1
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Rissanen JV, Lagerquist L, Eränen K, Hemming J, Eklund P, Grènman H. O2 as initiator of autocatalytic degradation of hemicelluloses and monosaccharides in hydrothermal treatment of spruce. Carbohydr Polym 2022; 293:119740. [DOI: 10.1016/j.carbpol.2022.119740] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/30/2022] [Accepted: 06/13/2022] [Indexed: 11/24/2022]
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2
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Araujo-Barahona G, Eränen K, Oña JP, Murzin D, García-Serna J, Salmi T. Solid Foam Ru/C Catalysts for Sugar Hydrogenation to Sugar Alcohols─Preparation, Characterization, Activity, and Selectivity. Ind Eng Chem Res 2022; 61:2734-2747. [PMID: 35241873 PMCID: PMC8883585 DOI: 10.1021/acs.iecr.1c04501] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/25/2022] [Accepted: 02/02/2022] [Indexed: 11/29/2022]
Abstract
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Sugar alcohols are
obtained by hydrogenation of sugars in the presence
of ruthenium catalysts. The research effort was focused on the development
of solid foam catalysts based on ruthenium nanoparticles supported
on active carbon. This catalyst was used in kinetic experiments on
the hydrogenation of l-arabinose and d-galactose
at three temperatures (90, 100, and 120 °C) and two hydrogen
pressures (20 and 40 bar). Kinetic experiments were carried out with
binary sugar mixtures at different d-galactose-to-l-arabinose molar ratios to study the interactions of these sugars
in the presence of the prepared solid foam catalyst. The solid foam
catalyst preparation comprised the following steps: cutting of the
open-cell foam aluminum pieces, anodic oxidation pretreatment, carbon
coating, acid pretreatment, ruthenium incorporation, and ex
situ reduction. The carbon coating method comprised the polymerization
of furfuryl alcohol, followed by a pyrolysis process and activation
with oxygen. Incorporation of ruthenium on the carbon-coated foam
was done by incipient wetness impregnation (IWI), using ruthenium(III)
nitrosyl nitrate as the precursor. By applying IWI, it was possible
to prepare an active catalyst with a ruthenium load of 1.12 wt %,
which gave a high conversion of the sugars to the corresponding sugar
alcohols. The catalysts were characterized by SEM, HR-TEM, TPR, and
ICP-OES to interpret the catalyst behavior in terms of activity, durability,
and critical parameters for the catalyst preparation. Extensive kinetic
experiments were carried out in an isothermal laboratory-scale semibatch
reactor to which gaseous hydrogen was constantly added. High selectivities
toward the sugar alcohols, arabitol and galactitol, exceeding 98%
were obtained for both sugars, and the sugar conversions were within
the range of 53–97%, depending on temperature. The temperature
effect on the reaction rate was very strong, while the effect of hydrogen
pressure was minor. Regarding the sugar mixtures, in general, l-arabinose presented a higher reaction rate, and an acceleration
of the hydrogenation process was observed for both sugars as the ratio
of d-galactose to l-arabinose increased, evidently
because of competitive interactions on the catalyst surface.
