摘要
开发高效规整填料,有利于降低CO2捕集过程的能耗和成本。文章在直径200 mm的填料塔中,使用氢氧化钠水溶液吸收空气中微量CO2的方法研究了金属板波纹规整填料的传质性能,测定了具有不同几何参数的规整填料的有效传质面积。实验结果表明:随着气液相流量的增加,有效传质面积逐渐增大,且气相流量的影响相对较大。当气液流量达到一定值时,有效传质面积会超过填料的比表面积。而填料几何参数对有效传质面积也有较大的影响。当波纹倾角α=30°,波纹齿顶角β=75°时,有效传质面积较大。而且α对有效传质面积的影响较β大。在同时考虑气液相流速的影响的基础上,文章提出了新的有效传质面积的关联式,计算值与实验值吻合较好。
It is beneficial to reduce the cost and energy consumption of CO2 capture to develop high efficient packings. In 200 mm packed tower, the mass transfer performance of metal sheet structured packings was studied by a process of trace CO2 absorption in the air with aqueous NaOH solution. The effective mass transfer area Ao of metal sheet corrugated structured packings with different geometry parameters was measured. The results show that with the liquid/gas flow rates increasing, A~ moves upwards and surpasses the specific area at a certain liquid/gas flow rate. The geometry parameters of packings also have a big impact on it. At corrugated angle c~ of 30~ and addendum angle/3 of 75 ~, Ao is the biggest. New correlations for Ae changed with the liquid/gas flow rates were proposed and the calculated results agree well with the experimental values.
出处
《化学工程》
CAS
CSCD
北大核心
2013年第10期13-16,共4页
Chemical Engineering(China)
基金
国家自然科学重点基金资助项目(51134017)
关键词
CO2吸收
规整填料
液相传质系数
有效传质面积
C02 absorption
structured packing
liquid phase mass transfer coefficient
effective mass transfer area
