentioning

confidence: 99%

Microwave-assisted hydrothermal treatments for biomass valorisation: a critical review

2021

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Section: Catalystmentioning

confidence: 99%

Microwave-assisted hydrothermal treatments for biomass valorisation: a critical review

2021

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“…Teh et al [40] designed a process based on dilute sulfuric acid hydrolysis at 160 °C during 10 min with microwave-assisted heating to produce biochar and sugars from Eucheuma denticulatum . Compared to the raw macroalga, biochar qualities were improved with increased carbon content and lower ash and moisture contents.…”

Section: Biorefinery Strategiesmentioning

confidence: 99%

Successful Approaches for a Red Seaweed Biorefinery

et al. 2019

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Macroalgae have been commercially exploited as food and for the production of phycocolloids, but they also contain compounds with potential in pharmaceutical, nutraceutical, cosmetic, chemical and energetic applications. The biorefinery concept applied to seaweed facilitates the extraction of different constituents ensuring full utilization of resources and generating few residues through a succession of steps. Seaweed biorefineries are less advanced than those based on terrestrial biomass and the design of efficient processes requires further study. This review presents practical successful examples to obtain two or more commercially valuable components from red seaweeds. The selected processes consist on cascading stages of both conventional and alternative techniques to illustrate different possible valorization strategies.

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“…However, the yield of furfural was lower in the hydrothermal reactor, which might be due to the inability to stir during the reaction, so further affecting the mass transfer and heat transfer. In recent years, microwave technology had made many major achievements in the field of catalytic biomass conversion ( Moodley and Kana, 2017 ; Teh et al, 2017 ). Some researchers have used microwaves to assist the conversion of fructose into 5-hydroxymethyl furfural, which has also achieved good results ( Zhu et al, 2016 ; Shao et al, 2021 ).…”

Section: Resultsmentioning

confidence: 99%

Preparation of Furfural From Xylose Catalyzed by Diimidazole Hexafluorophosphate in Microwave

et al. 2021

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In this work, functionalized alkyl imidazolium hexafluorophosphate ILs were synthesized and characterized; then, they were applied in the conversion of xylose to furfural under the microwave method. The results showed that when CnMF was used as a catalyst, an acidic environment was provided to promote the formation of furfural. In addition, the heating method, the solvent, and the different structures of cations in the ionic liquid influenced their catalytic activity. In an aqueous solution, the yield of furfural obtained using the microwave method was better than that of the conventional heating method, and the catalytic activity of diimidazole hexafluorophosphate was better than that of monoimidazole. Meanwhile, for the diimidazole hexafluorophosphate, the change of the carbon chain length between the imidazole rings also slightly influenced the yield. Finally, the optimal yield of 49.76% was obtained at 205°C for 8 min using 3,3′-methylenebis(1-methyl-1H-imidazol-3-ium), C1MF, as a catalyst. Mechanistic studies suggested that the catalytic activity of C1MF was mainly due to the combined effect of POFn (OH)3-n and imidazole ring. Without a doubt, the catalytic activity of C1MF was still available after five cycles, which not only showed its excellent catalytic activity in catalyzing the xylose to prepare the biomass platform compound furfural but also could promote the application of functionalized ionic liquids.

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Dilute sulfuric acid hydrolysis of red macroalgae Eucheuma denticulatum with microwave-assisted heating for biochar production and sugar recovery

Cited by 59 publications

References 34 publications

Microwave-assisted hydrothermal treatments for biomass valorisation: a critical review

Microwave-assisted hydrothermal treatments for biomass valorisation: a critical review

Successful Approaches for a Red Seaweed Biorefinery

Preparation of Furfural From Xylose Catalyzed by Diimidazole Hexafluorophosphate in Microwave

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