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Zhang Y, Xin D, Wen P, Chen X, Jia L, Lu Z, Zhang J. Comparison of Alkaline Sulfite Pretreatment and Acid Sulfite Pretreatment with Low Chemical Loading in Saccharification of Poplar. Appl Biochem Biotechnol 2023; 195:4414-4428. [PMID: 36696039 DOI: 10.1007/s12010-023-04351-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/10/2023] [Indexed: 01/26/2023]
Abstract
Sulfite pretreatment is a productive process for lignin dissolution in lignocelluloses and to reduce the hydrophobicity of lignin by sulfonation, thus promoting the hydrolyzability of the substrate. Previously, sulfite pretreatment needs high dosages of chemicals and thus results in the high cost of the pretreatment and the great pressure of environmental pollution. To overcome these problems, it was crucial to research whether alkaline sulfite pretreatment (ALS) and acid sulfite pretreatment (ACS) with low chemical loading could enhance the saccharification of poplar. In this work, the results indicated that with low loading of chemicals in sulfite pretreatment, ALS pretreatment (1.6% Na2SO3 and 0.5% NaOH) at 180 °C removed more lignin, resulted in lower hydrophobicity and higher cellulase adsorption capacity of poplar than ACS pretreatment (1.6% Na2SO3 and 0.5% H2SO4) at 180 °C. A satisfying glucose yield of 84.9% and a xylose yield of 76.0% were obtained from poplar after ALS pretreatment with 1.6% Na2SO3 and 0.5% NaOH at 180 °C for 1 h using 10 FPU cellulase/g dry matter, saving sodium sulfite by 60.0% compared to the loading of sulfite in traditional sulfite pretreatment. The strategy developed in this work reduced chemical loading and cellulase loading in alkali sulfite pretreatment for the saccharification of poplar.
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Affiliation(s)
- Ying Zhang
- College of Forestry, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Donglin Xin
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China
| | - Peiyao Wen
- College of Forestry, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Xiang Chen
- College of Forestry, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Lili Jia
- College of Forestry, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Zhoumin Lu
- College of Forestry, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, China.
| | - Junhua Zhang
- College of Forestry, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, China
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2
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Applications of ionic liquids for the biochemical transformation of lignocellulosic biomass into biofuels and biochemicals: A critical review. Biochem Eng J 2023. [DOI: 10.1016/j.bej.2023.108850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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3
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Thermochemical Liquefaction as a Cleaner and Efficient Route for Valuing Pinewood Residues from Forest Fires. Molecules 2021; 26:molecules26237156. [PMID: 34885736 PMCID: PMC8659133 DOI: 10.3390/molecules26237156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 11/17/2022] Open
Abstract
Biomass thermochemical liquefaction is a chemical process with multifunctional bio-oil as its main product. Under this process, the complex structure of lignocellulosic components can be hydrolysed into smaller molecules at atmospheric pressure. This work demonstrates that the liquefaction of burned pinewood from forest fires delivers similar conversion rates into bio-oil as non-burned wood does. The bio-oils from four burned biomass fractions (heartwood, sapwood, branches, and bark) showed lower moisture content and higher HHV (ranging between 32.96 and 35.85 MJ/kg) than the initial biomasses. The increased HHV resulted from the loss of oxygen, whereas the carbon and hydrogen mass fractions increased. The highest conversion of bark and heartwood was achieved after 60 min of liquefaction. Sapwood, pinewood, and branches reached a slightly higher conversion, with yields about 8% greater, but with longer liquefaction time resulting in higher energy consumption. Additionally, the van Krevelen diagram indicated that the produced bio-oils were closer and chemically more compatible (in terms of hydrogen and oxygen content) to the hydrocarbon fuels than the initial biomass counterparts. In addition, bio-oil from burned pinewood was shown to be a viable alternative biofuel for heavy industrial applications. Overall, biomass from forest fires can be used for the liquefaction process without compromising its efficiency and performance. By doing so, it recovers part of the lost value caused by wildfires, mitigating their negative effects.
