Citation: YIN Yan-shan, WANG Ze-zhong, TIAN Hong, ZHANG Wei, HE Jin-qiao, LIU Liang, YAN Xiao-zhong. Evolution of mineral matter and carbonaceous structure during lignocellulosic municipal solid waste pyrolysis[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(2): 160-166. shu

Evolution of mineral matter and carbonaceous structure during lignocellulosic municipal solid waste pyrolysis

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School of Energy & Power Engineering, Key Laboratory of Efficient &Clean Energy Utilization of Hunan Province, Changsha University of Science &Technology, Changsha 410114, China

Corresponding author: YIN Yan-shan,
Received Date: 18 September 2014
Available Online: 3 December 2014
Fund Project: 国家自然科学基金(51206012) (51206012) 湖南省自然科学基金(12JJ4051) (12JJ4051) 能源高效清洁利用湖南省高校重点实验室开放基金(2011NGQ005) (2011NGQ005)

Two lignocellulosic municipal solid wastes including waste paper and camphor tree leaf were pyrolyzed at temperatures of 500~1 000 ℃ in a horizontal tube furnace. The mineral matter and carbonaceous structure of both municipal solid wastes were characterized by X-ray diffraction (XRD) and Raman spectroscopy, respectively. The evolution of mineral matter and carbonaceous structure during pyrolysis was investigated. The results demonstrate that the original mineral matter in waste paper and camphor tree leaf is principally calcite and weddellite, respectively. Weddellite can completely decompose to calcite below 500 ℃, and then turn to lime above 800 ℃. In addition, Raman spectroscopy is found to be considerably sensitive to the carbonaceous structure of municipal solid wastes. At relatively low temperatures, the macromolecules of municipal solid wastes are subjected to the condensation and depolymerization, resulting in an increase in the amount of isolated sp² carbon, thus the D1 band full width at half maximum (FWHM) and band area ratio I_D1/I_G increase with increasing pyrolysis temperature. In contrast, at relatively high temperatures, the D1 band FWHM and I_D1/I_G decrease, which is attributed to the increase of ordered sp² carbon. Consequently, the order of carbonaceous structure of both municipal solid wastes shows an initial decrease and then an increase with the increasing of pyrolysis temperature.
- lignocellulose,
- municipal solid waste,
- pyrolysis,
- mineral matter,
- carbonaceous structure,
- evolution
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