Transformation behavior of potassium during pyrolysis of biomass

被引：18
作者：
Chen, Chen [1 ]
Luo, Zhongyang [1 ]
Yu, Chunjiang [1 ]
Wang, Tao [1 ]
Zhang, Hengli [1 ]
机构：
[1] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China
来源：
RSC ADVANCES | 2017年 / 7卷 / 50期
基金：
中国国家自然科学基金;
关键词：
GAS-PHASE; STRAW PYROLYSIS; WHEAT-STRAW; INORGANIC ELEMENTS; WOOD COMBUSTION; RELEASE; CHLORINE; GASIFICATION; FUEL; CL;
D O I：
10.1039/c7ra05162j
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The present work studied the transformation behavior of K involving the change of water-insoluble K and K2CO3 during biomass pyrolysis. KCl-loaded cellulose samples were used as fuels with the aim to determine the key reactions involved during K transformation. For comparision, KCl-loaded char samples were used as fuels to eliminate the effect of organics in cellulose on K transformation. The total amounts of K, and water-soluble K, Cl-, and CO32- in the fuels and in the obtained solid residues were quantified. The quantification results indicated that, during the pyrolysis of the KCl-loaded cellulose, the reactions between KCl and active functional groups which are produced from organic matter in cellulose during pyrolysis lead to a certain amount of water-insoluble K formed above 300 degrees C and the water-insoluble K was transformed into K2CO3 above 600 degrees C. The reactions between KCl and the organic matter in the cellulose were governed by both the availability of active functional groups produced during cellulose pyrolysis and the amount of KCl. The presence of O-2 promoted the generation of K2CO3.
引用
收藏
页码：31319 / 31326
页数：8
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