Understanding the relationship between the structure and depolymerization behavior of lignin

Park, Jae Yong; Riaz, Asim; Insyani, Rizki; Kim, Jaehoon

doi:10.1016/j.fuel.2017.12.079

Cited by 65 publications

(34 citation statements)

References 58 publications

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“…demineralised components. It should be noted that the composition of these natural, polymeric components will vary from source to source ( [30,31]), so that any attempted comparisons may be compromised. In addition, residual mineral matter may be present and significantly modify the devolatilisation process; for example, the xylan used in Ref.…”

Section: Fast/flash Pyrolysis Of Mineral-free Biomassmentioning

confidence: 99%

The catalytic effect of inherent and adsorbed metals on the fast/flash pyrolysis of biomass: A review

Nzihou

Stanmore

Lyczko

et al. 2019

Energy

124

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Relevant literature which deals with the presence of metals during the catalytic pyrolysis of biomass is reviewed. Only those conditions where the metal was in intimate contact with the biomass components are included. Cellulose, hemicellulose and lignin all fuse during the early stages of pyrolytic heating and the dehydration and decomposition processes begin during this transition. Hemicelluloses such as xylan are more labile and difficult to isolate, whereas both cellulose and lignin produce mostly bio-oils when demineralised and flash pyrolysed. The dominant primary products from 'pure' cellulose are anhydrosugars as well as smaller oxygenates. Lignin gives aromatics based on the syringol and guiacol molecules. The alkali and alkaline earth metals are found to curtail the yield of bio-oil and modify product distribution, even in the low concentrations naturally found in biomass. All other metals act to catalyse cross-linking reactions, with the nickel and zinc most studied. The electropositivity of the metal tends to correlate with the extent of catalytic activity. The presence of metals causes little change to the production of gases, but more char is formed at the expense of liquids. If the aim of pyrolysis is bio-oil for fuel, prewashing of biomass to remove metals is beneficial.

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Section: Fast/flash Pyrolysis Of Mineral-free Biomassmentioning

confidence: 99%

The catalytic effect of inherent and adsorbed metals on the fast/flash pyrolysis of biomass: A review

Nzihou

Stanmore

Lyczko

et al. 2019

Energy

124

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“…[19] Six types of lignin samples were obtainedf rom oak and pine wood using three differentd elignification techniques (ethanosolv,f ormasolv,a nd Klason). Park et al investigated the relationship between the lignin depolymerization behavior and its structure.…”

Section: Noncatalytic Deconstruction Of Ligninmentioning

confidence: 99%

“…Park et al investigated the relationship between the lignin depolymerization behavior and its structure. [19] Six types of lignin samples were obtainedf rom oak and pine wood using three differentd elignification techniques (ethanosolv,f ormasolv,a nd Klason). Because oak wood has ah igher content of sinapyl alcohol units, ether linkages in the lignins derived from oak wood were found to be three times higher than that in ligninsd erived from pinewood.…”

Section: Noncatalytic Deconstruction Of Ligninmentioning

confidence: 99%

“…For example, at 300 8C, oak wood derived formasolvl ignin resulted in ab io-oil yield of 86.2 wt %, whereas oak wood derived Klason lignin resulted in a bio-oil yield of 27.9 wt %u nder the same conditions. [19] Severalf actors, such as biomass type, initial hydrogen pressure, solvent to biomass ratio, reaction autogenous pressure, reaction time, temperature, and products recovery procedure, may affect the bio-oil yields significantly. [20] Zeb et al concluded that the high reaction pressure was am ajor factor that affected the bio-oil yields by investigating the effect of solvent to biomass ratio (from two methods, i.e.,f ix the amount of biomass while changing the amount of solvent, or fix the amount of solvent whilec hanging the amounto fb iomass).…”

Section: Noncatalytic Deconstruction Of Ligninmentioning

confidence: 99%

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Ethanol: A Promising Green Solvent for the Deconstruction of Lignocellulose

et al. 2018

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Growing energy demand, environmental impact, energy security issues, and rural economic development have encouraged the development of sustainable renewable fuels. Nonfood lignocellulosic biomass is a suitable source for sustainable energy because the biomass feedstocks are low cost, abundant, and carbon neutral. Recent thermochemical conversion studies are frequently directed at converting biomass into high-quality liquid fuel precursors or chemicals in a single step. Supercritical ethanol has been selected as a promising solvent medium to deconstruct lignocellulosic biomass because ethanol has extraordinary solubility towards lignocellulosic biomass and can be resourced from cellulosic ethanol facilities. This review provides a critical insight into both catalytic and noncatalytic strategies of lignocellulose deconstruction. In this context, the supercritical ethanol deconstruction pathways are thoroughly reviewed; GC-MS, 1D and 2D NMR spectroscopy, and elemental analysis strategies towards liquid biomass deconstruction products are also critically presented. This review aims to provide readers a broad and accurate roadmap of novel biomass to biofuel conversion techniques.

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“…Lignocellulose biomass is considered one of the most promising alternative renewable resources for biofuel production due to its high energy security and abundant availability in nature [1][2][3]. One of the potential lignocellulosic biomass which can be utilized is coconut husk (CCH) waste.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Enzymatic Digestibility of Coconut Husk using Nitrogen-assisted Subcritical Water for Sugar Production

Muharja

Fadhilah

Nurtono

et al. 2019

Bull. Chem. React. Eng. Catal.

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Coconut husk (CCH) as an abundant agricultural waste in Indonesia has the potential to be utilized for sugar production, which is the intermediate product of biofuel. In this study, subcritical water (SCW) assisted by nitrogen (N2) was developed to enhance the enzymatic hydrolysis of CCH. SCW process was optimized by varying the operation condition: the pressure of 60-100 bar, the temperature of 150-190 °C, and the time of 20-60 min. The SCW-treated solid was subsequently hydrolyzed by utilizing a mixture of commercial cellulase and xylanase enzymes. The result shows that the optimum total sugar yield was obtained under the mild condition of SCW treatment, resulting in the sugar of 15.67 % and 10.31 % gained after SCW and enzymatic hydrolysis process, respectively. SEM and FTIR analysis of SCW-treated solid exhibited the deformation of lignin and solubilization of cellulose and hemicellulose, while XRD and TGA revealed an increase of the amount of crystalline part in the solid residue. The use of N2 in SCW treatment combined with enzymatic hydrolysis in this study suggested that the method can be considered economically for biofuel production from CCH waste in commercial scale. Copyright © 2020 BCREC Group. All rights reserved

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Understanding the relationship between the structure and depolymerization behavior of lignin

Cited by 65 publications

References 58 publications

The catalytic effect of inherent and adsorbed metals on the fast/flash pyrolysis of biomass: A review

The catalytic effect of inherent and adsorbed metals on the fast/flash pyrolysis of biomass: A review

Ethanol: A Promising Green Solvent for the Deconstruction of Lignocellulose

Enhancing Enzymatic Digestibility of Coconut Husk using Nitrogen-assisted Subcritical Water for Sugar Production

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