期刊
BIORESOURCE TECHNOLOGY
卷 312, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123591
关键词
Torrefaction; Pyrolysis; Straw; Potassium; Chlorine
资金
- National Natural Science Foundation of China [51906110]
- National Key Research and Development Project of China [2019YFD1100602]
- Natural Science Foundation of Jiangsu province, China [BK20190465]
- China Postdoctoral Science Foundation [2019 M650097]
The objective is to investigate the release characteristics of potassium (K) and chlorine (Cl) for torrefied wheat straw during a combined pyrolysis-combustion system. Powder and flake wheat straw samples were torrefied at different temperature of 200-300 degrees C. The basic characteristics of torrefied samples and the K and Cl release rates of torrefied samples and their char samples derived from pyrolysis at 400-800 degrees C were analyzed and characterized. The results indicated that release rate of Cl was significantly higher than that of K under the same torrefaction conditions. In order to keep most of K and Cl remaining in biochar as well as the volatiles were completely released, the pyrolysis temperature of 700 degrees C for pyrolysis-combustion system was suitable. The total release rate of K and Cl at the pyrolysis temperature of 700 degrees C both exhibited a change trend of decreasing first and then increasing with the increase of torrefaction severity.
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