{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T15:06:15Z","timestamp":1782313575104,"version":"3.54.5"},"reference-count":42,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2020,2,17]],"date-time":"2020-02-17T00:00:00Z","timestamp":1581897600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Energies"],"abstract":"<jats:p>The depletion of fossil fuel reserves and the increase of greenhouse gases (GHG) emission have led to moving towards alternative, renewable, and sustainable energy sources. Lignin is one of the significant, renewable and sustainable energy sources of biomass and pyrolysis is one of the most promising technologies that can convert lignocellulosic biomass to bio-oil. This study focuses on the production and characterization of bio-oil from hardwood and softwood lignin via pyrolysis process using a bench-scale batch reactor. In this study, a mixed solvent extraction method with different polarities was developed to fractionate different components of bio-crude oil into three fractions. The obtained fractions were characterized by using gas chromatography and mass spectrometry (GCMS). The calculated bio-oil yields from Sigma Kraft lignin and Chouka Kraft lignin were about 30.2% and 24.4%, respectively. The organic solvents, e.g., toluene, methanol, and water were evaluated for chemical extraction from bio-oil, and it was found that the efficiency of solvents is as follows: water &gt; methanol &gt; toluene. In both types of the bio-oil samples, phenolic compounds were found to be the most abundant chemical groups which include phenol, 2-methoxy, 2-methoxy-6-methylphenol and phenol, 4-ethyl-2-methoxy that is due to the structure and the originality of lignin, which is composed of phenyl propane units with one or two methoxy groups (O-CH3) on the aromatic ring.<\/jats:p>","DOI":"10.3390\/en13040887","type":"journal-article","created":{"date-parts":[[2020,2,20]],"date-time":"2020-02-20T03:20:03Z","timestamp":1582168803000},"page":"887","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["Characterization of Fast Pyrolysis Bio-Oil from Hardwood and Softwood Lignin"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7574-9548","authenticated-orcid":false,"given":"Zahra","family":"Echresh Zadeh","sequence":"first","affiliation":[{"name":"School of Engineering, London South Bank University, London SE1 0AA, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8669-3722","authenticated-orcid":false,"given":"Ali","family":"Abdulkhani","sequence":"additional","affiliation":[{"name":"Department of Wood and Paper Sciences and Technology, Faculty of Natural Resources, University of Tehran, Karaj 1417466191, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Basudeb","family":"Saha","sequence":"additional","affiliation":[{"name":"School of Engineering, London South Bank University, London SE1 0AA, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,2,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"14","DOI":"10.1016\/j.renene.2014.08.041","article-title":"Production of biocrude-oil from swine manure by fast pyrolysis and analysis of its characteristics","volume":"79","author":"Jeong","year":"2015","journal-title":"Renew. Energy"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"74","DOI":"10.1016\/j.jaap.2015.02.019","article-title":"Biofuel production from catalytic microwave pyrolysis of Douglas fir pellets over ferrum-modified activated carbon catalyst","volume":"112","author":"Bu","year":"2015","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"656","DOI":"10.1016\/j.fuel.2015.02.071","article-title":"Combining Mo-Cu\/HZSM-5 with a two-stage catalytic pyrolysis system for pine sawdust thermal conversion","volume":"150","author":"Huang","year":"2015","journal-title":"Fuel"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1016\/j.renene.2017.06.076","article-title":"Biodiesel production from waste cooking oil via supercritical methanol: Optimisation and reactor simulation","volume":"124","author":"Aboelazayem","year":"2018","journal-title":"Renew. Energy"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"4934","DOI":"10.1016\/j.rser.2011.07.060","article-title":"Current and potential capabilities of biomass for green energy in Iran","volume":"15","author":"Hamzeh","year":"2011","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"373","DOI":"10.1016\/j.biortech.2019.01.055","article-title":"Overview of the recent advances in lignocellulose liquefaction for producing biofuels, bio-based materials and chemicals","volume":"279","author":"Kim","year":"2019","journal-title":"Bioresour. Technol."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"366","DOI":"10.1016\/j.rser.2010.08.003","article-title":"Thermochemical conversion of biomass to second generation biofuels through integrated process design-A review","volume":"15","author":"Damartzis","year":"2011","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1570","DOI":"10.1016\/j.biortech.2009.11.046","article-title":"An overview of second generation biofuel technologies","volume":"101","author":"Sims","year":"2010","journal-title":"Bioresour. Technol."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"669","DOI":"10.1016\/j.energy.2008.09.002","article-title":"Competition between first and second generation technologies: Lessons from the formation of a biofuels innovation system in the Netherlands","volume":"34","author":"Suurs","year":"2009","journal-title":"Energy"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"578","DOI":"10.1016\/j.rser.2009.10.003","article-title":"Production of first and second generation biofuels: A comprehensive review","volume":"14","author":"Naik","year":"2010","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1446","DOI":"10.1016\/j.rser.2015.07.058","article-title":"Technologies and developments of third generation biofuel production","volume":"51","author":"Alaswad","year":"2015","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1016\/j.jclepro.2014.01.006","article-title":"Review of evolution, technology and sustainability assessments of biofuel production","volume":"71","author":"Liew","year":"2014","journal-title":"J. Clean. Prod."},{"key":"ref_13","unstructured":"International Energy Agency (2011). Deploying Renewables 2011: Best and Future Policy Practice, OECD Publishing."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"48","DOI":"10.1016\/j.jaap.2018.05.002","article-title":"Valorizing municipal solid waste: Waste to energy and activated carbons for water treatment via pyrolysis","volume":"133","author":"Gopu","year":"2018","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_15","first-page":"3187","article-title":"Effects of the operating parameters on the production of bio-oil in the fast pyrolysis of Japanese larch","volume":"49","author":"Park","year":"2008","journal-title":"Chem. Eng. J."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/S1364-0321(99)00007-6","article-title":"Fast pyrolysis processes for biomass","volume":"4","author":"Bridgwater","year":"2000","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1016\/j.fuproc.2015.01.002","article-title":"A CFD study of biomass pyrolysis in a downer reactor equipped with a novel gas-solid separator-II thermochemical performance and products","volume":"133","author":"Yu","year":"2015","journal-title":"Fuel Process. Technol."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"116","DOI":"10.1016\/j.wasman.2015.01.022","article-title":"Reprint of: Pyrolysis technologies for municipal solid waste: A review","volume":"37","author":"Chen","year":"2015","journal-title":"Waste Manag."},{"key":"ref_19","unstructured":"Echresh, Z., Abdulkhani, A., and Saha, B. (2019, January 26). Analytical pyrolysis study of different lignin biomass. Proceedings of the 27th European Biomass Conference and Exhibition Proceedings, Lisbon, Portugal."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"32","DOI":"10.1039\/b810100k","article-title":"Thermochemical biofuel production in hydrothermal media: A review of sub- and supercritical water technologies","volume":"1","author":"Peterson","year":"2008","journal-title":"Energy Environ. Sci."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"89","DOI":"10.4155\/bfs.10.81","article-title":"Hydrothermal carbonization of biomass residuals: A comparative review of the chemistry, processes and applications of wet and dry pyrolysis","volume":"2","author":"Libra","year":"2011","journal-title":"Biofuels"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1080\/20426445.2019.1600814","article-title":"Water resistance improvement by polyethyleneimine of tannin-furfuryl alcohol adhesives","volume":"10","author":"Shirmohammadli","year":"2019","journal-title":"Int. Wood Prod. J."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"230","DOI":"10.1016\/j.jaap.2005.11.007","article-title":"Fast pyrolysis of rice straw, sugarcane bagasse and coconut shell in an induction-heating reactor","volume":"76","author":"Tsai","year":"2006","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"9797","DOI":"10.1016\/j.biortech.2010.07.094","article-title":"Pyrolysis kinetics and decomposition characteristics of pine trees","volume":"101","author":"Kim","year":"2010","journal-title":"Bioresour. Technol."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"859","DOI":"10.1007\/s12649-016-9643-9","article-title":"Physicochemical characterisation of technical lignins for their potential valorisation","volume":"8","author":"Abdelaziz","year":"2017","journal-title":"Waste Biomass Valoriz."