Effect of cellulose–lignin interactions on char structural changes during fast pyrolysis at 100–350 °C

Chua, Yee Wen; Wu, Hongwei; Yu, Yun

doi:10.1016/j.proci.2020.08.014

Cited by 37 publications

(10 citation statements)

References 31 publications

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“…Given the limited knowledge of the characteristic features of chars produced from the co-pyrolysis of cellulose and lignin in Chua et al [75], who utilized a drop-tube/fixed-bed quartz reactor with pulsed feeding at temperatures under 350 • C, it was specifically studied how cellulose, and lignin interacted during fast pyrolysis. These authors were able to better the understanding regarding the fundamental pyrolysis mechanisms of lignocellulosic biomass.…”

Section: Snapshots Of the Single-operated Pyrolysis Methodsmentioning

confidence: 99%

Navigating Pyrolysis Implementation—A Tutorial Review on Consideration Factors and Thermochemical Operating Methods for Biomass Conversion

Rasaq,

Okpala,

Igwegbe

et al. 2024

Materials

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Pyrolysis and related thermal conversion processes have shown increased research momentum in recent decades. Understanding the underlying thermal conversion process principles alongside the associated/exhibited operational challenges that are specific to biomass types is crucial for beginners in this research area. From an extensive literature search, the authors are convinced that a tutorial review that guides beginners particularly towards pyrolysis implementation, from different biomasses to the thermal conversion process and conditions, is scarce. An effective understanding of pre-to-main pyrolysis stages, alongside corresponding standard methodologies, would help beginners discuss anticipated results. To support the existing information, therefore, this review sought to seek how to navigate pyrolysis implementation, specifically considering factors and thermochemical operating methods for biomass conversion, drawing the ideas from: (a) the evolving nature of the thermal conversion process; (b) the potential inter-relatedness between individual components affecting pyrolysis-based research; (c) pre- to post-pyrolysis’ engagement strategies; (d) potential feedstock employed in the thermal conversion processes; (e) the major pre-treatment strategies applied to feedstocks; (f) system performance considerations between pyrolysis reactors; and (g) differentiating between the reactor and operation parameters involved in the thermal conversion processes. Moreover, pre-pyrolysis activity tackles biomass selection/analytical measurements, whereas the main pyrolysis activity tackles treatment methods, reactor types, operating processes, and the eventual product output. Other areas that need beginners’ attention include high-pressure process reactor design strategies and material types that have a greater potential for biomass.

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Section: Snapshots Of the Single-operated Pyrolysis Methodsmentioning

confidence: 99%

Navigating Pyrolysis Implementation—A Tutorial Review on Consideration Factors and Thermochemical Operating Methods for Biomass Conversion

Rasaq,

Okpala,

Igwegbe

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…The change in the signal was mainly due to less water and hydrogen bonding in the treated biomass (Li et al, 2015). The aromatic ring vibrations of C=C (between 1600 and 1545 cm −1 ) changed as temperature increased, which meant the lignin of the biomass was affected (Wen et al, 2020). There was no lignin destruction, as no signal is associated with a single compound as guaiacyl, but the intensity of the signal at 1545 cm −1 increases.…”

Section: Discussionmentioning

confidence: 99%

Integrated sustainable process for polyhydroxyalkanoates production from lignocellulosic waste by purple phototrophic bacteria

et al. 2021

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Purple phototrophic bacteria (PPB) showed an enormous potential for polyhydroxyalkanoates (PHA) production using the hydrolysate from lignocellulosic waste as feedstock. Thermal hydrolysis pretreatment was carried out at three different temperatures (120, 150, and 180°C) aiming to improve the biodegradability of the lignocellulosic waste. After this pretreatment, two streams are collected: a solid and a liquid fraction. The anaerobic digestion process of the pretreated solid fraction at 180°C increased its biodegradability extent by 31% compared to the untreated biomass, yielding 210 ± 10 L CH4 kg−1 VS even when the liquid fraction was removed. On the photoheterotrophic of the liquid fraction, PPB were able to remove up to 55% of COD during batch operation, showing peaks of PHA production yield up to 21 wt.%. The treatment of the liquid fraction obtained at high temperatures (T ˃ 120°C) reduces biomass growth and COD consumption efficiency, and thus potential productivity, with no effect over the specific activity and the biomass yield, indicating growth limitation by lack of nutrients (N and P). A preliminary economical assessment indicates suitable economic viability based on an energetic autarchy process. This study pioneered a PPB‐based biorefinery for PHA production from lignocellulosic residues and aligned within the bioeconomy strategy of the European Union.

