A kinetic study on the hydrolysis of corncob residues to levulinic acid in the FeCl3–NaCl system

Wang, Chao; Yang, Guihua; Zhang, Xueming; Shao, Lupeng; Lyu, Gaojin; Mao, Jianzhen; Liu, Shijie; Xu, Feng

doi:10.1007/s10570-019-02711-7

Cited by 21 publications

(9 citation statements)

References 27 publications

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“…A 5-HMF (min -1 ) 3.18 9 10 5 8.80 9 10 5 9. 123 (Dussan et al 2013), cellulose (Girisuta et al 2007) and corncob residues (Wang et al 2019), respectively. Notwithstanding, a wide range of E A has been reported in literature (Table 1), which can be attributed, at least in part, to the variety of catalyst systems and solvents being used.…”

Section: Catalytic Depolymerization Of Cellulose (Stage 3) and Kinetic Studymentioning

confidence: 99%

Kinetic insights into the lignocellulosic biomass-based levulinic acid production by a mechanistic model

et al. 2020

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In this work, a mechanistic model was developed to simulate the kinetics of the production of levulinic acid (LA) from sugarcane bagasse (SCB), rice husk (RH) and soybean straw (SS). The production of LA from those agro-industrial wastes followed the methodology of biorefining in three stages. Experimental data from the third stage (catalytic depolymerization of cellulose) obtained under a wide range of operating conditions were used to estimate the parameters of the model. An optimization procedure based on a genetic algorithm was used to determine the optimal parameter values. The prediction of the concentrations of glucose, 5-HMF and LA using the mechanistic model was particularly accurate, as demonstrated by R 2 and RMSE. Thereby, a satisfactory concordance was reached between the high yields of LA of 61.1 mol%, 67.7 mol% and 61.4 mol% calculated by the model, and the experimental yields of 60.5 ± 2.1 mol%, 65.2 ± 2.9 mol% and 61.5 ± 4.0 mol% (under optimum conditions of 190°C, 7.0% w/v of H 2 SO 4 , 75 min) for SCB, RH and SS, respectively. The biorefining of the agro-industrial wastes under optimum operating conditions allowed a satisfactory catalytic depolymerization of cellulose, regardless of the degree of crystallinity. The estimation of yields led to suggesting a strategy from the point of view of process synthesis and design, integrating SCB, RH and SS to supply their off-season and, thus, to ensure the supply of raw materials in the production of LA.

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Section: Catalytic Depolymerization Of Cellulose (Stage 3) and Kinetic Studymentioning

confidence: 99%

Kinetic insights into the lignocellulosic biomass-based levulinic acid production by a mechanistic model

et al. 2020

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“…After diluted acid hydrolysis, the lignin relative contents in xylose residue increased to 23.1 wt%. In addition, the glucan contents in the xylose residue sharply increased to 60.2 wt%, while the xylan contents decreased to 5.1 wt% [15]. The total structural composition of xylose residue was slightly lower than that of the original corncob.…”

Section: Composition Analysis and Associated Carbohydratesmentioning

confidence: 84%

Structural Characterization and Antioxidant Activity of Milled Wood Lignin from Xylose Residue and Corncob

Wang

Lyu

et al. 2019

Polymers

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Xylose residue (XR), after diluted acid treatment of corncob, consists of cellulose and lignin. However, structural changes of XR lignin have not been investigated comprehensively, and this has seriously hindered the efficient utilization of lignin. In this study, corncob milled wood lignin (CC MWL), and xylose residue milled wood lignin (XR MWL) were isolated according to the modified milled wood lignin (MWL) method. The structural features of two lignin fractions were thoroughly investigated via fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), thermogravimetric analysis (TGA) and two dimensional nuclear magnetic resonance (2D NMR) spectroscopy techniques. XR MWL with higher yield and lower bound carbohydrate contents presented more phenolic OH contents than CC MWL due to partial cleavage of β-O-4. Furthermore, the molecular weights of XR MWL were increased, possibly because of condensation of the lignin during the xylose production. A study on antioxidant activity showed that XR lignin had better radical scavenging ability than that of 2,6-Di-tert-butyl-4-methyl-phenol (BHT) and CC MWL. The results suggested that the lignin in xylose residue, showing great antioxidant properties, has potential applications in food additives.

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“…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. Also, Wang et al, [13] adopted the Saeman's models in their kinetic study on the hydrolysis of corncob residues to levulinic acid. And Yuan et al [1] equally applied the models in their kinetics studies on the hydrolysis of hemicellulose.…”

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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A kinetic study on the hydrolysis of corncob residues to levulinic acid in the FeCl3–NaCl system

Cited by 21 publications

References 27 publications

Kinetic insights into the lignocellulosic biomass-based levulinic acid production by a mechanistic model

Kinetic insights into the lignocellulosic biomass-based levulinic acid production by a mechanistic model

Structural Characterization and Antioxidant Activity of Milled Wood Lignin from Xylose Residue and Corncob

Kinetic Study of Acid Hydrolysis of Corn Cob to Xylose

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