Catalytic conversion of lignin by immobilized Cu[H4]salen and [H2]salen complexes under hydrothermal conditions

• Autorzy: Zhou Xue-Fei

Identyfikatory

DOI

10.12841/wood.1644-3985.299.06

• Języki publikacji: EN

Abstrakty

EN

A comparative investigation was made of the effect of catalysis by immobilized Cu([H4]salen) on the hydrothermal conversion of organosolv lignin. The immobilization and hydrogenation of the complexes led to increased yield of liquid products compared with the corresponding unimmobilized and unhydrogenated complexes in catalytic conversion of lignin. In addition, the method of immobilization of the complexes affected the catalytic performance in lignin conversion, in which a higher yield of liquid products was obtained with the SB-immobilized complexes (ship-in-bottle method) than with the IM-immobilized complexes (impregnation method). The yield of liquid products obtained with Cu([H2]salen) at 250°C and 4 MPa O2 in water was 6.00%, compared with 16.80% and 22.08% respectively for Cu([H4]salen)/IM and Cu([H4]salen)/SB. Additionally, the addition of organic solvent had a marked effect on the catalytic performance of Cu([H4]salen), and the highest yield of liquid products (27.06%) was observed with Cu([H4]salen)/SB in water/methanol (80/20, v/v). The total yield of liquid products varied depending on temperature and oxygen pressure, and reached 46.01% under reaction conditions of 280°C and 6 MPa O2 in water/methanol (80/20, v/v). GC-MS analysis showed the main compounds in the liquid products to be phenols, with a yield of 32.16%. Other compounds included alcohols, ketones, aromatics, olefins, cycloalkanes, and alkanes. A mechanism for their formation was proposed based on the oxidation of a lignin model compound under hydrothermal conditions.

Słowa kluczowe

EN

organosolv lignin; Cu([H4]salen); Cu([H2]salen); hydrothermal pyrolysis

• Wydawca: Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
• Czasopismo: Drewno : prace naukowe, doniesienia, komunikaty
• Rocznik: 2020
• Tom: vol. 63, nr 205
• Strony: 81--91
• Opis fizyczny: Bibliogr. 27 poz., rys.

Twórcy

autor

Zhou Xue-Fei

• State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
• Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, China
• Key Laboratory of Advanced Energy Materials Chemistry of Ministry of Education of China, Nankai University, Tianjin, China
• Faculty of Chemical Engineering, Kunming University of Science and Technology (Corresponding affiliation), Kunming, China
• Key Laboratory for Solid Waste Management and Environment Safety of Ministry of Education of China, Tsinghua University, Beijing, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).