燃料化学学报2017，Vol.45Issue(2)：147-156,10.
添加CaO对煤热解过程中砷和硫迁移转化的影响
Effects of adding CaO on the release and transformation of arsenic and sulfur during coal pyrolysis
摘要
Abstract
The pyrolysis experiments of YNZX coal with 10% CaO at 800-1 200℃ were conducted in a high frequency furnace. The effects of adding CaO on the release and transformation of arsenic and sulfur during pyrolysis have been investigated with the aid of sequential chemical extraction, XRD, SEM-EDX, and XPS. The results show that CaO can inhibit the release of arsenic and sulfur significantly. The retention rate to arsenic amounts to 41 . 19% at 800 ℃, and that to sulfur reaches 39 . 89% at 1 000 ℃, there is a negative correlation between the two retention rates. The formation of As-Ca compounds and CaS accounts for the decrease of release rates of arsenic and sulfur. The sulfur is enriched on the surface of CaO, which occupies more active adsorption sites after pyrolysis and inhibits the retention of arsenic, most sulfur is presented as sulfides in char and the amount of sulfites increases after adding CaO.关键词
热解/砷/硫/氧化钙/迁移转化Key words
pyrolysis/arsenic/sulfur/CaO/release and transformation分类
化学化工引用本文复制引用
秦跃强,陈雪莉,陈汉鼎,刘海峰..添加CaO对煤热解过程中砷和硫迁移转化的影响[J].燃料化学学报,2017,45(2):147-156,10.基金项目
The project was supported by the National Key Research and Development Project(2016YFB0600400-02).国家重点研发计划项目(2016YFB0600400-02)资助 （2016YFB0600400-02）
