二烷基磷酸酯离子液体对NH_(3)的高效吸收  

Efficient absorption of ammonia with dialkylphosphate-basedionic liquids

作　　者：史云岚 于游[1] 王思涵 朱霄[1] SHI Yunlan;YU You;WANG Sihan;ZHU Xiao(College of Chemistry and Chemical Engineering,Qufu Normal University,273165,Qufu,Shandong,PRC)

机构地区：[1]曲阜师范大学化学与化工学院,山东省曲阜市273165

出　　处：《曲阜师范大学学报（自然科学版）》2022年第2期92-98,共7页Journal of Qufu Normal University(Natural Science)

基　　金：国家自然科学基金重大项目(21890764);国家自然科学基金(21206085);山东省自然科学基金(ZR2020MB112)。

摘　　要：该文测定了不同温度(303.15~333.15 K)和不同压力(约0.1~0.6 MPa)下NH_(3)在5种二烷基磷酸酯离子液体中的溶解度[压力—温度—组分(pTx)数据].结果表明,NH_(3)的溶解度随温度的降低和压力的增加而增加.在离子液体中,咪唑阳离子环侧链长度越长,阴离子侧链长度越短,NH_(3)溶解度越高.根据NH;的溶解度数据,利用Peng-Robinson (P-R)状态方程计算得到了亨利定律常数,并由此计算出了溶解焓Δ_(sol)H,溶解熵Δ_(sol)S和溶液吉布斯自由能Δ_(sol)G等热力学性质.结果显示:Δ_(sol)H绝对值越高,对应的亨利定律常数越小,NH_(3)在离子液体中的溶解度越高.In recent years,ammonia(NH_(3))absorption has attracted much attention due to the serious environmental pollution induced by ammonia.In this paper,solubilities of ammonia(pressure-temperature-composition(pTx)data)in five dialkylphosphate-based ionic liquids(ILs),were determined at different temperature(303.15~333.15 K)and pressure(about 0.1~0.6 MPa).It was found that the solubilities of ammonia increased with temperature decreasing and pressure increasing.NH_(3) dissolution could be improved in ILs with longer side chain length in imidazolium ring of cations and shorter side chain length of anion.Moreover,based on NH_(3) solubilities data,Henry’s law constants can be obtained using Peng-Robinson(P-R)equation of state.Consequently thermodynamic properties including solution enthalpy Δ_(sol) H,solution entropy Δ_(sol) S and solution Gibbs free energy Δ_(sol) G were calculated.The results indicated that higher absolute values of Δ_(sol) H could be corresponding to the smaller Henry’s law constants and higher solubility of NH_(3) in I Ls.

关 键 词：NH_(3)吸收 离子液体 亨利定律常数 热力学性质 

分 类 号：O645.1[理学—物理化学]