Thermochemical conversion of lignocellulosic bio-waste via fast pyrolysis in molten salts

被引：29

作者：

Yang, Yuhan ^{[1
]}

Hu, Hongyun ^{[1
]}

Yang, Fu ^{[1
]}

Tang, Hua ^{[1
]}

Liu, Huan ^{[1
]}

Yi, Baojun ^{[2
]}

Li, Xian ^{[1
]}

Yao, Hong ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China

[2] Huazhong Agr Univ, Coll Engn, Wuhan 430070, Peoples R China

来源：

FUEL | 2020年 / 278卷

关键词：

Bio-waste; Lignocellulose; Molten salt pyrolysis; Nitrate/nitrite salt; Nitration; CATALYTIC FAST PYROLYSIS; MUNICIPAL SOLID-WASTE; BIOMASS PYROLYSIS; SAWDUST PYROLYSIS; SEWAGE-SLUDGE; HEATING RATE; CELLULOSE; GASIFICATION; HEMICELLULOSE; TEMPERATURE;

D O I：

10.1016/j.fuel.2020.118228

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This study, for the first time, investigated the volatiles emission and thermochemical conversion mechanism of bio-waste during pyrolysis in molten salts (NaNO3-KNO3-NaNO2) at 300 degrees C. Cations of molten salts acted as catalysts while anions participated in the pyrolysis reaction. Compared with salt-free pyrolysis, more bio-waste was decomposed in molten salts, to produce more than 14 times the mass of gaseous products and twice the mass of liquid products. Furthermore, the thermochemical conversion behavior of typical biomass constituents, i.e. cellulose, hemicellulose and lignin, was also distinguished. The results suggested that lignin was most easily pyrolyzed to form numerous liquid acids, some nitrated aromatic compounds and more CO, H-2. In contrast, the decomposition of cellulose was certainly restricted while more significant effects of anions were found in hemicellulose cracking by generating nitrogen-containing heterocyclic rings and amines. Besides, interactions among different biomass constituents were confirmed to affect the generation of bio-waste pyrolysis products.

引用

页数：7

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