{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T09:42:21Z","timestamp":1785404541702,"version":"3.56.0"},"reference-count":62,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2026,7,16]],"date-time":"2026-07-16T00:00:00Z","timestamp":1784160000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52406245"],"award-info":[{"award-number":["52406245"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"award":["52406245"],"award-info":[{"award-number":["52406245"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Yunnan Province Students\u2019 Innovation and Entrepreneurship Training Program","award":["S202510674132"],"award-info":[{"award-number":["S202510674132"]}]},{"name":"Yunnan Province Students\u2019 Innovation and Entrepreneurship Training Program","award":["202510674086"],"award-info":[{"award-number":["202510674086"]}]},{"name":"Yunnan Fundamental Research Projects","award":["202301BE070001-035"],"award-info":[{"award-number":["202301BE070001-035"]}]},{"name":"Yunnan Fundamental Research Projects","award":["202501AT070357"],"award-info":[{"award-number":["202501AT070357"]}]},{"name":"Key Research and Development Program Project of Yunnan Provincial Department of Science and Technology","award":["202403AA080158"],"award-info":[{"award-number":["202403AA080158"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>High ash andsss urea formaldehyde (UF) resin contents in particleboard sanding powder (SP) have restricted the effective resource utilization of SP and make it a hazardous biomass material for particleboard enterprises. To achieve high-value resource utilization of SP while addressing its hazardous disposal issues, different HCl concentration-oriented deashing pretreatments of SP coupled with fast pyrolysis was proposed for producing value-added pyrolytic sugar levoglucosan (LG) and high-quality pyrolytic char. The results show that H+ ions released from HCl solution could effectively remove structural ash, likely by disrupting the chemical linkages between the structural ash and lignocellulosic matrix. An amount of 2 mol\/L HCl could achieve an over 95% removal rate of alkali and alkaline earth metals (AAEMs) in the ash while maintaining a low loss of polysaccharides. This considerably facilitated the glycosidic cleavage of cellulose into levoglucosan (LG), with the LG yield increasing from 2.18% of raw SP to 13.69% of 2 mol\/L HCl deashed SP. Interestingly, it was found that HCl washing of SP facilitated the co-production of value-added platform chemical acetic acid via acid-catalyzed hydrolysis of acetyl groups in UF resin attached to the xylose unit, with the yield increasing from about 7% of raw SP to over 11% of HCl deashed one. Specifically, 2 mol\/L HCl deashing pretreatment of SP significantly improved the quality of pyrolytic char with the ash content decreasing from 7.24% to 2.39% and fixed carbon content lifting from 54.08% to 76.04%, thus drastically improving the higher heating value (HHV) from 24.66% of raw SP-derived char to 30.05% of deashed SP-derived char. Moreover, the pyrolytic char CO2 gasification reactivity increased from 0.027 min\u22121 of raw SP-derived char to 0.034 min\u22121 of that derived from 2 mol\/L HCl deashed SP, approaching that of the widely used industrial charcoal fuel. Pyrolysis kinetic analysis indicates that deashing pretreatment of SP makes the formation of value-added platform chemicals and high-quality carbonaceous fuel proceed more easily at a lower activation energy (214.39 kJ\u00b7mol\u22121) than that of raw SP (245.81 kJ\u00b7mol\u22121). This study offers a novel approach for the synergistic production of value-added chemicals and high-quality carbonaceous fuel from biomass waste materials with high contents of ash and UF resin, providing a feasible strategy for the clean and high-value resource utilization of wood-based industrial residues.<\/jats:p>","DOI":"10.3390\/polym18141745","type":"journal-article","created":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T00:55:59Z","timestamp":1784249759000},"page":"1745","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Fast Pyrolysis of Deashed High-Urea-Formaldehyde Resin Biomass Waste for Platform Chemical and Carbonaceous Fuel"],"prefix":"10.3390","volume":"18","author":[{"given":"Xianfang","family":"Liao","sequence":"first","affiliation":[{"name":"School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China"},{"name":"State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming 650093, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haolin","family":"Li","sequence":"additional","affiliation":[{"name":"School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China"},{"name":"State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming 650093, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zijie","family":"Li","sequence":"additional","affiliation":[{"name":"School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China"},{"name":"State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming 650093, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuolin","family":"Deng","sequence":"additional","affiliation":[{"name":"School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China"},{"name":"State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming 650093, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ronghua","family":"Luo","sequence":"additional","affiliation":[{"name":"School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China"},{"name":"State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming 650093, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hang","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Metallurgical and Energy Engineering, Kunming University of Science and 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Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anqing","family":"Zheng","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Renewable Energy and Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China"},{"name":"School of Energy Science and Engineering, University of Science and Technology of China, Guangzhou 510640, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7737-0665","authenticated-orcid":false,"given":"Ke","family":"Jin","sequence":"additional","affiliation":[{"name":"Sinopec Research Institute of Petroleum Processing, Beijing 100083, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guoqiang","family":"Lv","sequence":"additional","affiliation":[{"name":"School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China"},{"name":"State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming 650093, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1007\/s12649-016-9578-1","article-title":"Fast Pyrolysis of Nitrogen-Rich Wood Waste Pretreated by Microwave-Assisted Glycerolysis","volume":"8","author":"Zheng","year":"2017","journal-title":"Waste Biomass Valorization"},{"key":"ref_2","first-page":"10","article-title":"Conditioning and Desorption of Pollutants of Syngas from Entrained Flow Gasification of Nitrogen-rich Wood Waste in Molten Salt, 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