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Kim, Yong Hwan
Enzyme and Protein Engineering Lab.
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DC Field Value Language
dc.citation.endPage 5031 -
dc.citation.number 16 -
dc.citation.startPage 5021 -
dc.citation.volume 12 - Lee, Jun Gyeong - Lee, Shinjae - Lee, Hojeong - Kurisingal, Jintu Francis - Han, Seung Hyun - Kim, Yong Hwan - An, Kwangjin - 2023-12-21T13:48:00Z - 2023-12-21T13:48:00Z - 2022-06-24 - 2022-08 -
dc.description.abstract The valorization of waste lignin for the production of high value-added chemicals is energetically and environmentally important. In this study, a new catalytic process was developed to produce raw materials for nylon production utilizing 100% of waste lignin emitted from industrial processes. Guaiacol, extracted from technical lignin, was converted to phenol through a hydrodeoxygenation reaction over carbon-supported MoO2 catalysts. The extracted lignin oil served as a carbon source to prepare lignin-derived porous carbons possessing an interconnected porous structure with a large pore size and volume via a nanocasting method. The high dispersion of MoO2 deposited on the porous carbon support enables a high guaiacol conversion (98.4%) and high phenol selectivity (73.7%) compared to those of a typical activated carbon support. The resulting phenol was selectively converted to cyclohexanone or cyclohexanol, depending on the controlled hydrogenation environments over carbon-supported Pd catalysts. The remaining solid residue during lignin extraction was also used as a carbon support to load Pd catalysts. The produced cyclohexanone and cyclohexanol were further converted to caprolactam and adipic acid, the main reagents used to produce nylon-6 and nylon-6,6 fibres, respectively. This process was demonstrated using real kraft and Klason lignin released from industry. The mass of guaiacol produced from 20 g of kraft lignin was 0.07 g, yielding either 0.032 g caprolactam or 0.043 g adipic acid, with a total yield of 0.15-0.25%. This study sheds light on utilizing waste lignin as a resource by producing not only guaiacol raw material for the production of high value-added nylon, but also a carbon support used for catalytic conversion. -
dc.identifier.bibliographicCitation CATALYSIS SCIENCE & TECHNOLOGY, v.12, no.16, pp.5021 - 5031 -
dc.identifier.doi 10.1039/d2cy00522k -
dc.identifier.issn 2044-4753 -
dc.identifier.scopusid 2-s2.0-85131839041 -
dc.identifier.uri -
dc.identifier.wosid 000807024800001 -
dc.language 영어 -
dc.publisher ROYAL SOC CHEMISTRY -
dc.title Complete utilization of waste lignin: preparation of lignin-derived carbon supports and conversion of lignin-derived guaiacol to nylon precursors -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Chemistry, Physical -
dc.relation.journalResearchArea Chemistry -
dc.type.docType Article; Early Access -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordPlus MESOPOROUS CARBON -
dc.subject.keywordPlus ACID -
dc.subject.keywordPlus HYDRODEOXYGENATION -
dc.subject.keywordPlus CYCLOHEXANONE -
dc.subject.keywordPlus VALORIZATION -
dc.subject.keywordPlus PHENOL HYDROGENATION -
dc.subject.keywordPlus CHEMICALS -
dc.subject.keywordPlus CATALYSTS -
dc.subject.keywordPlus KRAFT LIGNIN -


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