naa a22 4500 510820026 CHVBK 20180411083526.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11814-012-0176-z doi (NATIONALLICENCE)springer-10.1007/s11814-012-0176-z Mineral behavior of low-temperature lignite ashes under gasification atmosphere [Elektronische Daten] [Fenghai Li, Jiejie Huang, Yitian Fang, Yang Wang] To investigate the mineral behavior of lignite ashes under gasification conditions, 450 °C Xiaolongtan lignite ash samples (XLT-LTA) treated at different temperatures or pressures under reducing atmosphere (H2/CO2=1: 1, volume ratio) have been examined by means of an SC-444 apparatus, a scanning electron microscope with an energy dispersive X-ray detector (SEM-EDX), and by X-ray diffraction (XRD). The results showed the sulfur content in the XLT-LTA to be much higher than that in ashes prepared at 815 °C, as a result of the release of sulfur dioxide during the oxidization of pyrite. With increasing temperature, the XLT-LTA particles gradually agglomerate and form partially molten surface entities with obvious apertures, and the content of iron and calcium in the congeries or molten parts increases due to the fusion of fine ash particles with the enrichment of iron and the formation of low-temperature eutectics of calcium and iron. An increase of pressure restrains the decomposition of calcite and muscovite, and promotes the formation of iron minerals (e.g., hercynite, cordierite, and sekaninaite) and orthoclase. The content of amorphous material also increases with increasing pressure. Korean Institute of Chemical Engineers, Seoul, Korea, 2012 Mineral Behavior nationallicence XLT Lignite nationallicence Gasification Condition nationallicence Temperature nationallicence Pressure nationallicence Li Fenghai School of Materials Science and Engineering, Henan Polytechnic University, 454003, Jiaozuo, China aut Huang Jiejie Institute of Coal Chemistry, Chinese Academy of Sciences, 030001, Taiyuan, China aut Fang Yitian Institute of Coal Chemistry, Chinese Academy of Sciences, 030001, Taiyuan, China aut Wang Yang Institute of Coal Chemistry, Chinese Academy of Sciences, 030001, Taiyuan, China aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/3(2013-03-01), 605-612 0256-1115 30:3<605 2013 30 11814 https://doi.org/10.1007/s11814-012-0176-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-012-0176-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Fenghai School of Materials Science and Engineering, Henan Polytechnic University, 454003, Jiaozuo, China aut NATIONALLICENCE 700 1- Huang Jiejie Institute of Coal Chemistry, Chinese Academy of Sciences, 030001, Taiyuan, China aut NATIONALLICENCE 700 1- Fang Yitian Institute of Coal Chemistry, Chinese Academy of Sciences, 030001, Taiyuan, China aut NATIONALLICENCE 700 1- Wang Yang Institute of Coal Chemistry, Chinese Academy of Sciences, 030001, Taiyuan, China aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/3(2013-03-01), 605-612 0256-1115 30:3<605 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer