Low-temperature catalytic hydrothermal treatment of wood biomass: analysis of liquid products

Karagöz, Selhan; Bhaskar, Thallada; Muto, Akinori; Sakata, Yusaku; Oshiki, Toshiyuki; Kishimoto, Tamiya

doi:10.1016/j.cej.2005.01.007

Cited by 224 publications

(128 citation statements)

References 33 publications

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“…The biochars used in this study were obtained from a typical hydrothermal treatment process [11,12]. Briefly, 5 g biomass (pinewood or rice husk) was loaded with 30 ml de-ionized water into a 100-ml autoclave and nitrogen gas was used to purge the air outside the reactor.…”

Section: Biochars Preparationmentioning

confidence: 99%

“…This process produces biochar as one of the major products and with increasing importance of bio-oil large amounts of biochar will be available in the near future [11][12][13][14][15]. In the field of biomass hydrothermal conversion, most attention has been focused on the liquid product (bio-oil), but the biochar, which is also an attractive byproduct, has received less attention.…”

Section: Introductionmentioning

confidence: 99%

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Removal of lead from water using biochars prepared from hydrothermal liquefaction of biomass

Liu

Zhang

2009

Journal of Hazardous Materials

611

228

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a b s t r a c tHydrothermal conversion of biomass into biofuel could produce a special type of biochar as byproduct. This biochar is quite different from biochar derived from high temperature pyrolysis. In the present study, two biochars, prepared from hydrothermal liquefaction of pinewood (P300) and rice husk (R300), were characterized and investigated for lead removal from aqueous solution. The results indicated that the biochars contained a large amount of oxygen-containing groups on the surface, which were quite effective for lead removal with capacities of 4.25 and 2.40 mg/g for P300 and R300, respectively. The adsorption equilibrium was achieved around 5 h. Higher temperature favored the removal capacity implying that the adsorption was an endothermic process. The adsorption data at optimum solution pH 5 could be well described by Langmuir model and the adsorption process was well fitted by pseudo-second-order model. Moreover, it was found that the adsorption was mainly controlled by film diffusion. Thermodynamics analysis suggested that lead adsorption onto the biochars was physical endothermic process.

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Section: Biochars Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of lead from water using biochars prepared from hydrothermal liquefaction of biomass

Liu

Zhang

2009

Journal of Hazardous Materials

611

228

View full text Add to dashboard Cite

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“…The final thermal conversion of wood yields three basic products; liquid (liquid hydrocarbon and water), solid (biochar) and gas [81]. Wood feedstock, containing higher lignin content, produce the highest biochar yields at 500 °C compared to lower and higher temperatures of pyrolysis [82]; Table 1 highlights the fate of feedstock in a thermal treatment reactor.…”

Section: Biochar Productionmentioning

confidence: 99%

Impact of Biochar on Organic Contaminants in Soil: A Tool for Mitigating Risk?

Ogbonnaya

Semple

2013

Agronomy

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Abstract:The presence of biochar in soils through natural processes (forest fires, bush burning) or through application to soil (agriculture, carbon storage, remediation, waste management) has received a significant amount of scientific and regulatory attention. Biochar alters soil properties, encourages microbial activity and enhances sorption of inorganic and organic compounds, but this strongly depends on the feedstock and production process of biochar. This review considers biochar sources, the production process and result of pyrolysis, interactions of biochar with soil, and associated biota. Furthermore, the paper focuses on the interactions between biochar and common anthropogenic organic contaminants, such as polycyclic aromatic hydrocarbons (PAHs), pesticides, and dioxins, which are often deposited in the soil environment. It then considers the feasibility of applying biochar in remediation technologies in addition to other perspective areas yet to be explored.

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“…Due to the complex chemical composition of lignocellulosic biomass, its hydrothermal conversion produces a complex mixture of products. The high polydispersity of these products in terms of oxygenated chemical functions and molecular weights makes their characterization awkward [7][8][9][10][11][12][13][14]. The approach that can be carried out to simplify the reaction pathway investigation consists in studying transformation of compounds representative of lignocellulosic constituents (i.e.…”

Section: Introductionmentioning

confidence: 99%

Correspondence Between Structure and Reactivity During Hydrothermal Conversion of Lignocellulosic Macromolecules

Barbier

Charon

Dupassieux

et al. 2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Re´sume´-Relation entre la structure et la re´activite´en conversion hydrothermale des macromole´cules de lignocellulosique -Ce travail porte sur l'e´tude des voies re´actionnelles accompagnant la lique´faction thermochimique du bois et de ses constituants lignocellulosiques lors d'un traitement hydrothermal. Pour ce faire, une approche analytique multi-technique originale combinant des me´thodes chromatographiques et spectroscopiques comple´mentaires a e´te´de´veloppe´e afin de caracte´riser les structures et les masses mole´culaires des produits. Les re´sultats obtenus montrent que la fraction holocellulosique et la fraction ligneuse de la biomasse ont des re´activite´s tre`s diffe´rentes. Bien que les deux mate´riaux re´agissent selon des sche´mas re´actionnels complexes faisant intervenir de nombreuses voies de fragmentation et de condensation compe´titives, la fraction holocellulosique re´agit par une premie`re e´tape de fragmentation suivie de la condensation des fragments ge´ne´re´s alors que la lignine re´agit principalement par de´polyme´risation partielle. Au cours de la lique´faction de la biomasse lignocellulosique, les compose´s provenant de la transformation des fractions holocellulosique et ligneuse se trouvent en contact les uns avec les autres dans le milieu hydrothermal et re´agissent ensemble pour former des produits de condensation.Abstract -Correspondence Between Structure and Reactivity During Hydrothermal Conversion of Lignocellulosic Macromolecules -In this study, reaction pathway of a woody biomass under hydrothermal conditions is investigated in order to further understand reactions that occur during the thermochemical liquefaction of a lignocellulosic biomass. A multitechnique analytical approach combining chromatographic and spectroscopic techniques has been developed in order to characterize both chemical structure and molecular weight of the products. From our experiments, we can assume that the holocellulosic and the ligneous fractions of biomass have different reactivity under hydrothermal condition. Although hydrothermal conversion of holocellulose and lignin occur both according to a complex pathway composed of competitive fragmentation and condensation reactions, holocellulose reacts first by total fragmentation to low molecular weight compounds followed by the condensation of the fragment to heavy molecular weight compounds, whereas lignin reacts essentially

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Low-temperature catalytic hydrothermal treatment of wood biomass: analysis of liquid products

Cited by 224 publications

References 33 publications

Removal of lead from water using biochars prepared from hydrothermal liquefaction of biomass

Removal of lead from water using biochars prepared from hydrothermal liquefaction of biomass

Impact of Biochar on Organic Contaminants in Soil: A Tool for Mitigating Risk?

Correspondence Between Structure and Reactivity During Hydrothermal Conversion of Lignocellulosic Macromolecules

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