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Lignocellulosic biomass

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57:. Any biomass rich in cellulose, hemicelluloses, and lignin are commonly referred to as lignocellulosic biomass. Each component has a distinct chemical behavior. Being a composite of three very different components makes the processing of lignocellulose challenging. The evolved resistance to degradation or even separation is referred to as recalcitrance. Overcoming this recalcitrance to produce useful, high value products requires a combination of heat, chemicals, enzymes, and microorganisms. These carbohydrate-containing polymers contain different sugar monomers (six and five carbon sugars) and they are covalently bound to lignin. 20: 208:. In this process lignin and hemicellulose are typically separated from the plant material leaving the fibrous cellulose component to be processed for paper production, or 'chemical cellulose'. Through the pulp process most of the lignin is removed and discharged as waste material in the form of effluent/wastewater before then being used as low-value fuel to generate electricity and heat. In principle, the world’s current sugar demand could be fulfilled by repurposing pulp and paper mills for lignocellulosic sugar production, making it a promising 330:
in countries where wood resources are already being overused, it is possible to utilize alternative sources of biomass such as invasive plants, agricultural and sawmills residues for the creation of new "green" composites. Biocomposites produced with lignocellulosic biomass as an alternative to conventional materials, are attracting attention because they are renewable and cheaper but also because they fit perfectly into the policy of the "cascade utilization" of the resources.
1552: 159: 111: 318:. Strain improvement methods have led to strains capable of producing significantly more cellulases than the original QM6a isolate; certain industrial strains are known to produce up to 100g of cellulase per litre of fungus, thus allowing for maximal extraction of sugars from lignocellulosic biomass. These sugars can then be fermented, leading to bio-ethanol. 132:. It is derived from 3-4 monomers, the ratio of which varies from species to species. The crosslinking is extensive. Being rich in aromatics, lignin is hydrophobic and relatively rigid. Lignin confers structural integrity to plants. Lignin is so heterogeneous and so recalcitrant that its value is almost exclusively measured as a fuel. 984: 148:
is a homopolymer of glucose. It is very poorly soluble in most solvents, so glucose is extracted through chemical and biological breakdown achieved by cellulolytic enzymes. This extraction is made easier by the fact that the strands of cellulose are integrated into, but not covalently attached to the
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Lignocellulosic biomasses has been considered in the production of biocomposites materials such as particle panels, wood-plastic composites, and cement/geopolymer wood composites. Even though the production of biocomposite materials rely mostly on wood resources, in less forest-covered countries or
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source of energy in the long run. However depending on the source of biomass, it will not be carbon neutral in the short term. For instance if the biomass is derived from trees, the time period to regrow the tree (on the order of decades) will see a net increase in carbon dioxide in the
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upon the combustion of lignocellulosic ethanol. However, if woody material from annual crop residue is used, the fuel could be considered carbon-neutral. Aside from ethanol, many other lignocellulose-derived fuels are of potential interest, including
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stability and structural robustness to the cell walls of the plants. This robustness or "recalcitrance" is attributable to the crosslinking between the polysaccharides (cellulose and hemicellulose) and the lignin via
283:, and the phenols and phenylpropanols functionalities of the lignin. To extract the fermentable sugars, one must first disconnect the celluloses from the lignin, and then use acid or enzymatic methods to 142:
component of the lignin. This makes it difficult to extract the sugars necessary for conversion to biofuels. Next to cellulose hemicellulose is the second most abundant source of carbohydrates in a plant.
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GĂŒleç, Fatih; Parthiban, Anburajan; Umenweke, Great C.; Musa, Umaru; Williams, Orla; Mortezaei, Yasna; Suk‐Oh, Hyun; Lester, Edward; Ogbaga, Chukwuma C.; Gunes, Burcu; Okolie, Jude A. (12 October 2023).
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Saladini, Fabrizio; Patrizi, Nicoletta; Pulselli, Federico M.; Marchettini, Nadia; Bastianoni, Simone (December 2016). "Guidelines for emergy evaluation of first, second and third generation biofuels".
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One barrier to the production of ethanol from biomass is that the sugars necessary for fermentation are trapped inside the lignocellulose. Lignocellulose has evolved to resist degradation and to confer
