Department of Chemical Engineering and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
J Hazard Mater. 2012 Aug 30;229-230:398-403. doi: 10.1016/j.jhazmat.2012.06.020. Epub 2012 Jun 20.
Six water-soluble amino acids (glycine, l-α-alanine, dl-alanine, β-alanine, proline and arginine) aqueous solutions were applied to remove SO(2) from SO(2)-N(2) system in this report. All the tested amino acids solutions were found to be excellent absorbents for SO(2) removal, and SO(2) saturation uptake of β-alanine solution was the highest under the same experimental conditions. The effects of amino acid concentration, SO(2) concentration, absorption temperature, desorption temperature and initial pH value of the absorbent on the removal of SO(2) were investigated with β-Ala solution. The experimental results showed that SO(2) saturation uptake increased with the increase in β-alanine solution and SO(2) concentration. Room temperature (20-30°C) was found to be optimal for SO(2) absorption. Additionally the SO(2) desorption capacity increased with increasing desorption temperature. The neutral environment pH value of 6.8 was found to be optimal for SO(2) removal. Ten continuous absorption-desorption cycles showed that the absorbent had an excellent regeneration performance. (13)C NMR and ultraviolet analyses offer ample evidence to speculate that the bonding between SO(2) and β-alanine was not covalent but some weak interactive forces, such as dispersion force, induction force, dipole-dipole force and hydrogen bond.
六种水溶性氨基酸（甘氨酸、l-α-丙氨酸、dl-丙氨酸、β-丙氨酸、脯氨酸和精氨酸）水溶液被应用于从 SO₂-N₂体系中去除 SO₂。所有测试的氨基酸溶液都被发现是去除 SO₂的优良吸收剂，并且在相同的实验条件下，β-丙氨酸溶液的 SO₂饱和吸收量最高。用β-丙氨酸溶液研究了氨基酸浓度、SO₂浓度、吸收温度、解吸温度和吸收剂初始 pH 值对 SO₂去除的影响。实验结果表明，SO₂饱和吸收量随着β-丙氨酸溶液和 SO₂浓度的增加而增加。室温（20-30°C）被发现是 SO₂吸收的最佳温度。此外，随着解吸温度的升高，SO₂的解吸能力增加。中性环境 pH 值 6.8 被发现是去除 SO₂的最佳 pH 值。十次连续的吸收-解吸循环表明，该吸收剂具有优异的再生性能。（13）C NMR 和紫外分析提供了充分的证据来推测 SO₂与β-丙氨酸之间的键合不是共价的，而是一些弱相互作用力，如分散力、诱导力、偶极力和氢键。
