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Relevant bibliographies by topics / Lignin hydrothermal liquefaction

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Academic literature on the topic 'Lignin hydrothermal liquefaction'

Author: Grafiati

Published: 4 June 2025

Last updated: 23 June 2025

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Journal articles on the topic "Lignin hydrothermal liquefaction"

1

Schuler, Julia, Ursel Hornung, Andrea Kruse, Nicolaus Dahmen, and Jörg Sauer. "Hydrothermal Liquefaction of Lignin." Journal of Biomaterials and Nanobiotechnology 08, no. 01 (2017): 96–108. http://dx.doi.org/10.4236/jbnb.2017.81007.

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2

Kang, Shimin, Biao Li, Jie Chang, and Juan Fan. "Antioxidant abilities comparison of lignins with their hydrothermal liquefaction products." BioResources 6, no. 1 (2010): 243–52. http://dx.doi.org/10.15376/biores.6.1.243-252.

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Black liquor alkaline lignin and magnesium lignosulfonate were liquefied at 320 oC. The antioxidant abilities of the liquefaction products were compared with the raw materials. Results showed that the total phenol content and unit antioxidant power of both alkaline lignin liquefaction products (ALLP) and magnesium lignosulfonate liquefaction products (MLLP) were improved, and ALLP had a larger increase than MLLP. The influence of reaction time and temperature on oil yield, total phenol content, and antioxidant power of ALLP was evaluated. The total phenol content was found to have certain relationships with the antioxidant abilities. These results explore a new approach for further studies and applications of liquid antioxidant from lignins.

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3

Guo, Shengjun, Jiachen Zuo, Xiao Yang, Hui Wang, Lihua Cheng, and Libo Zhang. "Investigation of Component Interactions During the Hydrothermal Process Using a Mixed-Model Cellulose/Hemicellulose/Lignin/Protein and Real Cotton Stalk." Energies 18, no. 5 (2025): 1290. https://doi.org/10.3390/en18051290.

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Converting agricultural and forestry waste into high-value-added bio-oil via hydrothermal liquefaction (HTL) reduces incineration pollution and alleviates fuel oil shortages. Current research focuses on adjusting HTL parameters like temperature, time, catalyst, and pretreatment. Few studies explore raw material composition and its interactions with bio-oil properties, limiting guidance for future multi-material hydrothermal co-liquefaction. In view of the above problems, the lignocellulosic model in this paper used cellulose, hemicellulose, lignin, and protein as raw materials. At a low hydrothermal temperature (220 °C), the yield and properties of hydrothermal bio-oil were used as indicators to explore the influence of the proportional content of different model components on the interaction in the hydrothermal process through its simple binary blending and multivariate blending. Then, compared with the hydrothermal liquefaction process of cotton stalk, the interaction between components in the hydrothermal process of real lignocellulose was explored. The results demonstrated significant interactions among cellulose, lignin, and hemicellulose in cotton stalks. The relative strength of component interactions was ranked by yield (wt.%) and property modulation as follows: cellulose–lignin (C-L, 6.82%, synergistic enhancement) > cellulose–hemicellulose (C-X, 1.83%, inhibitory effect) > hemicellulose–lignin (X-L, 1.32%, non-significant interaction). Glycine supplementation enhanced bio-oil yields, with the most pronounced effect observed in cellulose–glycine (C-G) systems, where hydrothermal bio-oil yield increased from 2.29% to 4.59%. Aqueous-phase bio-oil exhibited superior high heating values (HHVs), particularly in hemicellulose–glycine (X-G) blends, which achieved the maximum HHV of 29.364 MJ/kg among all groups. Meanwhile, the characterization results of hydrothermal bio-oil under different mixing conditions showed that the proportion of model components largely determined the composition and properties of hydrothermal bio-oil, which can be used as a regulation method for the synthesis of directional chemicals. Cellulose–lignin (C-L) interactions demonstrated the strongest synergistic enhancement, reaching maximum efficacy at a 3:1 mass ratio. This study will deepen the understanding of the composition of lignocellulose raw materials in the hydrothermal process, promote the establishment of a hydrothermal product model of lignocellulose, and improve the yield of bio-oil.