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Asim AM, Uroos M, Naz S, Muhammad N. Pyridinium protic ionic liquids: Effective solvents for delignification of wheat straw. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115013] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Zhang J, Zhang X, Yang M, Singh S, Cheng G. Transforming lignocellulosic biomass into biofuels enabled by ionic liquid pretreatment. BIORESOURCE TECHNOLOGY 2021; 322:124522. [PMID: 33340950 DOI: 10.1016/j.biortech.2020.124522] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/04/2020] [Accepted: 12/05/2020] [Indexed: 05/11/2023]
Abstract
Processes that can convert lignocellulosic biomass into biofuels and chemicals are particularly attractive considering renewability and minimal environmental impact. Ionic liquids (ILs) have been used as novel solvents in the process development in that they can effectively deconstruct recalcitrant lignocellulosic biomass for high sugar yield and lignin recovery. From cellulose-dissolving ILs to choline-based and protic acidic ILs, extensive research in this field has been done, driven by the promising future of IL pretreatment. Meanwhile, shortcomings and technological hurdles are ascertained during research and developments. It is necessary to present a general overview of recent developments and challenges in this field. In this review paper, three aspects of advances in IL pretreatment are critically analyzed: biocompatible ILs, protic acidic ILs and combinatory pretreatments.
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Affiliation(s)
- Jinxu Zhang
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xin Zhang
- State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
| | - Mingkun Yang
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Seema Singh
- Biomass Science and Conversion Technology Department, Sandia National Laboratories, Livermore, CA 94551, USA
| | - Gang Cheng
- State Key Laboratory of Organic-Inorganic Composites and College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
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6
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Muazzam R, Asim AM, Uroos M, Muhammad N, Hallett JP. Evaluating the potential of a novel hardwood biomass using a superbase ionic liquid. RSC Adv 2021; 11:19095-19105. [PMID: 35478656 PMCID: PMC9033503 DOI: 10.1039/d1ra01328a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 05/10/2021] [Indexed: 11/21/2022] Open
Abstract
Lignocellulosic biomass, being ubiquitous and easily accessible, bears a huge potential for sustainable energy and other products.
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Affiliation(s)
- Rabia Muazzam
- Centre for Research in Ionic Liquids
- School of Chemistry
- University of the Punjab
- Lahore
- Pakistan
| | - Azmat Mehmood Asim
- Centre for Research in Ionic Liquids
- School of Chemistry
- University of the Punjab
- Lahore
- Pakistan
| | - Maliha Uroos
- Centre for Research in Ionic Liquids
- School of Chemistry
- University of the Punjab
- Lahore
- Pakistan
| | - Nawshad Muhammad
- Institute of Basic Medical Sciences
- Khyber Medical University
- Pakistan
| | - Jason P. Hallett
- Department of Chemical Engineering
- Imperial College London
- London
- UK
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7
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Asim AM, Uroos M, Muhammad N. Extraction of lignin and quantitative sugar release from biomass using efficient and cost-effective pyridinium protic ionic liquids. RSC Adv 2020; 10:44003-44014. [PMID: 35517143 PMCID: PMC9058325 DOI: 10.1039/d0ra09098k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 11/16/2020] [Indexed: 11/29/2022] Open
Abstract
Lignocellulosic biomass is enormously abundant around the globe. It bears huge potential for renewable products as its components can be converted to many useful products via cheaper processes. Recently, the component of biomass that has attracted enormous attention is lignin owing to its several aromatic or phenolic constituents. The utilization of lignin, however, is hindered by its troublesome separation mainly due to the difficult nature of the lignocellulosic biomass. Protic ionic liquids have great potential for extraction of lignin from the lignocellulosic biomass to make it viable for various transformations. In this study, protic ionic liquids comprising a pyridinium cation and a dihydrogen phosphate anion (H2PO4−) were prepared and used for lignin extraction and subsequent saccharification of the cellulose pulp. The ILs exhibited appreciably high lignin yields (optimum 73%) under mild conditions (100 °C) and shorter time (2 h). Fairly good sugar (glucose) yields (77%) verify effective delignification. The analysis of ILs and biomass was accomplished by H-NMR, FT-IR, SEM, HSQC and GPC. Lignocellulosic biomass is enormously abundant around the globe. It bears huge potential for renewable products as its components can be converted to many useful products via cheaper processes.![]()
