Transformation of chlorine in NaCl-loaded Victorian brown coal during the gasification in steam
MetadataShow full item record
This study is to examine the changes in Cl volatilizations and chemical forms in NaCl-loaded Victorian brown coal during gasification in steam at 800°C using Cl K-edge X-ray absorption near-edge structure (XANES) spectroscopy. The char samples were prepared in a novel one-stage fluidised-bed/fixed-bed quartz reactor at a fast heating rate. The samples were then collected and sealed in an argon-filled bag in order to minimise possible oxidation of char and Cl by air prior to analysis by XANES. Char-steam reactions were found to significantly affect the transformation of Cl, including the possible formation of chlorine-containing organic structures. On the other hand, volatile-char interactions during the gasification appeared to enhance the Cl retention and prevent the formation of organic chlorine compounds in chars.
Showing items related by title, author, creator and subject.
Wen, C.; Xu, M.; Yu, D.; Sheng, C.; Wu, Hongwei; Zhang, P.; Qiao, Y.; Yao, H. (2013)The formation of PM10 (particles less than or equal to 10 µm in aerodynamic diameter) during char combustion in both air-firing and oxy-firing was investigated. Three Chinese coals of different ranks (i.e., DT bituminous ...
Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part IX. Effects of volatile-char interactions on char–H2O and char–O2 reactivitiesZhang, Shu; Hayashi, J.; Li, Chun-Zhu (2011)Volatile-char interactions are an important consideration in the design and operation of a gasifier. This study aims to investigate the effects of volatile-char interactions on the in situ char–steam reactivity at 800 °C ...
Wang, M.; Roberts, D.; Kochanek, M.; Harris, D.; Chang, L.; Li, Chun-Zhu (2013)Raman spectroscopy has been widely used to study chemical structures of chars and further our understanding of their behaviour under combustion and gasification conditions. This paper explores the impact of devolatilisation ...