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Affiliation(s)
- German Araujo-Barahona
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre (PCC), Åbo Akademi University, FI-20500 Turku/Åbo, Finland
- Grupo de Tecnologías a Presión, Instituto de Bioeconomía de la Universidad de Valladolid (BioEcoUVa), Departamento de Ingeniería Química y Tecnologías del Medio Ambiente, Escuela de Ingenierías Industriales, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Kari Eränen
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre (PCC), Åbo Akademi University, FI-20500 Turku/Åbo, Finland
| | - Jay Pee Oña
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre (PCC), Åbo Akademi University, FI-20500 Turku/Åbo, Finland
| | - Dmitry Murzin
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre (PCC), Åbo Akademi University, FI-20500 Turku/Åbo, Finland
| | - Juan García-Serna
- Grupo de Tecnologías a Presión, Instituto de Bioeconomía de la Universidad de Valladolid (BioEcoUVa), Departamento de Ingeniería Química y Tecnologías del Medio Ambiente, Escuela de Ingenierías Industriales, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Tapio Salmi
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre (PCC), Åbo Akademi University, FI-20500 Turku/Åbo, Finland
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3
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Yuan Q, Liu S, Ma MG, Ji XX, Choi SE, Si C. The Kinetics Studies on Hydrolysis of Hemicellulose. Front Chem 2021; 9:781291. [PMID: 34869229 PMCID: PMC8637159 DOI: 10.3389/fchem.2021.781291] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 10/07/2021] [Indexed: 11/13/2022] Open
Abstract
The kinetics studies is of great importance for the understanding of the mechanism of hemicellulose pyrolysis and expanding the applications of hemicellulose. In the past years, rapid progress has been paid on the kinetics studies of hemicellulose hydrolysis. In this article, we first introduced the hydrolysis of hemicelluloses via various strategies such as autohydrolysis, dilute acid hydrolysis, catalytic hydrolysis, and enzymatic hydrolysis. Then, the history of kinetic models during hemicellulose hydrolysis was summarized. Special attention was paid to the oligosaccharides as intermediates or substrates, acid as catalyst, and thermogravimetric as analyzer method during the hemicellulose hydrolysis. Furthermore, the problems and suggestions of kinetic models during hemicellulose hydrolysis was provided. It expected that this article will favor the understanding of the mechanism of hemicellulose pyrolysis.
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Affiliation(s)
- Qi Yuan
- Engineering Research Center of Forestry Biomass Materials and Bioenergy, Research Center of Biomass Clean Utilization, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing, China
| | - Shan Liu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Ming-Guo Ma
- Engineering Research Center of Forestry Biomass Materials and Bioenergy, Research Center of Biomass Clean Utilization, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing, China
| | - Xing-Xiang Ji
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Sun-Eun Choi
- Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Gangwon National University, Chuncheon, South Korea
| | - Chuanling Si
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, China
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4
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Pérez Nebreda A, Russo V, Di Serio M, Salmi T, Grénman H. Modelling of homogeneously catalyzed hemicelluloses hydrolysis in a laminar-flow reactor. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.10.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Han X, Guo Y, Liu X, Xia Q, Wang Y. Catalytic conversion of lignocellulosic biomass into hydrocarbons: A mini review. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.05.013] [Citation(s) in RCA: 114] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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6
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Aarum I, Devle H, Ekeberg D, Horn SJ, Stenstrøm Y. Characterization of Pseudo-Lignin from Steam Exploded Birch. ACS OMEGA 2018; 3:4924-4931. [PMID: 31458708 PMCID: PMC6641956 DOI: 10.1021/acsomega.8b00381] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 04/20/2018] [Indexed: 05/03/2023]
Abstract
There is a growing interest in a more wholesome utilization of biomass as the need for greener chemistry and non-mineral oil-based products increases. Lignin is the largest renewable resource for aromatic chemicals, which is found in all types of lignocellulosic biomass. Steam-explosion of lignocellulosic biomass is a useful pretreatment technique to make the polymeric material more available for processing. However, this heat-based pretreatment is known to result in the formation of pseudo-lignin, a lignin-like polymer made from carbohydrate degradation products. In this work, we have analyzed steam-exploded birch with a varying severity factor (3.1-5.0) by pyrolysis-gas chromatography-mass spectrometry, 2D-NMR, and Fourier transform infrared spectroscopy. The main results reveal a consumption of acetic acid at higher temperatures, with the increase of furan components in the pyrolyzate. The IR and NMR spectral data support these results, and there is a reason to believe that the conditions for humin formation are accomplished under steam explosion. Pseudo-lignin seems to be a humin-like compound.
