In-situ hydrodeoxygenation of lignin via hydrothermal liquefaction with water splitting metals: Comparison between autocatalytic and non-autocatalytic processes

Wang, Jian; Liu, Zibiao; Li, Jian; Yan, Beibei; Tao, Junyu; Cheng, Zhanjun; Chen, Guanyi

doi:10.1016/j.ijhydene.2021.12.086

Cited by 13 publications

(7 citation statements)

References 48 publications

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“…199 However, the dissolution-formation route was dominant via repolymerization and carbonization to produce phenolic hydrochar and polyaromatic hydrochar. 199 Traditional biogases (i.e., CO 2 , CO, H 2 , CH 4 , and C 2 − C 5 ) 200,201 and VOCs 196 have been identified among gaseous products obtained from HTL of lignin. While conducting HTL with ethanol as a solvent, a high yield of gases such as CO 2 , C 2 H 6 , C 3 H 6 , C 3 H 8 , and C 2 H 4 was produced by decomposition and gasification.…”

Section: Liquid Products Of Lignin Under Htlmentioning

confidence: 99%

“…Traditional biogases (i.e., CO 2 , CO, H 2 , CH 4 , and C 2 –C 5 ) , and VOCs have been identified among gaseous products obtained from HTL of lignin. While conducting HTL with ethanol as a solvent, a high yield of gases such as CO 2 , C 2 H 6 , C 3 H 6 , C 3 H 8 , and C 2 H 4 was produced by decomposition and gasification .…”

Section: Hydrothermal Treatment Of Model Compounds To Chemicals Fuels...mentioning

confidence: 99%

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Hydrothermal Treatment of Biomass Feedstocks for Sustainable Production of Chemicals, Fuels, and Materials: Progress and Perspectives

et al. 2023

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Hydrothermal process is an emerging technology that contributes to sustainable production of biomass-derived chemicals, fuels, and materials. This technology uses hot compressed water to convert various biomass feedstocks including recalcitrant organic compounds in biowastes into desired solid, liquid, and gaseous products. In recent years, considerable progress has been made in the hydrothermal conversion of lignocellulosic as well as nonlignocellulosic biomass to value-added products and bioenergy to fulfill the principles of circular economy. However, it is important to assess hydrothermal processes in terms of their capabilities and limitations from different sustainability aspects so that further advances can be made toward improvement of their technical maturity and commercialization potential. The key aims of this comprehensive review are to (a) explain the inherent properties of biomass feedstocks and physio-chemical characteristics of their bioproducts, (b) elucidate related transformation pathways, (c) clarify the role of hydrothermal process for biomass conversion, (d) evaluate the capability of hydrothermal treatment coupled with other technologies for producing novel chemicals, fuels and materials, (e) explore different sustainability assessments of hydrothermal processes for potential large-scale applications, and (f) offer our perspectives to facilitate the transition from a primarily petro-based to an alternative biobased society in the context of changing climate.

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Section: Liquid Products Of Lignin Under Htlmentioning

confidence: 99%

Section: Hydrothermal Treatment Of Model Compounds To Chemicals Fuels...mentioning

confidence: 99%

Hydrothermal Treatment of Biomass Feedstocks for Sustainable Production of Chemicals, Fuels, and Materials: Progress and Perspectives

et al. 2023

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“…Even though massive studies have focused on lignocellulosic biomass pyrolysis, the biggest challenge is about the high-efficiency conversion of lignin. Lignin accounting for 40% of energy (higher than that of polysaccharides) has been considered as the most promising source for biochemical platform and bioenergy due to its aromatic structure [ 107 , 108 ]. Nowadays, over 90% of lignin is burned with low efficiency, and only 2% of lignin is utilized efficiently due to its complex structure and low reactivity [ 109 , 110 ].…”

Section: Lignocellulosic Biomass 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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“…Additionally, heterogeneous catalysts are noncorrosive and have higher thermal stability 10 . The effects of metal catalysts have been examined in various studies such as References 11–18 and more. Some of these studies are reviewed in Reference 6 for examining the effects of heterogeneous catalysts in the HTL process 6 .…”

Section: Introductionmentioning

confidence: 99%

“…21 The Mg, Al, Zn, and Fe for autocatalytic and nonautocatalytic processes on lignin hydrodeoxygenation (HDO) via HTL show an increase in liquid product yields. 12 Moreover, Lactuca scariola biomass is liquified using a catalytic hydrothermal process and the Zn catalyst is found to be active in polyaromatic and aliphatic compounds formation. 14 As mentioned previously, considering that homogeneous catalysts can be found in process water, which can be harmful to the environment and causes chemical accumulation and recovery from process water is challenging, it is shown that in the presence of heterogeneous metal powders as catalysts, waste process waters can be used to grow microalgae and fungi through the HTL of Ammi visnaga.…”

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confidence: 99%

Hydrothermal liquefaction of Datura stramonium L.: Influence of temperature and heterogeneous catalysts

Genel

2023

Env Prog and Sustain Energy

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In this study, Datura stramonium L. plant was converted into liquid products by hydrothermal liquefaction method with and without catalysts (Al, Zn, and Cu). The reaction temperature was determined as 300, 325, and 350°C, and the waiting time was determined as 30 min. The obtained liquid products were characterized by gas chromatography–mass spectrometry (GC–MS) and elemental analysis methods. Higher light bio‐oil and heavy bio‐oil yields were obtained with Al, Zn, and Cu catalysts compared to experiments without catalysts. The highest light bio‐oil yields were found as 10.24%, 8.87%, and 7.98% for Zn, Cu, and Al catalysts, respectively. In heavy bio‐oil, the highest efficiency was obtained as 26.98% in the presence of Al catalyst. For all experiments, the highest liquid product yield was obtained at 325 C. At the end of the experiments, it was determined that heterogeneous catalysts were effective on product yield and compound types.

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In-situ hydrodeoxygenation of lignin via hydrothermal liquefaction with water splitting metals: Comparison between autocatalytic and non-autocatalytic processes

Cited by 13 publications

References 48 publications

Hydrothermal Treatment of Biomass Feedstocks for Sustainable Production of Chemicals, Fuels, and Materials: Progress and Perspectives

Hydrothermal Treatment of Biomass Feedstocks for Sustainable Production of Chemicals, Fuels, and Materials: Progress and Perspectives

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

Hydrothermal liquefaction of Datura stramonium L.: Influence of temperature and heterogeneous catalysts

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