Bioethanol production from coconut pulp residue using hydrothermal and postalkaline pretreatment

Mariano, Alissandra Pauline B.; Unpaprom, Yuwalee; Ponnusamy, Vinoth Kumar; Ramaraj, Rameshprabu

doi:10.1002/er.5544

Cited by 21 publications

(12 citation statements)

References 57 publications

(130 reference statements)

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“…ED slightly decreased with increasing NaOH concentration above 2%. It is estimated that high concentrations (≥4%) of NaOH cause repolymerization or condensation of lignin, interfering with the accessibility of the enzyme to polysaccharides [46]. Therefore, 2% NaOH is determined as optimum concentration for the pretreatment of S. angulatus.…”

Section: Effect Of Alakaline Pretreatment On Enzymatic Hydrolysis Of Sicyos Angulatusmentioning

confidence: 99%

Improved Glucose Recovery from Sicyos angulatus by NaOH Pretreatment and Application to Bioethanol Production

Lee

Jang

et al. 2021

Processes

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As greenhouse gases and environmental pollution become serious, the demand for alternative energy such as bioethanol has rapidly increased, and a large supply of biomass is required for bioenergy production. Lignocellulosic biomass is the most abundant on the planet and a large part of it, the second-generation biomass, has the advantage of not being a food resource. In this study, Sicyos angulatus, known as an invasive plant (harmful) species, was used as a raw material for bioethanol production. In order to improve enzymatic hydrolysis, S. angulatus was pretreated with different NaOH concentration at 121 °C for 10 min. The optimal NaOH concentration for the pretreatment was determined to be 2% (w/w), and the glucan content (GC) and enzymatic digestibility (ED) were 46.7% and 55.3%, respectively. Through NaOH pretreatment, the GC and ED of S. angulatus were improved by 2.4-fold and 2.5-fold, respectively, compared to the control (untreated S. angulatus). The hydrolysates from S. angulatus were applied to a medium for bioethanol fermentation of Saccharomyces cerevisiae K35. Finally, the maximum ethanol production was found to be 41.3 g based on 1000 g S. angulatus, which was 2.4-fold improved than the control group.

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Section: Effect Of Alakaline Pretreatment On Enzymatic Hydrolysis Of Sicyos Angulatusmentioning

confidence: 99%

Improved Glucose Recovery from Sicyos angulatus by NaOH Pretreatment and Application to Bioethanol Production

Lee

Jang

et al. 2021

Processes

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“…Alcohols are promising CWS components from the point of view of ecology and energy. These combustible liquids are alternative and renewable fuels [37][38][39][40]. Their energy value exceeds that of energy coals.…”

Section: Introductionmentioning

confidence: 99%

Spraying Characteristics of Alcohol‐Coal‐Water Slurries with Low Coal Content

et al. 2022

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The results of spraying characteristics of alcohol‐coal‐water slurries are presented. It has been experimentally proved that the lowest viscosity value of the studied slurries varies from 54 to 329 mPa s. The density value of alcohol‐coal‐water slurries decreases to 1130 kg m−3 when the content of isopropyl alcohol in the fuel composition is 8 wt %. The largest value of jet spraying angle corresponds to alcohol‐coal‐water fuel with an isopropyl alcohol content of 8 wt %. The number of sufficiently large droplets decreases in comparison with a typical two‐component coal‐water fuel. The calorific value of alcohol‐coal‐water slurries rises when the third liquid fuel component is introduced into the composition of coal‐water fuel.

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“…Biomass pretreatment has the purpose of letting cellulose almost intact while removing some H and L content 22 . Although now, there are numerous methods to perform it, among which, each one has its own advantages and drawbacks 23 .…”

Section: Introductionmentioning

confidence: 99%

Valorization of sawdust biomass for biopolymer extraction via green method: Comparison with conventional process

Cárdenas‐Zapata

Palma‐Ramírez

Flores‐Vela

et al. 2022

Intl J of Energy Research

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Summary The valorization of sawdust (SW) biomass by‐product, to extract cellulose through alkali and bleaching processes, including side‐streams to recover hemicellulose and lignin, is performed with the intention of evaluating differences with a proposed green method (GM). The study is developed with the intention of having a process at laboratory scale without leading to the complicated nanoscale processing. This study contemplates a process with scalable characteristics for the future, which contributes to wood processing waste around the world. Particularly, agroindustrial wastes from Durango (SWT1) and Hidalgo (SWT2), local communities of Mexico, were studied. SWT1 and SWT2 samples were processed with ethanol, sodium hydroxide followed by bleaching with sodium chlorite/acetic acid to remove, extractives (E), hemicellulose (H) and lignin (L), respectively. Selected‐SWT2 was processed through a proposed GM using hydrogen peroxide/sodium hydroxide. On the basis of results including Fourier transform infrared spectroscopy, thermogravimetric/differential analysis (TGA/DTG), X‐ray diffraction (XRD), dynamic light scattering, high heating value, scanning electron microscopy techniques and chemical composition, GM was capable of producing a biomass rich in α‐cellulose (58.0%: SWT2‐C), whereas processed SWT1 and SWT2 through conventional method led to a more percentage of H, β‐ and γ‐C mixtures than α‐polymorphous; 41.0% and 51.0%, respectively. This new method could impact of an important manner to the development of biodegradable thermoplastics. The approximation, from deconvolution of TGA/DTA, led to determine adequately the composition of hemicellulose (SWT1‐C: 51.0%, SWT2‐C: 36.0–0.00%), lignin (SWT1‐C: 17.0%, SWT2‐C: 20.0%) and cellulose (SWT1‐C: 32.0%, SWT2‐C: 44.0%). XRD analysis also indicated that samples contain the following percentage of polymorphous cellulose compounds: SWT1‐C (Type II: 71.3%), SWT2‐C (Type I α: 44.6% and II: 41.4%) and SWT2‐C‐GM (Type II: 38.8%), which confirms that the combination of the type of biomass and the applied pretreatment plays a fundamental role for final applications; in this case, it can be appropriate for elastomers and thermoplastic uses. As a final point, the cellulose composition and thermal stability of both sources is comparable with the commonly used raw material for commercial products.

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Bioethanol production from coconut pulp residue using hydrothermal and postalkaline pretreatment

Cited by 21 publications

References 57 publications

Improved Glucose Recovery from Sicyos angulatus by NaOH Pretreatment and Application to Bioethanol Production

Improved Glucose Recovery from Sicyos angulatus by NaOH Pretreatment and Application to Bioethanol Production

Spraying Characteristics of Alcohol‐Coal‐Water Slurries with Low Coal Content

Valorization of sawdust biomass for biopolymer extraction via green method: Comparison with conventional process

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