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Christopher M. Fellows, Trevor C. Brown, William O.S. Doherty (2011). "Lignocellulosics as a Renewable Feedstock for Chemical Industry: Chemicals from Lignin". In Rashmi Sanghi, Vandana Singh (ed.).
26:, the lignin-rich component of sugarcane, is a form of lignocellulosic biomass. Its combustion helps to power the sugar mill. In this photograph, the bagasse is under the blue plastic. Location: 295:, or wood sugar. Unlike hexoses such as glucose, pentoses are difficult to ferment. The problems presented by the lignin and hemicellulose fractions are the foci of much contemporary research. 505:
P. Alvira; E. Tomas-Pejo; M. Ballesteros; M. J. Negro (2010). "Pretreatment Technologies for an Efficient Bioethanol Production Process Based on Enzymatic Hydrolysis: A Review".
308:, as well as genetic-engineering-based strain improvement to allow the fungus to simply be placed in the presence of lignocellulosic biomass and break down the matter into 304:, known for its cellulolytic abilities. Multiple avenues are being explored including the design of an optimised cocktail of cellulases and hemicellulases isolated from 570:"Progress in lignocellulosic biomass valorization for biofuels and value‐added chemical production in the EU : A focus on thermochemical conversion processes" 92:
are crops with a high yield of lignocellulosic biomass produced as a raw material for the production of second-generation biofuel; examples include switchgrass (
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Some chemicals could be obtained from lignocellulosic biomass. Almost all are derived from the sugars obtained by hydrolysis of the cellulose component.
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A large sector of research into the exploitation of lignocellulosic biomass as a feedstock for bio-ethanol focuses particularly on the fungus
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Many crops are of interest for their ability to provide high yields of biomass. Some can be harvested multiple times each year. These include
855:"Rapid repurposing of pulp and paper mills, biorefineries, and breweries for lignocellulosic sugar production in global food catastrophes" 985:"Biofuels turn to fungus - Interview with Frédéric Monot and Antoine Margeot, Applied Chemistry and Physical Chemistry Division at IFPEN" 1434: 138:
is composed of branched polysaccharides. A particular problem is that hemicellulose is covalently linked to lignin, usually through
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E. Palmqvist; B. Hahn-Hagerdal (2000). "Fermentation of Lignocellulosic Hydrolysates. II: inhibitors and Mechanisms of Inhibition".
1015:"Top Value Added Chemicals from Biomass Volume I—Results of Screening for Potential Candidates from Sugars and Synthesis Gas" 853:
Throup, James; GarcĂ­a MartĂ­nez, Juan B.; Bals, Bryan; Cates, Jacob; Pearce, Joshua M.; Denkenberger, David C. (2022-01-01).
224:, has a long history as a source of energy. Since the middle of the 20th century, the interest of biomass as a precursor to 1502: 64:. Virgin biomass includes plants. Waste biomass is produced as a low value byproduct of various industrial sectors such as 41:), so called lignocellulosic biomass. It is the most abundantly available raw material on the Earth for the production of 1089: 953:"Breaking the Biological Barriers to Cellulosic Ethanol: A Joint Research Agenda. Report from the December 2005 Workshop" 349:
Wyman, Charles E.; Dale, Bruce E.; Elander, Richard T.; Holtzapple, Mark; Ladisch, Michael R.; Lee, Y. Y. (2005-12-01).
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Lignocellulose consists of three components, each with properties that pose challenges to commercial applications.
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Barbara A. Tokay "Biomass Chemicals" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim.
800:"Recent advances in removal of lignin from paper industry wastewater and its industrial applications – A review" 1186: 1532: 1522: 1449: 959: 165:
is a so-called energy crop, being highly efficient (fast-growing) at turning solar radiation into biomass
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Y. Sun, J. Cheng (2002). "Hydrolysis of Lignocellulosic Materials for Ethanol Production: a Review".
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the newly freed celluloses to break them down into simple monosaccharides. Another challenge to
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D. M. Alonso; J. Q. Bond; J. A. Dumesic (2010). "Catalytic Conversion of Biomass to Biofuels".
27: 1033:"Sustainable Green Composites: Value Addition to Agricultural Residues and Perennial Grasses" 644: 396:
Zhou, Chun-Hui; Xia, Xi; Lin, Chun-Xiang; Tong, Dong-Shen; Beltramini, Jorge (2011-10-17).
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Lignocellulosic biomass can be broadly classified as virgin biomass, waste biomass, and