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7
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Gallina G, Cabeza Á, Grénman H, Biasi P, García-Serna J, Salmi T. Hemicellulose extraction by hot pressurized water pretreatment at 160 ºC for 10 different woods: Yield and molecular weight. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.10.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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9
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Hemicelluloses from stone pine, holm oak, and Norway spruce with subcritical water extraction − comparative study with characterization and kinetics. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.07.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Gallina G, Alfageme ER, Biasi P, García-Serna J. Hydrothermal extraction of hemicellulose: from lab to pilot scale. BIORESOURCE TECHNOLOGY 2018; 247:980-991. [PMID: 30060438 DOI: 10.1016/j.biortech.2017.09.155] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 09/21/2017] [Accepted: 09/22/2017] [Indexed: 06/08/2023]
Abstract
A flow-through reactor for hemicelluloses extraction with hot pressurized water was scaled with a factor of 73. System performance was evaluated by comparing the temperature profile, extraction yield and kinetics of the two systems, performing experiments at 160 and 170°C, 11barg for 90min, using catalpa wood as raw material. Hemicellulose yields were 33.9% and 38.8% (lab scale 160°C and 170°C) and 35.7% and 41.7% (pilot scale 160°C and 170°C). The pilot reactor was upgraded by designing a manifold system capable to provide samples with different liquid residence time during the same experiment. Tests at 140, 150, 160 and 170°C were carried for 90min. Increasing yields (9.3-40.6%) and decreasing molecular weights (4078-1417Da) were obtained at increasing the temperature. Biomass/water ratio of 1/27 gave total average concentration of xylose of 0.4g/L (140°C) to 1.8g/L (170°C).
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Affiliation(s)
- Gianluca Gallina
- Department of Chemical Engineering and Environmental Technology, High Pressure Processes Group, University of Valladolid, Valladolid ES-47011, Spain
| | - Enrique Regidor Alfageme
- Department of Chemical Engineering and Environmental Technology, High Pressure Processes Group, University of Valladolid, Valladolid ES-47011, Spain
| | - Pierdomenico Biasi
- Process Chemistry Centre, Laboratory of Industrial Chemistry and Reaction Engineering, Åbo Akademi, Biskopsgatan 8, Turku/Åbo FI-20500, Finland
| | - Juan García-Serna
- Department of Chemical Engineering and Environmental Technology, High Pressure Processes Group, University of Valladolid, Valladolid ES-47011, Spain.
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11
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Peciulyte A, Samuelsson L, Olsson L, McFarland KC, Frickmann J, Østergård L, Halvorsen R, Scott BR, Johansen KS. Redox processes acidify and decarboxylate steam-pretreated lignocellulosic biomass and are modulated by LPMO and catalase. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:165. [PMID: 29946356 PMCID: PMC6004669 DOI: 10.1186/s13068-018-1159-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/31/2018] [Indexed: 05/07/2023]
Abstract
BACKGROUND The bioconversion of lignocellulosic feedstocks to ethanol is being commercialised, but further process development is required to improve their economic feasibility. Efficient saccharification of lignocellulose to fermentable sugars requires oxidative cleavage of glycosidic linkages by lytic polysaccharide monooxygenases (LPMOs). However, a proper understanding of the catalytic mechanism of this enzyme class and the interaction with other redox processes associated with the saccharification of lignocellulose is still lacking. The in-use stability of LPMO-containing enzyme cocktails is increased by the addition of catalase implying that hydrogen peroxide (H2O2) is generated in the slurry during incubation. Therefore, we sought to characterize the effects of enzymatic and abiotic sources of H2O2 on lignocellulose hydrolysis to identify parameters that could improve this process. Moreover, we studied the abiotic redox reactions of steam-pretreated wheat straw as a function of temperature and dry-matter (DM) content. RESULTS Abiotic reactions in pretreated wheat straw consume oxygen, release carbon dioxide (CO2) to the slurry, and decrease the pH. The magnitude of these reactions increased with temperature and with DM content. The presence of LPMO during saccharification reduced the amount of CO2 liberated, while the effect on pH was insignificant. Catalase led to increased decarboxylation through an unknown mechanism. Both in situ-generated and added H2O2 caused a decrease in pH. CONCLUSIONS Abiotic redox processes similar to those that occur in natural water-logged environments also affect the saccharification of pretreated lignocellulose. Heating of the lignocellulosic material and adjustment of pH trigger rapid oxygen consumption and acidification of the slurry. In industrial settings, it will be of utmost importance to control these processes. LPMOs interact with the surrounding redox compounds and redirect abiotic electron flow from decarboxylating reactions to fuel the oxidative cleavage of glycosidic bonds in cellulose.
