固态胺SO_2吸附-解吸循环特性  

Adsorption and desorption cycle characteristics of solid amine SO_2

作　　者：李珂珂 韩伟明[1] 李建锡[1] LI Ke-ke;HAN Wei-ming;LI Jian-xi(Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学环境科学与工程学院,云南昆明650500

出　　处：《中国环境科学》2018年第10期3704-3712,共9页China Environmental Science

基　　金：国家重点研发计划项目(2017YFC0210500)

摘　　要：采用新的固态胺吸附材料研究其对SO_2的吸附性能.针对几种不同种类及孔径的分子筛嫁接胺基合成固态胺吸附材料,研究了其对SO_2吸附规律,特别是研究了固态胺解吸再生的特性.研究结果表明固态胺具有较高的SO_2吸附量,经20次吸附-解吸循环,留在固态胺中的残余量较低.结果还表明,分子筛结构的种类和孔径对固态胺吸附SO_2的效果有重大影响,通常孔径较小的分子筛,吸附效果较差.但分子筛中SiO_2/Al_2O_3的提高可降低解吸后的残余量.研究CO_2,NO_x对固态胺吸附剂的影响规律,结果表明,CO_2对固态胺SO_2吸附基本无影响,NO_x则会干扰SO_2的吸附.通过对解吸残余量化学成分的研究表明,解吸残余量具有与液态胺热稳定物类似的组分.由于固态胺可以有较高的工作温度,因此固态胺将更易于循环再生.A new solid amine was prepared as adsorbent of SO2.For comprison,the adsorption efficiency of several kinds of solid amine adsorbents with different structure and pore size were investigated.In addition,the mechanism of SO2 adsorption and the properties of the desorbing were discussed.The results show that the solid amines have a high SO2 adsorption capacity.The residual amount remaining in the solid amine is measured to be low after 20 times of adsorption-desorption cycles.The desorption of SO2 was significantly affected by the type of molecular sieve structure and pore size of the solid amines.The adsorption efficiency is decreased by reducing the pore size of molecular sieve.However,the residual of SO2 was decreased with the increase of SiO2/Al2O3 content in solid amine.The effects of CO2 and NOx on the solid amine SO2 adsorption were also studied.The results showed that CO2 had little effect on the adsorption of SO2 in the solid amine,but the adsorption of SO2 was interfered by NOx.Investigation on the chemical composition of desorption residuals show that the components of desorption residuals of the solid amine adsorbent is similar to that of the liquid amine thermal stabilizers.Because of its high operating temperature,the solid amines could be easily regenerated.

关 键 词：分子筛 吸附剂 液态胺 烟气脱硫 固态胺 

分 类 号：X701[环境科学与工程—环境工程]