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Briand, Morgane, Geert Haarlemmer, Anne Roubaud, and Pascal Fongarland. "Evaluation of the Heat Produced by the Hydrothermal Liquefaction of Wet Food Processing Residues and Model Compounds." ChemEngineering 6, no. 1 (2022): 2. http://dx.doi.org/10.3390/chemengineering6010002.

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Hydrothermal liquefaction has proven itself as a promising pathway to the valorisation of low-value wet food residues. The chemistry is complex and many questions remain about the underlying mechanism of the transformation. Little is known about the heat of reaction, or even the thermal effects, of the hydrothermal liquefaction of real biomass and its constituents. This paper explores different methods to evaluate the heat released during the liquefaction of blackcurrant pomace and brewers’ spent grains. Some model compounds have also been evaluated, such as lignin, cellulose and glutamic acid. Exothermic behaviour was observed for blackcurrant pomace and brewers’ spent grains. Results obtained in a continuous reactor are similar to those obtained in a batch reactor. The heat release has been estimated between 1 MJ/kg and 3 MJ/kg for blackcurrant pomace and brewers’ spent grains, respectively. Liquefaction of cellulose and glucose also exhibit exothermic behaviour, while the transformation of lignin and glutamic acid present a slightly endothermic behaviour.

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Cao, Yang, Cheng Zhang, Daniel C. W. Tsang, Jiajun Fan, James H. Clark, and Shicheng Zhang. "Hydrothermal Liquefaction of Lignin to Aromatic Chemicals: Impact of Lignin Structure." Industrial & Engineering Chemistry Research 59, no. 39 (2020): 16957–69. http://dx.doi.org/10.1021/acs.iecr.0c01617.

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Kang, S., J. Chang, and J. Fan. "Phenolic Antioxidant Production by Hydrothermal Liquefaction of Lignin." Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 37, no. 5 (2015): 494–500. http://dx.doi.org/10.1080/15567036.2011.585386.

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Ahlbom, Anders, Marco Maschietti, Rudi Nielsen, Merima Hasani, and Hans Theliander. "Towards understanding kraft lignin depolymerisation under hydrothermal conditions." Holzforschung 76, no. 1 (2021): 37–48. http://dx.doi.org/10.1515/hf-2021-0121.

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Abstract Kraft lignin depolymerisation using hydrothermal liquefaction suffers from the formation of char, resulting in a decreased product yield as well as causing operational problems. While this may be mitigated by the addition of capping agents such as phenol and isopropanol, other reaction parameters, for example reaction time and temperature, are also important for the product yields. In this work, the effect of short reaction times on the hydrothermal liquefaction of kraft lignin in an alkaline water and isopropanol mixture was investigated at 1–12 min and 290 °C. The results show that there were swift initial reactions: the major ether bonds in the lignin were broken within the first minute of reaction, and the molecular weight of all product fractions was halved at the very least. Longer reaction times, however, do not cause as pronounced structural changes as the initial reaction, indicating that a recalcitrant carbon-carbon skeleton remained in the products. Nevertheless, the yields of both char and monomers increased slowly with increasing reaction time. The swift initial depolymerising reactions were therefore followed by slower repolymerisation as well as a slow formation of monomers and dimers, which calls for careful tuning of the reaction time.

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Shah, Ayaz Ali, Kamaldeep Sharma, Tahir Hussain Seehar, et al. "Sub-Supercritical Hydrothermal Liquefaction of Lignocellulose and Protein-Containing Biomass." Fuels 5, no. 1 (2024): 75–89. http://dx.doi.org/10.3390/fuels5010005.