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Affiliation(s)
- Ausra Peciulyte
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96 Gothenburg, Sweden
| | - Louise Samuelsson
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96 Gothenburg, Sweden
| | - Lisbeth Olsson
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96 Gothenburg, Sweden
| | | | - Jesper Frickmann
- Novozymes North America, 77 Perry’s Chapel Church Road, Franklinton, NC 27525 USA
| | | | | | | | - Katja S. Johansen
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivägen 10, 412 96 Gothenburg, Sweden
- Novozymes A/S, Krogshøjvej 36, 2880 Bagsværd, Denmark
- Department of Geosciences and Natural Resource Management, Copenhagen University, Rolighedsvej 23, 1958 Frederiksberg, Denmark
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12
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Yedro FM, Grénman H, Rissanen JV, Salmi T, García-Serna J, Cocero MJ. Chemical composition and extraction kinetics of Holm oak ( Quercus ilex ) hemicelluloses using subcritical water. J Supercrit Fluids 2017. [DOI: 10.1016/j.supflu.2017.01.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Wojtasz-Mucha J, Hasani M, Theliander H. Hydrothermal pretreatment of wood by mild steam explosion and hot water extraction. BIORESOURCE TECHNOLOGY 2017; 241:120-126. [PMID: 28551432 DOI: 10.1016/j.biortech.2017.05.061] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 05/08/2017] [Accepted: 05/10/2017] [Indexed: 05/15/2023]
Abstract
The aim of this work was to compare the two most common hydrothermal pre-treatments for wood - mild steam explosion and hot water extraction - both with the prospect of enabling extraction of hemicelluloses and facilitating further processing. Although both involve autohydrolysis of the lignocellulosic tissue, they are performed under different conditions: the most prominent difference is the rapid, disintegrating, discharge employed in the steam explosion opening up the structure. In this comparative study, the emphasis was placed on local composition of the pre-treated wood chips (of industrially relevant size). The results show that short hot water extraction treatments lead to significant variations in the local composition within the wood chips, while steam explosion accomplishes a comparably more even removal of hemicelluloses due to the advective mass transport during the explosion step.
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Affiliation(s)
- Joanna Wojtasz-Mucha
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE 412 96 Gothenburg, Sweden; Wallenberg Wood Science Center, The Royal Institute of Technology, Chalmers University of Technology, SE-100 44 Stockholm, Sweden
| | - Merima Hasani
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE 412 96 Gothenburg, Sweden; Wallenberg Wood Science Center, The Royal Institute of Technology, Chalmers University of Technology, SE-100 44 Stockholm, Sweden.