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Affiliation(s)
| | - Maliha Uroos
- Institute of Chemistry, University of the Punjab 54000 Lahore Pakistan
| | - Nawshad Muhammad
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus 54600 Lahore Pakistan .,Department of Dental Materials, Institute of Medical Sciences Khyber Medical University Peshawar Pakistan
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8
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Escobar ELN, da Silva TA, Pirich CL, Corazza ML, Pereira Ramos L. Supercritical Fluids: A Promising Technique for Biomass Pretreatment and Fractionation. Front Bioeng Biotechnol 2020; 8:252. [PMID: 32391337 PMCID: PMC7191036 DOI: 10.3389/fbioe.2020.00252] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 03/11/2020] [Indexed: 11/17/2022] Open
Abstract
Lignocellulosic biomasses are primarily composed of cellulose, hemicelluloses and lignin and these biopolymers are bonded together in a heterogeneous matrix that is highly recalcitrant to chemical or biological conversion processes. Thus, an efficient pretreatment technique must be selected and applied to this type of biomass in order to facilitate its utilization in biorefineries. Classical pretreatment methods tend to operate under severe conditions, leading to sugar losses by dehydration and to the release of inhibitory compounds such as furfural (2-furaldehyde), 5-hydroxy-2-methylfurfural (5-HMF), and organic acids. By contrast, supercritical fluids can pretreat lignocellulosic materials under relatively mild pretreatment conditions, resulting in high sugar yields, low production of fermentation inhibitors and high susceptibilities to enzymatic hydrolysis while reducing the consumption of chemicals, including solvents, reagents, and catalysts. This work presents a review of biomass pretreatment technologies, aiming to deliver a state-of-art compilation of methods and results with emphasis on supercritical processes.
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Affiliation(s)
- Estephanie Laura Nottar Escobar
- Applied Kinetics and Thermodynamics Laboratory, Department of Chemical Engineering, Federal University of Paraná, Curitiba, Brazil
| | - Thiago Alessandre da Silva
- Department of Chemistry, Research Center in Applied Chemistry, Federal University of Paraná, Curitiba, Brazil
| | - Cleverton Luiz Pirich
- Department of Chemistry, Research Center in Applied Chemistry, Federal University of Paraná, Curitiba, Brazil
| | - Marcos Lúcio Corazza
- Applied Kinetics and Thermodynamics Laboratory, Department of Chemical Engineering, Federal University of Paraná, Curitiba, Brazil
| | - Luiz Pereira Ramos
- Department of Chemistry, Research Center in Applied Chemistry, Federal University of Paraná, Curitiba, Brazil
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9
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Malaret F, Gschwend FJV, Lopes JM, Tu WC, Hallett JP. Eucalyptus red grandis pretreatment with protic ionic liquids: effect of severity and influence of sub/super-critical CO 2 atmosphere on pretreatment performance. RSC Adv 2020; 10:16050-16060. [PMID: 35493672 PMCID: PMC9052920 DOI: 10.1039/d0ra02040k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 04/07/2020] [Indexed: 11/21/2022] Open
Abstract
Deconstruction of lignocellulosic biomass with low-cost ionic liquids (ILs) has proven to be a promising technology that could be implemented in a biorefinery to obtain renewable materials, fuels and chemicals. This study investigates the pretreatment efficacy of the ionoSolv pretreatment of Eucalyptus red grandis using the low-cost ionic liquid triethylammonium hydrogen sulfate ([N2220][HSO4]) in the presence of 20 wt% water at 10% solids loading. The temperatures investigated were 120 °C and 150 °C. Also, the influence of performing the pretreatment under sub-critical and supercritical CO2 was investigated. The IL used is very effective in deconstructing eucalyptus, producing cellulose-rich pulps resulting in enzymatic saccharification yields of 86% for some pretreatment conditions. It has been found that under a CO2 atmosphere, the ionoSolv process is pressure independent. The good performance of this IL in the pretreatment of eucalyptus is promising for the development of a large-scale ionoSolv pretreatment processes.
