Transformation of chlorine in NaCl-loaded Victorian brown coal during the gasification in steam

• Published in: Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology
• Main Author: Zhang S.; Asadullah M.; Hocking R.; Lin J.-Y.; Li C.-Z.
• Format: Article
• Language: English
• Published: Science Press 2012
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872475490&doi=10.1016%2fs1872-5813%2813%2960005-5&partnerID=40&md5=8760e74c4ff0efdd30937d8117f20adc

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.