固态胺SO2吸附-解吸循环特性

采用新的固态胺吸附材料研究其对SO₂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SO₂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SO₂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SO₂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SiO₂/Al₂O₃的提高可降低解吸后的残余量.研究CO₂，NO_x对固态胺吸附剂的影响规律，结果表明，CO₂对固态胺SO₂吸附基本无影响，NO_x则会干扰SO₂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.

Adsorption and desorption cycle characteristics of solid amine SO2

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 NO_x 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 byNO_x. 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.