1581: 1555: 1356: 1181: 1169: 1075: 882: 835: 772: 737: 672: 300: 1403: 491: 456: 102:. The biofuels generated from these energy crops are sources of sustainable energy. 1476: 1368: 1054: 917: 886: 874: 839: 827: 819: 777: 759: 715: 694:"Extraction and modification of hemicellulose from lignocellulosic biomass: A review" 658: 522: 460: 425: 417: 378: 370: 255: 241: 1586: 1408: 1319: 1159: 1044: 935: 909: 866: 815: 811: 767: 749: 705: 650: 629: 607: 577: 549: 518: 514: 487: 452: 409: 366: 362: 94: 1252: 1517: 1379: 1329: 692:
Lu, Yuchan; He, Qiao; Fan, Guozhi; Cheng, Qunpeng; Song, Guangsen (2021-01-01).
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Horst H. Nimz, Uwe Schmitt, Eckart Schwab, Otto Wittmann, Franz Wolf "Wood" in
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Carroll, Andrew; Somerville, Chris (June 2009). "Cellulosic Biofuels".
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Nagarajan, Vidhya; Mohanty, Amar K.; Misra, Manjusri (2013-03-04).
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is the high percentage of pentoses in the hemicellulose, such as
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Haq, Izharul; Mazumder, Payal; Kalamdhad, Ajay S. (2020-09-01).
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Zeng, Yining; Himmel, Michael E.; Ding, Shi-You (2017-11-30).
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linkages. Ester linkages arise between oxidized sugars, the
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U.S. Department of Energy Office of Science (June 2006).
738:"Visualizing chemical functionality in plant cell walls" 45:. It is composed of two kinds of carbohydrate polymers, 128:
is a heterogeneous, highly crosslinked polymer akin to
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is an attractive route to fuels that supplements the
797: 899: 204:Lignocellulosic biomass is the feedstock for the 1568: 442: 1430:Bioconversion of biomass to mixed alcohol fuels 183:, which is a source of the readily fermentable 117:is one form of hemicellulose found in hardwood. 735: 626:Ullmann's Encyclopedia of Industrial Chemistry 395: 1083: 647:Green Chemistry for Environmental Remediation 691: 677:: CS1 maint: multiple names: authors list ( 1037:ACS Sustainable Chemistry & Engineering 1090: 1076: 199: 1435:Bioenergy with carbon capture and storage 1048: 771: 753: 709: 581: 228:fuels has increased. To be specific, the 153: 982: 600:Renewable and Sustainable Energy Reviews 220:Lignocellulosic biomass, in the form of 157: 109: 18: 105: 1569: 618: 53:, and an aromatic-rich polymer called 1071: 914:10.1146/annurev.arplant.043008.092125 793: 791: 731: 729: 574:Biofuels, Bioproducts and Biorefining 1503:Cellulosic ethanol commercialization 344: 342: 983:Monot, Frederic; Margeot, Antoine. 187:and the lignocellulosic by-product 13: 788: 726: 14: 1598: 339: 1551: 1550: 1024: 1007: 976: 944: 928: 893: 859:Food and Bioproducts Processing 846: 685: 638: 149:lignin-hemicellulose component. 902:Annual Review of Plant Biology 816:10.1016/j.biortech.2020.123636 698:Green Processing and Synthesis 590: 560: 533: 519:10.1016/j.biortech.2009.11.093 498: 471: 436: 389: 367:10.1016/j.biortech.2005.01.010 232:of lignocellulosic biomass to 194: 1: 1097: 492:10.1016/S0960-8524(99)00161-3 457:10.1016/S0960-8524(01)00212-7 333: 179:. The premier energy crop is 37:refers to plant dry matter ( 7: 1533:Issues relating to biofuels 1523:Energy return on investment 628:2005, Wiley-VCH, Weinheim. 321: 215: 10: 1603: 742:Biotechnology for Biofuels 655:10.1002/9781118287705.ch18 612:10.1016/j.rser.2016.07.073 130:phenol-formaldehyde resins 1546: 1508:Energy content of biofuel 1490: 1422: 1338: 1229: 1105: 871:10.1016/j.fbp.2021.10.012 755:10.1186/s13068-017-0953-3 1482:Thermal depolymerization 1455:Industrial biotechnology 940:10.1002/14356007.a04_099 634:10.1002/14356007.a28_305 402:Chemical Society Reviews 1450:Fischer–Tropsch process 1440:Biomass heating systems 206:pulp and paper industry 200:Pulp and paper industry 989:IFP Energies nouvelles 804:Bioresource Technology 355:Bioresource Technology 166: 154:Dedicated energy crops 118: 31: 28:Proserpine, Queensland 711:10.1515/gps-2021-0065 161: 113: 22: 649:. pp. 561–610. 289:biomass fermentation 176:Miscanthus giganteus 106:Chemical composition 1538:Sustainable biofuel 995:on January 27, 2018 260:gamma-valerolactone 240:. Biomass can be a 507:Bioresour. Technol 480:Bioresour. Technol 445:Bioresour. Technol 414:10.1039/C1CS15124J 301:Trichoderma reesei 247:Earth's atmosphere 167: 119: 76:, straw etc.) and 32: 1577:Biological matter 1564: 1563: 1477:Sabatier reaction 1050:10.1021/sc300084z 513:(13): 4851–4861. 408:(11): 5588–5617. 361:(18): 1959–1966. 312: 1594: 1554: 1553: 1398:Pongamia pinnata 1092: 1085: 1078: 1069: 1068: 1063: 1062: 1052: 1028: 1022: 1021: 1019: 1011: 1005: 1004: 1002: 1000: 991:. Archived from 980: 974: 973: 971: 970: 964: 958:. 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Index


Bagasse
Proserpine, Queensland
biomass
biofuels
cellulose
hemicellulose
lignin
energy crops
agriculture
corn stover
bagasse
forestry
saw mill
paper mill
Energy crops
Panicum virgatum
elephant grass

Xylan
lignin
phenol-formaldehyde resins
hemicellulose
ferulic acid
cellulose

Miscanthus
poplar
Miscanthus giganteus
sugarcane

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