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“…Typically, hydrogen radicals produced from the thermal degradation of hydrogen donors were beneficial for lignin oils and char upgrading via hydrocracking, hydrogenolysis, dehydration, oligomerization, and polymerization [ 64 ]. On the other hand, some studies also focused on the enhancement of oil production and char evolution via co-pyrolysis, such as lignin–collagen [ 331 ], lignin–cellulose [ 123 , 124 ], lignin–waste oil [ 61 ], lignin–oil shale [ 332 ], lignin/cellulose/sawdust-coke bottle [ 333 ], and lignin–coal [ 334 , 335 ], of which the detailed information is listed in Table 6 . Through co-pyrolysis, not only lignin but also other kinds of wastes with low-efficient utilization can achieve their valorizations.…”

Section: Co-pyrolysis With Other Hydrogen-rich Feedstockmentioning

confidence: 99%

A review on lignin pyrolysis: pyrolytic behavior, mechanism, and relevant upgrading for improving process efficiency

2022

Biotechnol Biofuels

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Lignin is a promising alternative to traditional fossil resources for producing biofuels due to its aromaticity and renewability. Pyrolysis is an efficient technology to convert lignin to valuable chemicals, which is beneficial for improving lignin valorization. In this review, pyrolytic behaviors of various lignin were included, as well as the pyrolytic mechanism consisting of initial, primary, and charring stages were also introduced. Several parallel reactions, such as demethoxylation, demethylation, decarboxylation, and decarbonylation of lignin side chains to form light gases, major lignin structure decomposition to generate phenolic compounds, and polymerization of active lignin intermediates to yield char, can be observed through the whole pyrolysis process. Several parameters, such as pyrolytic temperature, time, lignin type, and functional groups (hydroxyl, methoxy), were also investigated to figure out their effects on lignin pyrolysis. On the other hand, zeolite-driven lignin catalytic pyrolysis and lignin co-pyrolysis with other hydrogen-rich co-feedings were also introduced for improving process efficiency to produce more aromatic hydrocarbons (AHs). During the pyrolysis process, phenolic compounds and/or AHs can be produced, showing promising applications in biochemical intermediates and biofuel additives. Finally, some challenges and future perspectives for lignin pyrolysis have been discussed.

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Effect of cellulose–lignin interactions on char structural changes during fast pyrolysis at 100–350 °C

Cited by 37 publications

References 31 publications

Navigating Pyrolysis Implementation—A Tutorial Review on Consideration Factors and Thermochemical Operating Methods for Biomass Conversion

Navigating Pyrolysis Implementation—A Tutorial Review on Consideration Factors and Thermochemical Operating Methods for Biomass Conversion

Integrated sustainable process for polyhydroxyalkanoates production from lignocellulosic waste by purple phototrophic bacteria

A review on lignin pyrolysis: pyrolytic behavior, mechanism, and relevant upgrading for improving process efficiency

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Effect of cellulose–lignin interactions on char structural changes during fast pyrolysis at 100–350 °C

Cited by 37 publications

References 31 publications

Navigating Pyrolysis Implementation—A Tutorial Review on Consideration Factors and Thermochemical Operating Methods for Biomass Conversion

Navigating Pyrolysis Implementation—A Tutorial Review on Consideration Factors and Thermochemical Operating Methods for Biomass Conversion

Integrated sustainable process for polyhydroxyalkanoates production from lignocellulosic waste by purple phototrophic bacteria

A review on lignin pyrolysis: pyrolytic behavior, mechanism, and relevant upgrading for improving process efficiency

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Effect of cellulose–lignin interactions on char structural changes during fast pyrolysis at 100–350 °C