多胺基针刺布的制备及其在H2S去除中的应用

Preparation of amino needle-punched cloth and its application in H2S removal

为了解决含硫化氢(H2S)废气的高效净化问题,直接以腈纶针刺布为原材料,通过一步反应制备了多胺基针刺布,测得其交换容量为5.9 mmol/g,并用红外光谱和热分析技术对其进行了表征;研究了碱液存在下多胺基针刺布对H2S的去除性能及气体流量、碱液浓度、增重率、氧含量和H2S浓度等因素的影响,结果表明碱液和多胺基针刺布的协同作用对气体中的H2S具有优异的去除性能.吸附饱和的多胺基针刺布可用碱液再生,且再生后性能无明显变化,在所设定实验条件下,针刺布处理容量和碱吸收容量分别稳定在30.6 mg/g和697.2 mg/g左右.

In order to solve the problem of high efficiency purification of waste gas containing hydrogen sulfide,amino needle-punched cloth was prepared directly from polyacrylonitrile needle-punched cloth by a one-step reaction,and its exchange capacity was measured to be 5.9 mmol/g.Infrared spectroscopy and thermal analysis methods were used to obtain its structure and thermo property.The performance of amino needle-punched cloth on hydrogen sulfide removal was studied in the presence of alkali solution.And the effects of gas flow,alkali concentration,weight gain ratio,oxygen content and hydrogen sulfide concentration were studied in detail.The results confirmed the excellent performance of the combined action of alkali solution and amino needle-punched cloth on hydrogen sulfide removal.The saturated amino needle-punched cloth could be regenerated with alkali solution,and its performance had no obvious change after many times regeneration.Under the set experimental conditions,the adsorption capacity of needle-punched cloth and alkali absorption capacity were stable at about 30.6 mg/g and 697.2 mg/g,respectively.