Comparison of Dilute Organic Acid Pretreatment and a Comprehensive Exploration of Citric Acid Pretreatment on Corn Cob

Qiao, Hui; Cui, Jingzhao; Ouyang, Shuiping; Shi, Jinjie; Ouyang, Jia

doi:10.32604/jrm.2019.07735

Cited by 15 publications

(5 citation statements)

References 32 publications

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“…Generally, they are divided into four categories, including physical, chemical, physicochemical and biological methods [4]. However, physical pretreatments are not widely used, given the limited effectiveness [5,6]. In recent studies, microwave and ultrasound are also used in the pretreatment process.…”

Section: Introductionmentioning

confidence: 99%

Comparative Evaluation of Organic Acid Pretreatment of Eucalyptus for Kraft Dissolving Pulp Production

et al. 2020

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Pretreatment is an essential process for the extensive utilization of lignocellulose materials. The effect of four common organic acid pretreatments for Kraft dissolving pulp production was comparatively investigated. It was found that under acidic conditions, hemicellulose can be effectively removed and more reducing sugars can be recovered. During acetic acid pretreatment, lignin that was dissolved in acetic acid could form a lignin-related film which would alleviate cellulose hydrolysis, while other organic acids caused severe cellulose degradation. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffractometry (XRD) were used to characterize the pretreated chips in the process. Lignin droplets were attached to the surface of the treated wood chips according to the SEM results. The FTIR spectrum showed that the lignin peak signal becomes stronger, and the hemicellulose peak signal becomes weaker with acid pretreatment. The XRD spectrum demonstrated that the crystallinity index of the wood chips increased. The acetic acid pretreatment process-assisted Kraft process achieved higher yield (31.66%) and higher α-cellulose (98.28%) than any other organic acid pretreatment. Furthermore, extensive utilization of biomass was evaluated with the acetic acid pretreatment-assisted Kraft process. 43.8% polysaccharide (12.14% reducing sugar and 31.66% dissolving pulp) and 22.24% lignin (0.29% acetic acid lignin and 21.95% sulfate lignin) were recovered during the process. Biomass utilization could reach 66.04%. Acetic acid pretreatment is a promising process for extensive biomass utilization.

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Section: Introductionmentioning

confidence: 99%

Comparative Evaluation of Organic Acid Pretreatment of Eucalyptus for Kraft Dissolving Pulp Production

et al. 2020

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“…Organic acid pretreatment, as an effective alternative to inorganic acid pretreatment, has been demonstrated to have mild conditions, less corrosiveness to equipment, and fewer inhibitory by-products [28]. The overall performances of pretreating corncob with seven organic acids were investigated recently, which indicated that citric acid (CA) pretreatment is a promising method for biomass utilization [29]. Unlike the conventional inorganic acids, mild CAP could prevent excessive destruction of lignocellulose during pretreatment.…”

Section: Chemical Composition Of Reed After Capmentioning

confidence: 99%

Efficient production of fermentable sugars from common reed biomass through hydrothermal and citric acid pretreatment processes

Wang,

You,

Gui

et al. 2024

Preprint

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Producing fermentable sugars from lignocellulosic biomass could provide renewable substrate for biofuel production by microbial fermentation. However, the structure of lignocellulose hinders enzymatic saccharification efficiency to obtain sugars, thus development of efficient pretreatment methods to reduce the biomass recalcitrance is an important issue. In this study, the effects of two typical processes including hydrothermal (HTP) and citric acid pretreatments (CAP) on the enzymatic hydrolysis yield of reed biomass were investigated. The results indicate that a higher glucose yield of 87.1% was achieved using cellulase of 10 FPU/g substrate following HTP conducted at 180 ℃ for 120 min. Subsequently, a yield of 63.4% glucose was realized after enzymatic hydrolysis with cellulase when subjected to reed pretreatment with 6% (w/v) CA at 150 ℃ for 60 min. The enhancement in enzymatic yield to 84.2% was also achieved by adding Tween-80 of 100 mg/g substrate. The mechanism of enhanced enzymatic hydrolysis by HTP and CAP processes was elucidated through physicochemical characterization techniques. Overall, this study offers valuable insights for the production of fermentable sugars from renewable lignocellulose.

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“…Formic acid has also been employed to complete the conversion of carbohydrate and lignin in LDM modification [33,34]. Interestingly, a recent study noted due to their increased pKa; dicarboxylic acid has superior catalytic performance than monocarboxylic acid [35]. As a result, critic acid, a tricarboxylic acid, performed better in modification than the other dicarboxylic acids examined, such as oxalic acid.…”

Section: Organic Acid Modificationmentioning

confidence: 99%

“…As a result, critic acid, a tricarboxylic acid, performed better in modification than the other dicarboxylic acids examined, such as oxalic acid. Organic acids have recently been proposed as possible replacements for inorganic acids in order to prevent product degradation and acquire additional xylan sugars [35]. 93.4% of enzymatic hydrolysis was achieved when corn cob was treated with citric acid at 160℃ for 60 mins.…”

Section: Organic Acid Modificationmentioning

confidence: 99%

Acid modification of lignocellulosic derived material for dye and heavy metals removal: A review

Akindolie

Choi

2022

Environmental Engineering Research

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Researchers have tested Lignocellulose derived material (LDMs) from different sources ranging from agricultural to wood in order to facilitate the adsorption of chemical contaminants, such as heavy metals and dyes from water bodies, to eradicate water contamination. However, different methods have been employed to modify the nature of the LDMs to enable their suitability for contaminants removal. Among all these methods, acid modification of LDMs has gained a lot of attention. This review focused on the use of acid modification LDMs for the removal of anionic and cationic dyes, and heavy metals in water. The characteracerization techniques employed in studying the morphology and functional groups of the LDMs were discussed. The adsorption dynamics and mechanisms of reported studies were extensively summarized. The reported adsorption capacity of unmodified LDMs in the available liturature is in the range of 4.44–156.00 mg/g while for the modified is between 80.05–250.01 mg/g for dye removal. The adsorption capacity of modified LDMs reported was 1.60–18.03 times higher than the unmodified because of additional functional groups such as -SO<sub>3</sub> from sulphuric acid modification. Finally, the future outlook and challenges of this method were pulled together.

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Comparison of Dilute Organic Acid Pretreatment and a Comprehensive Exploration of Citric Acid Pretreatment on Corn Cob

Cited by 15 publications

References 32 publications

Comparative Evaluation of Organic Acid Pretreatment of Eucalyptus for Kraft Dissolving Pulp Production

Comparative Evaluation of Organic Acid Pretreatment of Eucalyptus for Kraft Dissolving Pulp Production

Efficient production of fermentable sugars from common reed biomass through hydrothermal and citric acid pretreatment processes

Acid modification of lignocellulosic derived material for dye and heavy metals removal: A review

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