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Hydrothermal liquefaction (HTL) is an emerging technology for bio-crude production but faces challenges in determining the optimal temperature for feedstocks depending on the process mode. In this study, three feedstocks—wood, microalgae spirulina (Algae Sp.), and hydrolysis lignin were tested for sub-supercritical HTL at 350 and 400 °C through six batch-scale experiments. An alkali catalyst (K2CO3) was used with wood and hydrolysis lignin, while e (Algae Sp.) was liquefied without catalyst. Further, two experiments were conducted on wood in a Continuous Stirred Tank Reactor (CSTR) at 350 and 400 °C which provided a batch versus continuous comparison. Results showed Algae Sp. had higher bio-crude yields, followed by wood and lignin. The subcritical temperature of 350 °C yielded more biocrude from all feedstocks than the supercritical range. At 400 °C, a significant change occurred in lignin, with the maximum percentage of solids. Additionally, the supercritical state gave higher values for Higher Heating Values (HHVs) and a greater amount of volatile matter in bio-crude. Gas Chromatography and Mass Spectrometry (GCMS) analysis revealed that phenols dominated the composition of bio-crude derived from wood and hydrolysis lignin, whereas Algae Sp. bio-crude exhibited higher percentages of N-heterocycles and amides. The aqueous phase analysis showed a Total Organic Carbon (TOC) range from 7 to 22 g/L, with Algae Sp. displaying a higher Total Nitrogen (TN) content, ranging from 11 to 13 g/L. The pH levels of all samples were consistently within the alkaline range, except for Wood Cont. 350. In a broader perspective, the subcritical temperature range proved to be advantageous for enhancing bio-crude yield, while the supercritical state improved the quality of the bio-crude.

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Jensen, Mads M., Demi T. Djajadi, Cristian Torri, et al. "Hydrothermal Liquefaction of Enzymatic Hydrolysis Lignin: Biomass Pretreatment Severity Affects Lignin Valorization." ACS Sustainable Chemistry & Engineering 6, no. 5 (2018): 5940–49. http://dx.doi.org/10.1021/acssuschemeng.7b04338.

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Phromphithak, Sanphawat, Thossaporn Onsree, Ruetai Saengsuriwong, and Nakorn Tippayawong. "Compositional analysis of bio-oils from hydrothermal liquefaction of tobacco residues using two-dimensional gas chromatography and time-of-flight mass spectrometry." Science Progress 104, no. 4 (2021): 003685042110644. http://dx.doi.org/10.1177/00368504211064486.

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Sustainable energy from biomass is one of the most promising alternative energy sources and is expected to partially replace fossil fuels. Tobacco industries have normally rid their processing residues by landfilling or incineration, affecting the environment negatively. These residues can be used to either extract high-value chemicals or generate bio-energy via hydrothermal liquefaction. The main liquid product or bio-oil consists of highly complicated chemicals. In this work, the bio-oil from hydrothermal liquefaction of tobacco processing residues was generated in a batch reactor at biomass-to-deionized water ratio of 1:3, temperature of 310°C, and 15 min residence time, yielding the maximum liquid products for more than 50% w/w. The liquid products were analyzed, using two-dimensional gas chromatography and time-of-flight mass spectrometry (GC × GC/TOF MS). This technique allowed for a highly efficient detection of numerous compounds. From the results, it was found that hydrothermal liquefaction can cleave biopolymers (cellulose, hemicellulose, and lignin) in tobacco residues successfully. The hydrothermal liquefaction liquid products can be separated into heavy organic, light organic, and aqueous phase fractions. By GC × GC/TOF MS, the biopolymers disintegrated into low molecular weight compounds and classified by their chemical derivatives and functional groups could be detected. The major chemical derivative/functional groups found were cyclic ketones and phenols for heavy organic and light organic, and carboxylic acids and N-containing compounds for the aqueous phase. Additionally, by the major compounds found in this work, simple pathway reactions occurring in the hydrothermal liquefaction reaction were proposed, leading to a better understanding of the hydrothermal liquefaction process for tobacco residues.

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Dissertations / Theses on the topic "Lignin hydrothermal liquefaction"

1

Schuler, Julia [Verfasser], and J. [Akademischer Betreuer] Sauer. "Hydrothermal liquefaction of lignin / Julia Schuler ; Betreuer: J. Sauer." Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/120580756X/34.

