酸性组分对 N,N′-二（2-羟丙基）哌嗪吸收/解吸 SO2性能的影响

摘要

Effects of SO3, HCl and HF acidic gases on the SO2 absorption and desorption performance of 1,4-bis(2-hydroxypropyl)piperazine (HPP) was investigated respectively by adding sulphuric acid, hydrochloric acid and hydrofluoric acid into the simulated solution. The results indicate that with increasing sulphuric acid, hydrochloric acid or hydrofluoric acid concentration in the absorption solution, the saturated absorption capacity and the absorption efficiency of SO2 decrease gradually, and the desorption ratio of absorption solution increases gradually. The effects of the same concentration of sulphuric acid and hydrochloric on the SO2 absorption performance of HPP solution show similar trends, and more pronounce than that of the same concentration of hydrofluoric acid. Adding 0.5 mol sulphuric acid or 1 mol hydrochloric acid into 1 mol absorption solution, the saturated absorption capacity reduces 0.47 mol⋅mol−1, while adding 1 mol hydrofluoric acid into 1 mol absorption solution, the saturated absorption capacity reduces 0.44 mol⋅mol−1. The errors of saturated absorption capacities between the theoretical calculation and experimental values are less than ±1%.%　　通过添加硫酸、盐酸和氢氟酸模拟研究了 SO3、HCl 和 HF 三种酸性气体对 N,N’-二(2-羟丙基)哌嗪(HPP)吸收解吸 SO2性能的影响。研究结果表明，随着吸收液中硫酸、盐酸和氢氟酸的浓度逐渐增大，吸收液的饱和吸收量和脱硫率逐渐降低，解吸率逐渐增大。添加相同浓度 H+的硫酸和盐酸对 HPP 吸收 SO2性能的影响效果基本相当，且大于相同浓度H+的氢氟酸。每摩尔吸收液中添加0.5 mol 硫酸或1 mol 盐酸，吸收液饱和吸收量减少0.47 mol⋅mol−1；每摩尔吸收液中添加1 mol 氢氟酸，饱和吸收量减少0.44 mol⋅mol−1，饱和吸收量的理论计算值与实验值偏差率小于±1%。