| | - Hans Theliander
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE 412 96 Gothenburg, Sweden; Wallenberg Wood Science Center, The Royal Institute of Technology, Chalmers University of Technology, SE-100 44 Stockholm, Sweden
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14
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Li Z, Jiang J, Fu Y, Wang Z, Qin M. Recycling of pre-hydrolysis liquor to improve the concentrations of hemicellulosic saccharides during water pre-hydrolysis of aspen woodchips. Carbohydr Polym 2017; 174:385-391. [PMID: 28821082 DOI: 10.1016/j.carbpol.2017.06.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 06/10/2017] [Accepted: 06/12/2017] [Indexed: 10/19/2022]
Abstract
In this study, the pre-hydrolysis liquor (PHL) was recycled during aspen chip water pre-hydrolysis, and the effects of PHL recycling on the extraction and accumulation of the hemicellulosic saccharides especially that with high molecular weight in the PHL were studied. The results showed that the concentration of hemicellulose saccharides in PHL depended on the pre-hydrolysis temperature and PHL recycling times. Compared to the unrecycled PHL, the concentration of hemicellulosic saccharides in PHL increased significantly when recycling PHL once or twice at 170°C. Furthermore, the amount of high-molecular-weight hemicelluloses (HMHs) in PHL recycled once at 170°C increased from 2.58g/L (unrecycled) to 6.18g/L, but the corresponding average molecular weight of HMHs decreased from 9.2kDa to 7.6kDa. The concentration of hemicellulosic saccharides in PHL decreased with PHL recycling time at 180°C, accompanied by the formation of a significant amount of furfural.
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Affiliation(s)
- Zongquan Li
- Key Laboratory of Paper Science & Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong, 250353, China.
| | - Jungang Jiang
- Key Laboratory of Paper Science & Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong, 250353, China.
| | - Yingjuan Fu
- Key Laboratory of Paper Science & Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong, 250353, China.
| | - Zhaojiang Wang
- Key Laboratory of Paper Science & Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong, 250353, China.
| | - Menghua Qin
- Key Laboratory of Paper Science & Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong, 250353, China; Organic Chemistry Laboratory, Taishan University, Taian, Shandong, 271021, China.
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15
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Cabeza A, Piqueras CM, Sobrón F, García-Serna J. Modeling of biomass fractionation in a lab-scale biorefinery: Solubilization of hemicellulose and cellulose from holm oak wood using subcritical water. BIORESOURCE TECHNOLOGY 2016; 200:90-102. [PMID: 26476169 DOI: 10.1016/j.biortech.2015.09.063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 09/16/2015] [Accepted: 09/18/2015] [Indexed: 06/05/2023]
Abstract
Lignocellulose fractionation is a key biorefinery process that need to be understood. In this work, a comprehensive study on hydrothermal-fractionation of holm oak in a semi-continuous system was conducted. The aim was to develop a physicochemical model in order to reproduce the role of temperature and water flow over the products composition. The experiments involved two sets: at constant flow (6mL/min) and two different ranges of temperature (140-180 and 240-280°C) and at a constant temperature range (180-260°C) and different flows: 11.0, 15.0 and 27.9mL/min. From the results, temperature has main influence and flow effect was observed only if soluble compounds were produced. The kinetic model was validated against experimental data, reproducing the total organic carbon profile (e.g. deviation of 33%) and the physicochemical phenomena observed in the process. In the model, it was also considered the variations of molecular weight of each biopolymer, successfully reproducing the biomass cleaving.
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Affiliation(s)
- A Cabeza
- High Pressure Processes Group, Department of Chemical Engineering and Environmental Tech., University of Valladolid, 47011 Valladolid, Spain
| | - C M Piqueras
- Planta Piloto de Ingeniería Química, PLAPIQUI-Universidad Nacional del Sur-CONICET, Camino La Carrindanga km 7, 8000 Bahía Blanca, Buenos Aires, Argentina
| | - F Sobrón
- High Pressure Processes Group, Department of Chemical Engineering and Environmental Tech., University of Valladolid, 47011 Valladolid, Spain
| | - J García-Serna
- High Pressure Processes Group, Department of Chemical Engineering and Environmental Tech., University of Valladolid, 47011 Valladolid, Spain.
