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Evolution of Chemical Component and Physical Properties of Datong Long-Flame Coal After Superheated Water Vapor Pyrolysis by Chao Zhang; Yangsheng Zhao; Zijun Feng; Qiaorong Meng; Lei Wang is a Engineering article available to read on EtoBox.

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are used to overcome a series of problems with lowrank coal. The results of Guo et al suggested that drying treatment removed the moisture of low-rank coal, which could effectively reduce the latent heat of water evaporation during combustion. However, the hydrophilic oxygen-containing functional groups were not destroyed and would reabsorb water from the environment. Thermal treatment and hydrothermal upgrading significantly reduce moisture and volatile content in low-rank coals and inhibit moisture reabsorption . However, the high latent heat of water evaporation during thermal treatment compared to hydrothermal upgrading leads to its higher energy consumption. In addition, hydrothermal upgrading contributes to the removal of water-soluble inorganic substances from coal . Several researchers have studied the physicochemical properties of low-rank coal after upgrading. Wu et al.(Liu et al. 2016; found that the gradual decomposition of oxygen-containing functional groups and phenolic organic compounds in low-rank coals with increasing temperature during hydrothermal upgrading was the main reason for decreases in oxygen content and water reabsorption capacity. Xi et al. (Xi et al. 2

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Author

Chao Zhang; Yangsheng Zhao; Zijun Feng; Qiaorong Meng; Lei Wang

Publisher

Informa UK Limited

Published

2022

Language

EN

Field

Engineering (Physical Sciences)