摘要
在常压双固定床反应器上研究电石渣高温协同捕集CO_2/SO_2过程的循环碳酸化-硫酸化特性。研究表明,随着停留时间增加,电石渣硫酸化转化率缓慢上升,碳酸化转化率则先上升而后由于直接硫酸化而下降,第1次循环在30min时取得最高碳酸化转化率,为0.66。随循环次数和SO_2浓度增加,碳酸化转化率减小,硫酸化转化率增加。缩短停留时间可提高电石渣循环碳酸化性能,从而提高电石渣协同捕集CO_2/SO_2性能。当反应气氛中无SO_2时,电石渣循环碳酸化性能优于石灰石;而当SO_2浓度为0.2%时,电石渣与石灰石的循环碳酸化性能并无明显差异,但电石渣硫酸化性能更优,总钙利用率更高,具有更好的循环碳酸化硫酸化性能。
In this work, the simultaneous CO2/SO2 capture behavior of carbide slag as a kind of typical industrial waste in carbonation-sulfation/calcination cycles was investigated in a twin fixed-bed reactor. The results show that the sulfation conversion of carbide slag increases with in- creasing residence time in the process of simultaneous carbonation-sulfation, whereas the carbonation conversion goes through a maximum and then drops due to direct sulfation of CaCO3. The maximum carbonation conversion is 0.66 in 30 min in the first cycle. The carbonation conversion of carbide slag decreases with increasing the cycle number and the SO2 concentration, whereas the sulfation conversion increases at the same reaction conditions. Reducing the residence time improves the cyclic carbonation conversion of carbide slag, moreover, the simultaneous CO2/SO2 capture capacity is also increased. The carbide slag shows higher simultaneous CO2/SO2 capture capacity at the same reaction conditions, compared with limestone.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2013年第5期973-976,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51006064)
高等学校博士学科点专项科研基金(No.20100131120055)
关键词
电石渣
协同捕集
碳酸化
硫酸化
carbide slag
simultaneous capture
carbonation
sulfation
作者简介
吴水木（1989-），男，博士研究生，主要从事燃烧污染物排放控制研究
