铜盐改性活性炭去除养殖场中的硫化氢

养殖场恶臭气体带来的环境污染日益受到人们的重视,它的治理已成为亟待解决的问题.通过高温水热化学改性与硫酸铜溶液浸渍联合对活性炭进行改性,在自制的固定床吸附装置中,考察了改性活性炭在不同条件下吸附养殖场中硫化氢的效果.结果表明,低温对物理吸附有利,但是对化学吸附不利,温度升高化学吸附增强,但同时物理吸附减弱,在80℃时两种吸附达到最佳平衡状态;随着空速增加,气体流速也增大,H2S分子在固定床中的停留时间缩短,吸附容量也随之减小.进气浓度在150～850 mg/m3范围内,改性活性炭对H2S的吸附能力随着浓度增加逐渐降低且穿透时间也缩短.同时,通过BET、FTIR（傅里叶变换红外光谱分析）、TPD（程序升温脱附）和Boehm滴定酸碱官能团等方法对改性前后活性炭进行表征,认为活性炭孔隙结构、官能团种类及数量和表面酸碱性对活性炭吸附H2S的能力有重要影响.

Removal of H2S Derived from Livestock Farm on Activated Carbon Modified by Copper Sulfate

At present, the malodorous gases as a main environmental problem derived from livestock farm have been taken seriously. Meanwhile, it is urgent to eliminate the odor pollution. The combination of high-pressure hydrothermal method and impregnation CuSO4 method is used to modify the raw activated carbon. The adsorption performance of H2S derived from livestock farm on modified activated carbon （MAC） has been investigated at different conditions in self-made fixed bed. The results show that, lower temperature makes for H2S physical adsorption on MAC, but it against chemical adsorption on it. The ability of H2 S chemical adsorption improves with the inereasing temperature, at the same time, the ability of H2S physical adsorption weakens. The optimal adsorption temperature is 80℃, which balances the chemical adsorption and physieal adsorption on MAC. The gas flow rate goes up with the space velocity increases. The time that H2 S stays in fixed bed is shortened and the H2 S adsorption capacity on MAC declines as well. The H2 S removal efficiency and breakthrough time on MAC decreases along with the increase of the HaS concentration in the range of 150-850 mg/ma. Moreover, the physical and chemical structures of raw activated carbon and MAC have been characterized by FTIR, TPD, Boehm methods. The results demonstrate that the pore structure of the activated carbon, the types of carbon functional groups and the surface basic of activated carbon have significant influence on the H2 S adsorption ability on activated carbon.