Fast pyrolysis product distribution of biopretreated corn stalk by methanogen

Wang, Tipeng; Ye, Xiaoning; Yin, Jun; Jin, Zaixing; Lü, Qiang; Zheng, Zongming; Chen, Dong

doi:10.1016/j.biortech.2014.07.074

Cited by 21 publications

(8 citation statements)

References 15 publications

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“…Results from other biomass materials are also shown in the Supporting Information (Figure S3). Product distributions from the noncatalytic process were similar to those reported for bagasse, 36 bamboo, 44 cornstalk, 45 wheat straw, 34 and rice husk. 46 A large amount of 4-VP (Peak 3) was formed from bagasse, bamboo, corn stalk, and wheat straw during the noncatalytic process, which should be derived from the decarboxylation of p-coumaric acids (the special chemical composition of certain herbaceous biomass) and decomposition of the p-hydroxyphenol subunits of lignin.…”

Section: ■ Results and Discussionsupporting

confidence: 72%

Catalytic Fast Pyrolysis of Bagasse Using Activated Carbon Catalyst to Selectively Produce 4-Ethyl Phenol

Lü

Zhang

et al. 2016

Energy Fuels

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Fast pyrolysis of bagasse catalyzed by activated carbon (AC) at low temperatures offered a new and promising way to produce the valuable 4-ethyl phenol (4-EP) compound in high selectivity. In this study, the technique of pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) was first applied to investigate several factors on the 4-EP production, including biomass type, fast pyrolysis temperature, AC-to-bagasse ratio, and catalytic pattern (in situ or ex situ catalysis). Moreover, fast pyrolysis experiments by using AC catalyst were conducted in a lab-scale setup to quantitatively determine the pyrolytic products. The experimental results indicated that, among these five herbaceous biomass materials, bagasse was the best material to produce 4-vinylphenol (4-VP) from the noncatalytic process and 4-EP from the catalytic fast pyrolysis process, respectively. 4-VP and its precursors could be catalytically hydrogenated into 4-EP with high selectivity under the catalysis of AC catalyst. Both catalytic pyrolysis temperature and AC-to-bagasse ratio affected the 4-EP selectivity significantly, whereas the catalytic pattern had minor effects on the 4-EP production. The highest yield of 4-EP from bagasse in Py-GC/MS experiments was 2.13 wt %, obtained at the pyrolysis temperature of 300 °C and AC-to-bagasse ratio of 4 from the in situ catalytic pattern. Moreover, lab-scale fast pyrolysis of bagasse catalyzed by AC catalyst obtained the maximal 4-EP yield of 2.49 wt %, with the selectivity of 10.71%.

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Section: ■ Results and Discussionsupporting

confidence: 72%

Catalytic Fast Pyrolysis of Bagasse Using Activated Carbon Catalyst to Selectively Produce 4-Ethyl Phenol

Lü

Zhang

et al. 2016

Energy Fuels

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“…Biological treatment (an environmentally friendly method with low energy consumption) of lignin with assistance of fungus or bacterium has been recently reported as an effective pathway to facilitate lignin pyrolysis, including increasing thermal conversion rate and pyrolytic selectivity of lignin to specific products, decreasing pyrolytic temperature and activation energy [ 242 – 244 ]. For example, bio-treated bamboo lignin using white-rot fungi contained lower thermal stability, which can be decomposed into more G-type phenols through fast pyrolysis [ 245 ].…”

Section: Lignin Pyrolysismentioning

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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“…28 Fast pyrolysis of grass biomass (e.g., bagasse, cornstalk, and bamboo) at 250−500 °C was reported to selectively produce 4-vinylphenol (28.6−60.9% selectivity). 29,30 Therefore, lignin structural variation needs to be taken into account from the earliest design stage to address the limitation of the substrates themselves in the subsequent conversion. However, there is a lack of a holistic view on how the structural variability of lignin fundamentally affects its conversion and selective production of aromatic products.…”

Section: ■ Introductionmentioning

confidence: 99%

Fast and Selective Production of Aromatics via Efficient Lignin Depolymerization: Critical Factors and Mechanism Studies

Cao

Gao

Cheng

et al. 2022

ACS Sustainable Chem. Eng.

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Efficient conversion of renewable lignin into valueadded chemicals and biofuel is of great importance for the sustainable development of biorefineries. However, lignin valorization is highly restricted by its structural variation and complexity. In this regard, we have produced a series of lignins extracted from grass, hardwood, and softwood and focused on scrutinizing their structural variability and key characteristics to provide structural insights into fast and selective production of aromatics. As an energy-efficient approach, microwave-assisted hydrothermal liquefaction without introducing an external oxygen was performed to facilitate the base-catalyzed depolymerization of lignin under moderate conditions. The general applicability of this approach was proved on five different lignins. High yields (58.5−78.6%) of low-molecular-weight bio-oil from all lignins were obtained only after 1 min at 220 °C. In particular, a high ratio of cleavable β−O−4 linkage of grass lignin enabled a fast monomer production, while its specific p-coumaric acid moieties allowed a high monomer selectivity to 4-vinylphenol of 66%. A difference in the product distribution was systematically investigated through a comprehensive analysis of lignin characteristics (e.g., interlinkage, S/G/H unit, and molecular weight) and stability studies of main monomeric products. These results revealed the fast degradation of reactive intermediates (aldehydes and S-type products) and how the monomer's stability/reactivity affects the selective production. Alongside reaction parameters, several critical factors governing the lignin conversion were further identified by calculating the Pearson correlation coefficient between lignin characteristics and the conversion efficiency. The lignin structure−property−degradability relationships and reaction mechanisms are expounded and updated to foster efficient lignin utilization.

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Fast pyrolysis product distribution of biopretreated corn stalk by methanogen

Cited by 21 publications

References 15 publications

Catalytic Fast Pyrolysis of Bagasse Using Activated Carbon Catalyst to Selectively Produce 4-Ethyl Phenol

Catalytic Fast Pyrolysis of Bagasse Using Activated Carbon Catalyst to Selectively Produce 4-Ethyl Phenol

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

Fast and Selective Production of Aromatics via Efficient Lignin Depolymerization: Critical Factors and Mechanism Studies

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