Specific molecular structure changes and radical evolution during biomass-polyethylene terephthalate co-pyrolysis detected by 13C and 1H solid-state NMR

被引：29

作者：

Ko, Kwang-Hyun ^{[1
]}

Sahajwalla, Veena ^{[1
]}

Rawal, Aditya ^{[2
]}

机构：

[1] Univ New S Wales, Sch Mat Sci & Engn, Ctr Sustainable Mat Res & Technol SMaRT, Sydney, NSW 2052, Australia

[2] Univ New S Wales, Mark Wainwright Analyt Ctr, Nucl Magnet Resonance Facil, Sydney, NSW 2052, Australia

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 170卷

关键词：

Co-pyrolysis; Cross-linking reaction; Radical; C-13; NMR; H-1; MACADAMIA NUT SHELL; THERMAL-DEGRADATION; CARBON; RELAXATION; CHARS; OIL;

D O I：

10.1016/j.biortech.2014.06.109

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Co-pyrolysis of biomass with polyethylene terephthalate (PET) was studied as a function of blend ratio and co-pyrolysis temperature by C-13 and H-1 solid-state nuclear magnetic resonance (NMR). The C-13 NMR spectra showed that upon heating to 400 degrees C in presence of the biomass, the formation of crystallites in PET was completely suppressed and that at higher temperatures there was increased formation and growth of the polycyclic aromatic hydrocarbons ( PAHs). This change in the PET degradation behaviour was attributed to the presence of radicals formed in char from biomass. The measurement of the H-1-T-1 relaxation enabled monitoring the changes in the concentrations of radicals formed, as a function of the blend ratios and the co-pyrolysis temperatures. It indicated that the increase in the radical concentrations correlated well with the increased degradation of the PET and growth of PAHs. (C) 2014 Published by Elsevier Ltd.

引用

页码：248 / 255

页数：8

共 50 条

[41] Layered metal(IV) phosphonate materials: Solid-state 1H, 13C, 31P NMR spectra and NMR relaxation
Sheikh, Javeed Ahmad
Bakhmutov, Vladimir I.
Clearfield, Abraham
MAGNETIC RESONANCE IN CHEMISTRY, 2018, 56 (04) : 276 - 284
[42] Structural and dynamic study of ethylene-vinyl alcohol copolymer gels by 1H pulse NMR and solid-state 13C NMR
Kanekiyo, M
Kobayashi, M
Ando, I
Kurosu, H
Amiya, S
MACROMOLECULES, 2000, 33 (21) : 7971 - 7976
[43] Insights into molecular packing of semicrystalline P3HT by variable temperature 1H relaxation and 13C solid-state NMR measurements
Nieuwendaal, Ryan
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2013, 245
[44] Changes in the chemical structure of municipal solid waste during composting as studied by solid-state dipolar dephasing and PSRE 13C NMR and solid-state 15N NMR spectroscopy
Pichler, M
Knicker, H
Kögel-Knabner, I
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (18) : 4034 - 4038
[45] Strategies for RNA Resonance Assignment by 13C/15N- and 1H-Detected Solid-State NMR Spectroscopy
Aguion, Philipp Innig
Marchanka, Alexander
FRONTIERS IN MOLECULAR BIOSCIENCES, 2021, 8
[46] Order parameters of unsaturated phospholipids in membranes and the effect of cholesterol: a 1H–13C solid-state NMR study at natural abundance
Dror E. Warschawski
Philippe F. Devaux
European Biophysics Journal, 2005, 34 : 987 - 996
[47] Solid-State 13C NMR and 1H CRAMPS Investigations of the Hydration Process and Hydrogen Bonding for Poly(vinyl alcohol) Films
Kenji Masuda
Hironori Kaji
Fumitaka Horii
Polymer Journal, 2001, 33 : 356 - 363
[48] Ageing of EPDM elastomers exposed to γ-radiation studied by 1H broadband and 13C high-resolution solid-state NMR
Palmas, P
Colsenet, R
Lemarié, L
Sebban, M
POLYMER, 2003, 44 (17) : 4889 - 4897
[49] 1H and 13C solution- and solid-state NMR investigation into wax products from the Fischer-Tropsch process
Speight, R. J.
Rourke, J. P.
Wong, A.
Barrow, N. S.
Ellis, P. R.
Bishop, P. T.
Smith, M. E.
SOLID STATE NUCLEAR MAGNETIC RESONANCE, 2011, 39 (3-4) : 58 - 64
[50] Solid-state 13C NMR and 1H CRAMPS investigations of the hydration process and hydrogen bonding for poly(vinyl alcohol) films
Masuda, K
Kaji, H
Horii, F
POLYMER JOURNAL, 2001, 33 (04) : 356 - 363

← 1 2 3 4 5 →