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Affiliation(s)
- Francisco Malaret
- Department of Chemical Engineering, Imperial College London London SW7 2AZ UK http://www.imperial.ac.uk/people/j.hallett +44 (0)2075945388
| | - Florence J V Gschwend
- Department of Chemical Engineering, Imperial College London London SW7 2AZ UK http://www.imperial.ac.uk/people/j.hallett +44 (0)2075945388
| | - Joana M Lopes
- High Pressure Process Group, Department of Chemical Engineering and Environmental Technology, University of Valladolid Spain
| | - Wei-Chien Tu
- Department of Chemical Engineering, Imperial College London London SW7 2AZ UK http://www.imperial.ac.uk/people/j.hallett +44 (0)2075945388
| | - Jason P Hallett
- Department of Chemical Engineering, Imperial College London London SW7 2AZ UK http://www.imperial.ac.uk/people/j.hallett +44 (0)2075945388
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10
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Antunes FAF, Chandel AK, Terán-Hilares R, Ingle AP, Rai M, Dos Santos Milessi TS, da Silva SS, Dos Santos JC. Overcoming challenges in lignocellulosic biomass pretreatment for second-generation (2G) sugar production: emerging role of nano, biotechnological and promising approaches. 3 Biotech 2019; 9:230. [PMID: 31139545 DOI: 10.1007/s13205-019-1761-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 05/13/2019] [Indexed: 01/12/2023] Open
Abstract
Production of green chemicals and biofuels in biorefineries is the potential alternative for petrochemicals and gasoline in transitioning of petro-economy into bioeconomy. However, an efficient biomass pretreatment process must be considered for the successful deployment of biorefineries, mainly for use of lignocellulosic raw materials. However, biomass recalcitrance plays a key role in its saccharification to obtain considerable sugar which can be converted into ethanol or other biochemicals. In the last few decades, several pretreatment methods have been developed, but their feasibility at large-scale operations remains as a persistent bottleneck in biorefineries. Pretreatment methods such as hydrodynamic cavitation, ionic liquids, and supercritical fluids have shown promising results in terms of either lignin or hemicellulose removal, thus making remaining carbohydrate fraction amenable to the enzymatic hydrolysis for clean and high amount of fermentable sugar production. However, their techno-economic feasibility at industrial scale has not been yet studied in detail. Besides, nanotechnological-based technologies could play an important role in the economically viable 2G sugar production in future. Considering these facts, in the present review, we have discussed the existing promising pretreatment methods for lignocellulosic biomass and their challenges, besides this strategic role of nano and biotechnological approaches towards the viability and sustainability of biorefineries is also discussed.
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Affiliation(s)
- Felipe Antonio Fernandes Antunes
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Anuj Kumar Chandel
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Ruly Terán-Hilares
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Avinash P Ingle
- 3Nanotechnology Laboratory, Department of Biotechnology, SGB Amravati University, Amravati, 444 602 India
| | - Mahendra Rai
- 3Nanotechnology Laboratory, Department of Biotechnology, SGB Amravati University, Amravati, 444 602 India
| | | | - Silvio Silvério da Silva
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Júlio César Dos Santos
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
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11
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Deterioration of Wood Plastics Composites by the White-Rot Fungus Pycnoporus sanguineus. JOURNAL OF COMPOSITES SCIENCE 2019. [DOI: 10.3390/jcs3010024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Wood plastic composites (WPC) are characterized by the mixing of wood fibers with plastics, allowing the production of new products whose characteristics are in several aspects superior to those of the original products and represent an expanding class of durable and low-cost materials in which their uses can reduce the environmental footprint and the dependence on petroleum products. Nevertheless, WPC has some setbacks, including biodegradation, which shortens its life span. In this study, the wood composite was exposed to the white-rot fungus Pycnoporus sanguineus in order to evaluate its resistance to biodegradation. The WPC was prepared with a 1:1 ratio of Eucalyptus spp. bark as reinforcement agent and polypropylene as matrix. Mechanical and rheological properties and mass loss were evaluated from 15 to 120 days of fungus exposure. After 15 days, a mass loss was detected, which transmitted a negligible effect on the impact resistance of the composite. For the 120-day fungus-exposed composite, the fungus produced a biofilm under the WPC that create a special environment for lignocellulosic consuming led to deterioration of the mechanical properties and minor changes on the thermal–chemical stability of the WPC. Finally, the study gave a great indication of the susceptibility of a Eucalyptus-based composite to biodegradation.
