1. Effect of Volatile and Ash Contents in Coal on the Volatilization of Arsenic during Isothermal Coal Combustion
- Author
-
Chan Zou, Huimin Liu, Hefei Wang, Yue Zhang, and Chunbo Wang
- Subjects
inorganic chemicals ,Thermogravimetric analysis ,Volatilisation ,integumentary system ,Chemistry ,business.industry ,020209 energy ,General Chemical Engineering ,technology, industry, and agriculture ,Energy Engineering and Power Technology ,Coal combustion products ,chemistry.chemical_element ,02 engineering and technology ,respiratory system ,Combustion ,complex mixtures ,Isothermal process ,Fuel Technology ,Environmental chemistry ,0202 electrical engineering, electronic engineering, information engineering ,Coal ,business ,Arsenic - Abstract
The effects of the temperature, volatile content, and ash content on the volatilization kinetics of arsenic were discussed. Six Chinese coals were tested in an isothermal thermogravimetric reactor at 600–1300 °C. Sequential chemical extraction analysis was employed to know the speciation transformation of arsenic during coal combustion. Results show that the volatilization ratio of arsenic increases with the temperature, and most arsenic volatilizes between 700 and 1000 °C. The volatile content has a positive effect on the volatilization rate of arsenic in the initial stage of combustion. With the same level of ash content, high-volatile coals (>30%) own a larger volatilization rate of arsenic (0.55–0.6% s–1) than the low-volatile coals (
- Published
- 2017