Performance and mechanism of bamboo residues pyrolysis: Gas emissions, by-products, and reaction kinetics
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Dosyalar
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elseiver
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The performances and reaction kinetics of the bamboo shoot leaves (BSL) pyrolysis were characterized integrating thermogravimetry, Fourier transform infrared spectroscopy, and pyrolysis-gas chromatography/mass spectrometry analyses. The high volatiles and low ash, N, and S contents of BSL rendered its pyrolysis suitable for bio-oil generation. The main mass loss of BSL pyrolysis occurred in the devolatilization stage between 200 and 550 C. The peak temperatures of pseudo-hemicellulose, cellulose and lignin pyrolysis in BSL were 248.04, 322.65 and 383.51 C, respectively, while their average activation energies estimated by Starink method were 144.29,175.79 and 243.02 kJ/mol, respectively. The one-dimensional diffusion mechanism (f (alpha) = 1/(2 alpha)) best elucidated the hemicellulose reaction. The cellulose (f (alpha) = 0.74 (1 - alpha)[-ln (1 - alpha)]-13/37) and lignin (f (alpha) = 0.35 (1 - alpha)[-ln (1 - alpha)]-13/7) reactions were best described by the nucleation mechanisms. The estimated kinetic triplets accurately predicted the pyrolysis process. 619.3 C and 5 C/min were determined as the optimal pyrolytic temperature and heating rate. The C-containing gases were dominant among the non-condensable gases evolved from the pyrolysis. The NO(x )precursors (NH3 and HCN) were found more important than NO emission in pollution control. 2,3-dihydrobenzofuran, (1-methylcyclopropyl) methanol, heptanal, acetic acid, and furfurals were the main pyrolytic by-products. BSL-derived biochar is a relatively pure carbon-rich material with extremely low N and S content. The BSL pyrolysis yielded a promising performance, as well as value-added by-products to be utilized in the fields of bioenergy, fragrance, and pharmaceuticals.
Açıklama
This research was funded by the National Natural Science Foundation of China (No. 22006015 and 51608129) , Social Science and Technology Development Project of Dongguan (No.20211800904662) , Scienti fi c and Technological Planning Project of Guangzhou, China (No. 202103000004) , and the Natural Science Foundation of Guangdong Province, China (No. 2022A1515010825) . We would like to thank teacher Chunxiao Yang at the AnaIysis and Test Center of Guangdong University of Technology for her assistance with the TG-FTIR analysis.
Anahtar Kelimeler
Bamboo Shoot Leaves, Pyrolysis, TG-FTIR, Lignocellulosic Biomass, Co-Pyrolysis, PY-GC/MS
Kaynak
Science of the Total Environment
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
838
Sayı
Künye
Zhang, G., Feng, Q., Hu, J., Sun, G., Evrendilek, F., Liu, H., & Liu, J. (2022). Performance and mechanism of bamboo residues pyrolysis: Gas emissions, by-products, and reaction kinetics. Science of The Total Environment, 838, 156560.
