摘要
采用管式炉在750~900~C内进行了草浆黑液半焦水蒸气气化实验,考察了温度、苛化剂TiO:对气体产物及固体产物的影响;采用热重分析仪在850~C下进行了半焦的水蒸气气化实验,探究了TiO_(2)对半焦热失重特性的影响。结果表明:在750~900~C内,TiO_(2)的添加使得气体产物中CO_(2)增加约5%、H:减少约5%,碳转化率上升约10%,产气热值下降约7%;TiO_(2)可避免气化过程中熔融物的生成;随着温度的升高,固体产物中无机盐的种类未发生变化;TiO_(2)与半焦中的Na_(2)CO_(3)反应生成Na_(2)O·nTiO_(2),与Na_(2)SiO_(3)结合生成Na_(2)TiSiO_(5),改变了元素Na与si的存在形态。
The steam gasification of wheat straw black liquor char(BLC)was studied in a laboratory-scale tube furnace at temperature from 750~C to 900℃.The impacts of temperature and causticizing agent TiO_(2) on characteristics of gas and solid product during gasification process were investigated.Influence of TiO_(2) on weight loss characteristics of BLC was also studied by thermo gravimetric analyzer at temperature 850℃.Results showed that at temperature from 750~C to 900℃,with TiO_(2) addition,the relative concentration of CO_(2) increases by about 5%while the relative concentration of H_(2) decreases by about 5%in gas product,at the same time the gas heating value reduces by about 7%;however,carbon conversion rate increases by about 10%without melting of char in the gasification process;temperature has no significant effect on the composition of the solid product.Furthermore,TiO_(2) changes the partition of Na and Si in char.TiO_(2)not only reacts with Na_(2)CO_(3) to form Na20.nTiO_(2),but also combines with Na_(2)SiO_(3) to generate Na_(2)TiSiO_(5).
作者
王贵金
袁洪友
郭大亮
周肇秋
阴秀丽
吴创之
Wang Guijin;Yuan Hongyou;Guo Daliang;Zhou Zhaoqiu;Yin Xiuli;Wu Chuangzhi(CAS Key Laboratory of Renewable Energy,Guangzhou Institute of Energy Conversion,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100039,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2014年第1期150-154,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(51176195)
'十二五'国家科技支撑计划资助项目(2012BAA09B03)
关键词
草浆黑液
碱回收
直接苛化
水蒸气气化
Wheat straw black liquor
Alkali recovery
Direct causticization
Steam gasification