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Cronin, Dylan J. "Studies on the hydrothermal liquefaction of lignin to dicarboxylic acids and aromatics." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/118668/1/Dylan_Cronin_Thesis.pdf.

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In the last decades, there has been increasing demand by society for non-toxic renewable products that could be used to replace fossil-based building blocks. Lignin is a major component of nonedible biomass, and is the most abundant renewable source of aromatics in nature. The research work investigated the breakdown of lignin using a novel thermochemical approach. It resulted in the production of organic acids, which can be formulated to produce green pesticides and herbicides. The study also resulted in the production of low molecular weight aromatics, which can be used for the production of bio-based polymers, including biodegradable packaging materials.

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Alam, David. "Decomposition of Lignin Model Compounds Under Catalysed and Non-catalysed Hydrothermal Liquefaction Conditions." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/16178.

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The decomposition of lignin under Hydrothermal Liquefaction (HTL) conditions yields an aqueous product containing valuable aromatic chemicals in addition to solids and gaseous products. This thesis shows the kinetics and reaction pathways of lignin decomposition under HTL conditions using diaryl model compounds representative of the α–O–4 and β–O–4 ether linkages found in lignin. Additionally, aromatic aldehydes with varying degrees of hydroxy and methoxy substitution have been investigated to determine their respective reaction pathways and possible contribution to CO2 formation. A laboratory scale batch reactor with rapid heating and cooling profiles was designed and used to determine accurate reaction kinetic parameters between 140 – 360 °C. The α–O–4 and β–O–4 linkages decomposed via hydrolysis forming products prone to secondary reactions including condensation, alkylation, demethylation and dehydration. The β–O–4 linkage was more stable than the α–O–4 linkage and required higher temperatures to decompose. The overall reactivity of the model compounds and product distribution depends on the number and type of functional groups on the aromatic ring under HTL conditions.

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Besse, Xavier. "Conversion catalytique de composés modèles de biomasse en conditions hydrothermales." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10196/document.

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La liquéfaction de biomasse en conditions hydrothermales est un procédé intéressant pour les ressources contenant naturellement une part importante d'eau. Ce type de procédé a lieu dans des conditions de hautes température et pression (250-370 °C, 50-250 bar). Dans ces circonstances, différentes propriétés physico-chimiques de l'eau sont modifiées permettant notamment de faciliter les réactions de dégradation des polymères structurant la biomasse. Ce travail de thèse a eu pour but l'étude de la réactivité en conditions hydrothermales de différentes molécules modèles représentant divers segments d'une biomasse concrète. L'effet de l'ajout de catalyseurs hétérogènes dans le milieu réactionnel a été étudié. Ces catalyseurs ont été caractérisés avant et après les avoir soumis à des conditions hydrothermales. Le catalyseur Pt/C synthétisé présentant des résultats prometteurs, différentes études cinétiques ont été menées sur les molécules modèles ciblées en présence de ce catalyseur<br>Hydrothermal liquefaction of biomass is a promising process for resources with high water content. This type of process takes place under high temperature and pressure conditions (250-370 °C, 50-250 bar). Under these circumstances, various water physicochemical properties are modified and enable to facilitate degradation reactions of polymers that structure biomass. The aim of this phD work is to investigate the reactivity of biomass model compounds (representative of diverse real biomass segments) in hydrothermal media. The effect of the addition of heterogeneous catalysts in reaction conditions has been studied. These catalysts have previously been characterized before and after an aging in hydrothermal conditions. Synthesized Pt/C catalyst presents promising results and thus various kinetic studies have been conducted with targeted model compounds in the presence of Pt/C

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Dunn, Kameron Gary. "Conversion of sugar cane lignin into aromatic products and fractionation of products for industrial use." Thesis, Queensland University of Technology, 2014.

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Tana. "Characterization and utilization of cellulosic ethanol by-products." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/104978/1/_Tana_Thesis.pdf.

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Bioethanol is an attractive clean and renewable energy source. Lignocellulose biomass, such as sugarcane bagasse or eucalyptus wood is used to produce bioethanol. This project examined the properties of the by-products and investigated the valorisation of the waste. It was demonstrated that aromatic value-added products can be produced from the by-products and waste from ethanol production.

