Volatile-char interactions during biomass pyrolysis: Cleavage of C-C bond in a β-5 lignin model dimer by amino-modified graphitized carbon nanotube.

Autor: Huang Y; Lab of Biomass Energy and Functional Carbon Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China., Liu S; Lab of Biomass Energy and Functional Carbon Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China., Zhang J; Lab of Biomass Energy and Functional Carbon Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China., Syed-Hassan SSA; Faculty of Chemical Engineering, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia., Hu X; School of Material Science and Engineering, University of Jinan, Jinan 250022, Shandong, China., Sun H; School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Western Australia 6027, Australia., Zhu X; School of Material Science and Engineering, Hanshan Normal University, Chaozhou 521041, China., Zhou J; Lab of Biomass Energy and Functional Carbon Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China., Zhang S; Lab of Biomass Energy and Functional Carbon Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China. Electronic address: s.zhang@njfu.edu.cn., Zhang H; Lab of Biomass Energy and Functional Carbon Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2020 Jul; Vol. 307, pp. 123192. Date of Electronic Publication: 2020 Mar 17.
DOI: 10.1016/j.biortech.2020.123192
Abstrakt: This study investigated the interactions between volatile and char during biomass pyrolysis at 400 °C, employing a β-5 lignin dimer and amino-modified graphitized carbon nanotube (CNT-NH 2 ) as their models, respectively. The results demonstrated that both -NH 2 and its carrier (CNT) facilitated the conversion of the β-5 dimer, which significantly increased from 9.7% (blank run), to 61.6% (with CNT), and to 96.6% (with CNT-NH 2 ). CNT mainly favored the breakage of C-O bond in the feedstock to produce dimers with a yield of 55.5%, while CNT-NH 2 promoted the cleavage of both C-O and C-C bonds to yield monomers with a yield up to 63.4%. Such significant changes in the pyrolysis behaviors of the β-5 lignin dimer after the introduction of CNT-NH 2 were considered to be mainly caused by hydrogen-bond formations between -NH 2 and the dimeric feedstock/products, in addition to the π-π stacking between CNT and aromatic rings.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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