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12
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Jiang B, Yu J, Luo X, Zhu Y, Jin Y. A strategy to improve enzymatic saccharification of wheat straw by adding water-soluble lignin prepared from alkali pretreatment spent liquor. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.05.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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13
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Ko HU, Zhai L, Park JH, Lee JY, Kim D, Kim J. Poly(vinyl alcohol)-lignin blended resin for cellulose-based composites. J Appl Polym Sci 2018. [DOI: 10.1002/app.46655] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hyun-U Ko
- Creative Research Center for Nanocellulose Future Composites, Department of Mechanical Engineering; Inha University, 100 Inha-Ro; Nam-Ku Incheon 22212 South Korea
| | - Lindong Zhai
- Creative Research Center for Nanocellulose Future Composites, Department of Mechanical Engineering; Inha University, 100 Inha-Ro; Nam-Ku Incheon 22212 South Korea
| | - Jung Ho Park
- Creative Research Center for Nanocellulose Future Composites, Department of Mechanical Engineering; Inha University, 100 Inha-Ro; Nam-Ku Incheon 22212 South Korea
| | - Ji Yun Lee
- Creative Research Center for Nanocellulose Future Composites, Department of Mechanical Engineering; Inha University, 100 Inha-Ro; Nam-Ku Incheon 22212 South Korea
| | - Debora Kim
- Creative Research Center for Nanocellulose Future Composites, Department of Mechanical Engineering; Inha University, 100 Inha-Ro; Nam-Ku Incheon 22212 South Korea
| | - Jaehwan Kim
- Creative Research Center for Nanocellulose Future Composites, Department of Mechanical Engineering; Inha University, 100 Inha-Ro; Nam-Ku Incheon 22212 South Korea
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Healey AL, Lee DJ, Lupoi JS, Papa G, Guenther JM, Corno L, Adani F, Singh S, Simmons BA, Henry RJ. Evaluation of Relationships between Growth Rate, Tree Size, Lignocellulose Composition, and Enzymatic Saccharification in Interspecific Corymbia Hybrids and Parental Taxa. FRONTIERS IN PLANT SCIENCE 2016; 7:1705. [PMID: 27917179 PMCID: PMC5114311 DOI: 10.3389/fpls.2016.01705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 10/31/2016] [Indexed: 05/23/2023]
Abstract
In order for a lignocellulosic bioenergy feedstock to be considered sustainable, it must possess a high rate of growth to supply biomass for conversion. Despite the desirability of a fast growth rate for industrial application, it is unclear what effect growth rate has on biomass composition or saccharification. We characterized Klason lignin, glucan, and xylan content with response to growth in Corymbia interspecific F1 hybrid families (HF) and parental species Corymbia torelliana and C. citriodora subspecies variegata and measured the effects on enzymatic hydrolysis from hydrothermally pretreated biomass. Analysis of biomass composition within Corymbia populations found similar amounts of Klason lignin content (19.7-21.3%) among parental and hybrid populations, whereas glucan content was clearly distinguished within C. citriodora subspecies variegata (52%) and HF148 (60%) as compared to other populations (28-38%). Multiple linear regression indicates that biomass composition is significantly impacted by tree size measured at the same age, with Klason lignin content increasing with diameter breast height (DBH) (+0.12% per cm DBH increase), and glucan and xylan typically decreasing per DBH cm increase (-0.7 and -0.3%, respectively). Polysaccharide content within C. citriodora subspecies variegata and HF-148 were not significantly affected by tree size. High-throughput enzymatic saccharification of hydrothermally pretreated biomass found significant differences among Corymbia populations for total glucose production from biomass, with parental Corymbia torelliana and hybrids HF-148 and HF-51 generating the highest amounts of glucose (~180 mg/g biomass, respectively), with HF-51 undergoing the most efficient glucan-to-glucose conversion (74%). Based on growth rate, biomass composition, and further optimization of enzymatic saccharification yield, high production Corymbia hybrid trees are potentially suitable for fast-rotation bioenergy or biomaterial production.