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16
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Rissanen JV, Murzin DY, Salmi T, Grénman H. Aqueous extraction of hemicelluloses from spruce--From hot to warm. BIORESOURCE TECHNOLOGY 2016; 199:279-282. [PMID: 26363821 DOI: 10.1016/j.biortech.2015.08.116] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/18/2015] [Accepted: 08/19/2015] [Indexed: 06/05/2023]
Abstract
Aqueous extraction of hemicelluloses from spruce sapwood was performed at 90°C and 110°C. One of the main goals was to study if the same reaction mechanisms are valid at low temperatures as the ones observed previously at higher temperatures. An intensified cascade reactor system with a high liquid-solid ratio (∼ 180) was used in the experiments. Differences between the sugar specific extraction rates were observed especially in the beginning of the extraction processes. The experimental results fitted well to a kinetic model developed at higher temperatures, which confirms that the dissolution occurs with the same mechanisms at low temperature. Moreover, the correlation of the pH with the amount of sugars dissolved concurred with previous observations. The results contradict the assumption that low temperature dissolution would not occur and they help in studying the early stages of extraction as the kinetics are considerably slowed down.
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Affiliation(s)
- Jussi V Rissanen
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre, Faculty of Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Åbo/Turku, Finland
| | - Dmitry Yu Murzin
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre, Faculty of Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Åbo/Turku, Finland
| | - Tapio Salmi
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre, Faculty of Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Åbo/Turku, Finland
| | - Henrik Grénman
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre, Faculty of Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Åbo/Turku, Finland.
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17
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Two-phase modelling and simulation of the hydrothermal fractionation of holm oak in a packed bed reactor with hot pressurized water. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2015.07.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Kulasinski K, Guyer R, Keten S, Derome D, Carmeliet J. Impact of Moisture Adsorption on Structure and Physical Properties of Amorphous Biopolymers. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00248] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Karol Kulasinski
- Chair
of Building Physics, Swiss Federal University of Technology Zurich, Stefano-Franscini-Platz 5, 8093 Zürich, Switzerland
| | - Robert Guyer
- Solid
Earth Geophysics Group, Los Alamos National Laboratory, MS D446, Los Alamos, New Mexico 87545, United States
- Department
of Physics, University of Nevada, Reno, Nevada 89557, United States
| | - Sinan Keten
- Department
of Civil and Environmental Engineering, Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3109, United States
| | - Dominique Derome
- Laboratory
for Multiscale Studies in Building Physics, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Jan Carmeliet
- Chair
of Building Physics, Swiss Federal University of Technology Zurich, Stefano-Franscini-Platz 5, 8093 Zürich, Switzerland
- Laboratory
for Multiscale Studies in Building Physics, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
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19
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Rissanen JV, Grénman H, Xu C, Willför S, Murzin DY, Salmi T. Obtaining spruce hemicelluloses of desired molar mass by using pressurized hot water extraction. CHEMSUSCHEM 2014; 7:2947-53. [PMID: 25169811 DOI: 10.1002/cssc.201402282] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Indexed: 05/08/2023]
Abstract
There is growing interest in utilizing galactoglucomannan, the main hemicellulose in softwoods, for various applications such as cosmetics, pharmaceuticals, textiles, alimentary, and health products, as well as for the production of fuels. For fuel production and for using the rare sugars as platform chemicals, the hemicelluloses need to be hydrolyzed to sugar monomers, and for this purpose, low-molecular-mass extracts are favorable. However, for the other applications high molecular masses are required, which presents an even greater challenge for extraction. The ability to optimize the extraction process according to the needs of further processing, by using solely water as the solvent, is a key issue in the environmentally friendly utilization of this versatile raw material. The goal of this work is to study how the average molar mass of hemicelluloses extracted from spruce sapwood can be influenced by altering the experimental conditions. The main parameters influencing the extraction and hydrolysis of the hemicelluloses, namely, extraction time, temperature, pH, and chip size, were studied. The results show that it is feasible to develop an extraction process for harvesting spruce hemicelluloses, also of large molar masses, for industrial applications by using pressurized hot water extraction.
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Affiliation(s)
- Jussi V Rissanen
- Laboratory of Industrial Chemistry and Reaction Engineering, Process Chemistry Centre, Department of Chemical Engineering, Åbo Akademi University, Biskopsgatan 8, 20500 Åbo/Turku (Finland)
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