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Barbier, Jérémie Alain. "Relation structure/réactivité en conversion hydrothermale des macromolécules de lignocellulose." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14144/document.

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Ce travail porte sur l'étude des voies réactionnelles accompagnant la liquéfaction desconstituants de la biomasse lignocellulosique dans un milieu aqueux proche du pointcritique. La stratégie expérimentale consiste à étudier la réaction en unité pilote decomposés lignocellulosiques modèles et à développer une approche analytiquemultitechnique originale afin de caractériser les structures et les masses moléculairesdes produits. Les résultats obtenus montrent que les schémas réactionnels sontcomplexes faisant intervenir de nombreuses voies de fragmentation et de condensationcompétitives. L'étude cinétique à différents temps de séjour montre que la fractionglucidique de la biomasse lignocellulosique a une réactivité très différente de sa fractionligneuse<br>This work deals with the study of the reaction pathway during the lignocellulosicconstituent liquefaction by water near its critical point. Experimental method consists ininvestigation of lignocellulosic model compounds conversion in pilot plant combined withdevelopment of a new multitechnique analytical approach in order to characterizeproduct chemical structures and molecular weights. Results show that reaction pathwaysare very complex consisting to several fragmentation and condensation competitivereactions. The kinetic study with different reaction times reveals an important differenceof comportment for the glucidic fraction than the lignin fraction of biomass

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Book chapters on the topic "Lignin hydrothermal liquefaction"

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Dunn, Kameron G., and Philip A. Hobson. "Hydrothermal liquefaction of lignin." In Sugarcane-Based Biofuels and Bioproducts. John Wiley & Sons, Inc, 2016. http://dx.doi.org/10.1002/9781118719862.ch7.

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Gundupalli, Marttin Paulraj, Anne Sahithi Somavarapu Thomas, Sathish Paulraj Gundupalli, Debraj Bhattacharyya, and Malinee Sriariyanun. "Hydrothermal Liquefaction (HTL) of Kraft Lignin (KL) Recovered from Lignocellulosic Biomass: State of the Art." In Clean Energy Production Technologies. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-4505-1_13.

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3

Alhassan, Yahaya, Ursel Hornung, and Idris M. Bugaje. "Lignin Hydrothermal Liquefaction into Bifunctional Chemicals: A Concise Review." In Biorefinery Concepts, Energy and Products. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.90860.

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Tran, Khanh-Quang. "Nozzle reactor for continuous fast hydrothermal liquefaction of lignin residue." In Waste Biorefinery. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-818228-4.00003-4.

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Conference papers on the topic "Lignin hydrothermal liquefaction"

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Wang, Haoyu, Xue Han, Minkang Liu, Yimin Zeng, and Chunbao Charles Xu. "Comparative Studies on Corrosion Performance of UNS R20033 under Batch-mode Hydrothermal Liquefaction (HTL) Conversion of Typical Model Compounds in Lignocellulosic Biomass." In CONFERENCE 2024. AMPP, 2024. https://doi.org/10.5006/c2024-21156.

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Abstract Hydrothermal liquefaction (HTL) is an important thermochemical technology which uses hot pressurized water to convert wet biomass or biowaste feedstocks into biocrude oils and other marketable bio-chemicals. However, the widespread commercialization of HTL technology could be challenging due to the corrosion of process core equipment, especially the refining reactors. The presence of hot pressurized water, aggressive catalyst, and organic products can lead to serious corrosion damage and even stress corrosion cracking risks on HTL reactors. Lignocellulosic biomass comprises three primary components: cellulose, hemicellulose, and lignin. These components exhibit distinct behaviors during HTL conversion, leading to variations in the chemical environment and properties of the resulting products. This study aims to compare the corrosion modes and extents of a typical austenitic alloy (UNS R20033) under HTL of three typical biomass model compounds (cellulose, xylan, and alkali lignin) to facilitate the development of corrosion mechanisms in biomass HTL environment.

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