Kinetic Study of Acid Hydrolysis of Corncobs to Levulinic Acid

Liang, Chen; Hu, Yangdong; Guo, Lei; Wu, Lianying; Zhang, Weitao

doi:10.15376/biores.12.2.4049-4061

Cited by 16 publications

(6 citation statements)

References 20 publications

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“…19,38 Detailed treatment conditions of the literature were displayed in Table S2. 19,36,38 In order to easily compare the treatment conditions of PL, humins, and AIHC, the same carbon source (xylose) and reaction temperature (150 °C) were employed for T2, T4, and T6. SEM images of solids separated from the T2, T4, and T6 systems were shown in Figure 1.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The treatment conditions of T2 (Table ) were employed to produce PL . Similarly, treatment conditions of T4 and T6 (Table ) were employed to produce humins and AIHC via referring to the literature. , Detailed treatment conditions of the literature were displayed in Table S2. ,, In order to easily compare the treatment conditions of PL, humins, and AIHC, the same carbon source (xylose) and reaction temperature (150 °C) were employed for T2, T4, and T6. SEM images of solids separated from the T2, T4, and T6 systems were shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

New Understandings of the Relationship and Initial Formation Mechanism for Pseudo-lignin, Humins, and Acid-Induced Hydrothermal Carbon

Cheng

Wang

Lin

et al. 2018

J. Agric. Food Chem.

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The generation of pseudo-lignin as byproduct during the lignocellulose acidic pretreatment has been proposed for many years. However, the detailed formation mechanism is still unclear. Moreover, there is a lack of understanding in the initial reaction during the formation of humins (byproducts in furfural production) and acid-induced hydrothermal carbon (carbon material). In this work, the initial formation of these three substances were investigated. We first found the common feature of their formation process was that carbohydrate-hydrolyzed compounds could form black polymers by condensing in acidic media, but the difference was dependent on the reaction degree. Furthermore, the results revealed that oxidation was an accelerator for condensations during producing black polymers because oxidized compounds could enhance the acidity of the reaction system. However, condensations of oxidized compounds were more difficult to proceed. Meanwhile, during the initial stage, the dominating pathway was that furfural condensed with itself and isomerized xylose via aldol-condensation.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

New Understandings of the Relationship and Initial Formation Mechanism for Pseudo-lignin, Humins, and Acid-Induced Hydrothermal Carbon

Cheng

Wang

Lin

et al. 2018

J. Agric. Food Chem.

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“…The reaction under the above conditions could ensure that the cellulose was fully converted. 27 After the reaction, the filter residue was separated and the volume of the filtrate was measured. The same volume of 0.5 mol/L sulfuric acid solution as the hydrolysate adsorbed by the residue was added for washing.…”

Section: Methodsmentioning

confidence: 99%

“…The reaction was maintained at 453.15 K for 50 min, and the vessel impeller speed was set to 400 rpm. The reaction under the above conditions could ensure that the cellulose was fully converted . After the reaction, the filter residue was separated and the volume of the filtrate was measured.…”

Section: Methodsmentioning

confidence: 99%

Study of a New Process for the Preparation of Butyl Levulinate from Cellulose

Wang

et al. 2019

ACS Omega

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Butyl levulinate (BL) is a versatile chemical utilized widely in food and chemical industries, the production of which by using cellulose in biomass resources is of great significance to its sustainable development. Traditional synthesis processes for n -butyl levulinate are confronted with various problems such as high cost of raw materials, difficulty in separating products, etc. In this paper, a novel process for the preparation of BL from cellulose is proposed. The process is composed of five main unit operations including fed-batch hydrolysis, decolorization, extraction, esterification and purification. A 171.63 g/L concentration of the intermediate levulinic acid was obtained at the fifth feeding through the fed-batch hydrolysis process. The resin-activated carbon secondary decolorization method was adopted to remove the soluble humin byproducts with an accumulative decolorization rate of 89%. In the extraction process, the product BL was chosen as the extractant to avoid the introduction of new impurities. After purification, the purity of the final product BL reaches up to 98 wt %. The proposed technique allows for cost-effective and eco-friendly production of BL from biomass resources.

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“…Onyelucheya et al, [4] in their study on acid hydrolysis of cassava peel applied similar models. Liang et al [11] in the effort to study the acid hydrolysis of corncobs to levulinic acid applied the Saeman's models. The models were helpful to da Costa Lopes & Łukasik [12] in their work on separation and recovery of a hemicellulose-derived sugar produced from the hydrolysis of biomass by an acidic ionic liquid.…”

Section: Cellulosementioning

confidence: 99%

Kinetic Study of Acid Hydrolysis of Corn Cob to Xylose

Uzoh¹,

Onyelucheya²,

Obijiaku³

2022

IJASE

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Corn cob is one of the common renewable, cheap and abundant lignocellulosic materials. As a potential source of fermentable sugars, corn cob can be used as a substrate for value added products such as xylitol. This research paper studied the production of xylose from corn cob using phosphoric and nitric acids at 130 0 C, and acid concentrations of 1wt%, 2wt%, 3wt%, 4wt% and 5wt% respectively, and at time intervals of 18mins, 36mins, 54mins, 72mins and 90mins respectively. The substrate was characterized for the proximate constituents and the results show that corn cob has high hemicellulose content. Seaman model and the Two-fraction model were used in studying the kinetics of xylose concentration in the hydrolysates, and the Two-fraction model proved to have a better fit with R 2 equal to 1. A maximum concentration of 11.034mg/ml of xylose was produced when 3wt% H3PO4 was used as catalyst for the hydrolysis and at a time interval of 38mins, with 67% susceptibility to hydrolysis. While for the nitric acid hydrolysis, 10.859mg/ml of xylose was produced as the maximum concentration when 3wt% of HNO3 was used, at a hydrolysis time interval of 6mins, with 52% susceptibility to hydrolysis. In Comparison, the results showed that the nitric acid was a more efficient catalyst for acid hydrolysis of corn cobs.

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Kinetic Study of Acid Hydrolysis of Corncobs to Levulinic Acid

Cited by 16 publications

References 20 publications

New Understandings of the Relationship and Initial Formation Mechanism for Pseudo-lignin, Humins, and Acid-Induced Hydrothermal Carbon

New Understandings of the Relationship and Initial Formation Mechanism for Pseudo-lignin, Humins, and Acid-Induced Hydrothermal Carbon

Study of a New Process for the Preparation of Butyl Levulinate from Cellulose

Kinetic Study of Acid Hydrolysis of Corn Cob to Xylose

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