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Affiliation(s)
- Adam L. Healey
- Queensland Alliance for Agriculture and Food Innovation, University of QueenslandSt. Lucia, QLD, Australia
| | - David J. Lee
- Forest Industries Research Centre, University of the Sunshine CoastMaroochydore, QLD, Australia
- Forestry & Biosciences, Agri-Science Queensland, Department of Agriculture and FisheriesGympie, QLD, Australia
| | | | - Gabriella Papa
- Joint BioEnergy Institute, Lawrence Berkeley National LaboratoryEmeryville, CA, USA
| | - Joel M. Guenther
- Joint BioEnergy Institute, Lawrence Berkeley National LaboratoryEmeryville, CA, USA
- Biological and Engineering Sciences Center, Sandia National LaboratoriesLivermore, CA, USA
| | - Luca Corno
- Gruppo Ricicla – Biomass and Bioenergy Laboratory, DiSAA, University of MilanMilan, Italy
| | - Fabrizio Adani
- Gruppo Ricicla – Biomass and Bioenergy Laboratory, DiSAA, University of MilanMilan, Italy
| | - Seema Singh
- Joint BioEnergy Institute, Lawrence Berkeley National LaboratoryEmeryville, CA, USA
- Biological and Engineering Sciences Center, Sandia National LaboratoriesLivermore, CA, USA
| | - Blake A. Simmons
- Joint BioEnergy Institute, Lawrence Berkeley National LaboratoryEmeryville, CA, USA
- Biological and Engineering Sciences Center, Sandia National LaboratoriesLivermore, CA, USA
| | - Robert J. Henry
- Queensland Alliance for Agriculture and Food Innovation, University of QueenslandSt. Lucia, QLD, Australia
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15
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Healey AL, Lee DJ, Furtado A, Simmons BA, Henry RJ. Efficient Eucalypt Cell Wall Deconstruction and Conversion for Sustainable Lignocellulosic Biofuels. Front Bioeng Biotechnol 2015; 3:190. [PMID: 26636077 PMCID: PMC4653827 DOI: 10.3389/fbioe.2015.00190] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Accepted: 11/04/2015] [Indexed: 11/13/2022] Open
Abstract
In order to meet the world's growing energy demand and reduce the impact of greenhouse gas emissions resulting from fossil fuel combustion, renewable plant-based feedstocks for biofuel production must be considered. The first-generation biofuels, derived from starches of edible feedstocks, such as corn, create competition between food and fuel resources, both for the crop itself and the land on which it is grown. As such, biofuel synthesized from non-edible plant biomass (lignocellulose) generated on marginal agricultural land will help to alleviate this competition. Eucalypts, the broadly defined taxa encompassing over 900 species of Eucalyptus, Corymbia, and Angophora are the most widely planted hardwood tree in the world, harvested mainly for timber, pulp and paper, and biomaterial products. More recently, due to their exceptional growth rate and amenability to grow under a wide range of environmental conditions, eucalypts are a leading option for the development of a sustainable lignocellulosic biofuels. However, efficient conversion of woody biomass into fermentable monomeric sugars is largely dependent on pretreatment of the cell wall, whose formation and complexity lend itself toward natural recalcitrance against its efficient deconstruction. A greater understanding of this complexity within the context of various pretreatments will allow the design of new and effective deconstruction processes for bioenergy production. In this review, we present the various pretreatment options for eucalypts, including research into understanding structure and formation of the eucalypt cell wall.
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Affiliation(s)
- Adam L. Healey
- Queensland Alliance for Agriculture and Food Innovation, University of Queensland, St. Lucia, QLD, Australia
| | - David J. Lee
- Forest Industries Research Centre, University of the Sunshine Coast, Maroochydore, QLD, Australia
- Department of Agriculture and Fisheries, Forestry and Biosciences, Agri-Science Queensland, Gympie, QLD, Australia
| | - Agnelo Furtado
- Queensland Alliance for Agriculture and Food Innovation, University of Queensland, St. Lucia, QLD, Australia
| | - Blake A. Simmons
- Queensland Alliance for Agriculture and Food Innovation, University of Queensland, St. Lucia, QLD, Australia
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA
- Biological and Engineering Sciences Center, Sandia National Laboratories, Livermore, CA, USA
| | - Robert J. Henry
- Queensland Alliance for Agriculture and Food Innovation, University of Queensland, St. Lucia, QLD, Australia
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