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"469","DOI":"10.1002\/app.32428","article-title":"Isolation and chemical structure characterization of enzymatic lignin from populus deltoides wood","volume":"118","author":"Abdulkhani","year":"2010","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_27","first-page":"469","article-title":"The effect of combination enzymatic and advanced oxidation process treatments on the colour of pulp and paper mill effluent","volume":"118","author":"Karimi","year":"2010","journal-title":"Environ. Technol."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"819","DOI":"10.1016\/j.jenvman.2018.10.032","article-title":"Concurrent production of sodium lignosulfonate and ethanol from bagasse spent liquor","volume":"231","author":"Abdulkhani","year":"2019","journal-title":"J. Environ. Manag."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"170","DOI":"10.1016\/j.jaap.2008.03.007","article-title":"Mechanism study of wood lignin pyrolysis by using TG\u2013FTIR analysis","volume":"82","author":"Liu","year":"2008","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_30","first-page":"198","article-title":"Preparation and characterization of bio-oil from biomass","volume":"Volume 1","author":"Xu","year":"2011","journal-title":"Progress in Biomass and Bioenergy Production"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"5219","DOI":"10.15376\/biores.9.3.5219-5233","article-title":"Selective extraction of bio-oil from hydrothermal liquefaction of salix psammophila by organic solvents with different polarities through multistep extraction separation","volume":"9","author":"Yang","year":"2014","journal-title":"BioResources"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"495","DOI":"10.1016\/j.jaap.2018.07.016","article-title":"Pyrolysis of rapeseed oil cake in a fixed bed reactor to produce bio-oil","volume":"134","author":"David","year":"2018","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"590","DOI":"10.1021\/ef034067u","article-title":"Overview of applications of biomass fast pyrolysis oil","volume":"18","author":"Czernik","year":"2004","journal-title":"Energy Fuels"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"58","DOI":"10.1016\/j.indcrop.2012.12.002","article-title":"Organosolv lignin for biofuel","volume":"45","author":"Moral","year":"2013","journal-title":"Ind. Crops Prod."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1016\/j.jaap.2017.01.004","article-title":"Separation of chemical groups from bio-oil water-extract via sequential organic solvent extraction","volume":"123","author":"Ren","year":"2017","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"3","DOI":"10.1016\/S0165-2370(99)00005-4","article-title":"Principles and practice of biomass fast pyrolysis processes for liquids","volume":"51","author":"Bridgwater","year":"1999","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"487","DOI":"10.1016\/j.biombioe.2017.10.033","article-title":"De Fractionation of bio-oil produced from hydrothermal liquefaction of microalgae by liquid-liquid extraction","volume":"108","author":"Hu","year":"2018","journal-title":"Biomass Bioenergy"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"523","DOI":"10.1016\/j.jaap.2017.01.029","article-title":"Characteristics of softwood and hardwood pyrolysis in an ampoule reactor","volume":"124","author":"Asmadi","year":"2017","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_39","unstructured":"Abdulkhani, A., Mirshokraie, A., Karimi, A., and Hamzeh, Y. (2011, January 8\u201310). Chemical structure characterization of lignin from populus deltoides. Proceedings of the 16th International Symposium on Wood, Fiber and Pulping Chemistry (ISWFPC 2011), Tianjing, China."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1306","DOI":"10.1016\/j.egypro.2014.11.1087","article-title":"Overview of upgrading of pyrolysis oil of biomass","volume":"61","author":"Yang","year":"2014","journal-title":"Energy Proced."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"90","DOI":"10.1016\/j.biortech.2014.08.121","article-title":"Production, separation and applications of phenolic-rich bio-oil\u2014A review","volume":"178","author":"Kim","year":"2015","journal-title":"Bioresour. Technol."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"1376","DOI":"10.1016\/j.enconman.2009.01.001","article-title":"Overview of fuel properties of biomass fast pyrolysis oils","volume":"50","author":"Lu","year":"2009","journal-title":"Energy Convers. Manag."}],"container-title":["Energies"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1073\/13\/4\/887\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T08:58:28Z","timestamp":1760173108000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1073\/13\/4\/887"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,2,17]]},"references-count":42,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2020,2]]}},"alternative-id":["en13040887"],"URL":"https:\/\/doi.org\/10.3390\/en13040887","relation":{},"ISSN":["1996-1073"],"issn-type":[{"value":"1996-1073","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,2,17]]}}}