摘要
煤化学链气化制合成气是一种资源利用率高、环境污染低、节能环保的新型气化技术,而高效载氧体的设计开发是化学链气化技术的关键。本文以铜矿石和赤泥为原料采用挤出滚圆法制备R-Cu-10M(蒙脱石质量分数为10%)复合金属载氧体,实现载氧体颗粒内粉末的物理均匀混合、颗粒一次成型以及活性组分间的协同效应。围绕反应温度、氧煤比、水蒸气输入量三个关键操作变量,测试了R-Cu-10M载氧体与褐煤气化反应特性。表征结果表明,R-Cu-10M载氧体具有较好的还原性,赤泥与铜矿石中Cu-Fe金属间的协同效应有助于晶格氧释放以及还原性的提升。R-Cu-10M载氧体与褐煤发生气化反应的最佳温度为950℃,在氧煤比为3∶1、水蒸气通量为0.08 mL/min的最优工况下,合成气产量可以达到50 mmol/g载氧体,合成气选择性和碳转化率分别为75.9%和71.2%。
Coal chemical looping gasification(CCLG) is a promising gasification technology for coal utilization with high resource utilization rate, energy saving and environmental protection properties. Development of suitable oxygen carriers and optimization of operating conditions for CCLG are the keys for the coal conversion and syngas production. In this study,R-Cu-10 M bi-ore oxygen carrier prepared by the extrusion-spheronization method using red mud and copper ore as raw materials was tested for CCLG. The effects of the reaction temperature, oxygen carrier to coal(O/C) ratio and steam addition amounts were systematically evaluated by reaction tests combing with various analytical methods. The characterization results showed that the synergistic effect between Cu and Fe metals contributed to its good oxygen release ability and reducibility. The optimal gasification condition was 950℃ with oxygen carrier-to-coal mass ratio of 3:1 and water vapor rate of 0.08 mL/min. Syngas yield of 0.05 mol/g, as well as 75.9% syngas selectivity and 71.2% carbon conversion were achieved.
作者
刘思琦
何方
赵坤
赵海波
黄振
魏国强
杨文
LIU Si-qi;HE Fang;ZHAO Kun;ZHAO Hai-bo;HUANG Zhen;WEI Guo-qiang;YANG Wen(College of Chemistry and Bioengineering,Guilin University of Technology,Guilin 541004,Guangxi,China;CAS Key Laboratory of Renewable Energy,Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《新能源进展》
2021年第5期394-401,共8页
Advances in New and Renewable Energy
基金
国家重点研发计划项目(2018YFB0605402)。
关键词
煤
化学链气化
合成气
载氧体
coal
chemical looping gasification
syngas
oxygen carrier
