摘要
以活性氧化铝为载体,通过超声波辅助浸渍法制备一系列Fe-MnOx/γ-Al_(2)O_(3)吸附剂。考察该系列吸附剂的砷吸附性能,研究反应温度、O_(2)和SO_(2)对Mn改性后Fe_(2)O_(3)/γ-Al_(2)O_(3)砷吸附性能的影响。结果表明,Mn浸渍浓度会影响吸附剂的比表面积、孔径、氧化性能从而影响砷吸附性能,适量Mn的引入有利于吸附剂对气相砷的吸附,Mn-Fe摩尔比为0.5时吸附性能最佳;吸附温度升高增强了吸附剂的砷吸附性能,当温度过高时造成吸附剂表面结构恶化反而造成吸附性能的下降;SO_(2)会影响吸附剂表面性质促进对As_(2)O_(3)的吸附,O_(2)能补充反应消耗的晶格氧促进As_(2)O_(3)的氧化。
Using activated alumina as a carrier,a series of Fe-MnO_(x)/γ-Al_(2)O_(3) adsorbents were prepared by using the ultrasonic-assisted impregnation method.The arsenic adsorption performance of this series of adsorbents was investigated,and the effects of reaction temperature,O_(2) and SO_(2) on the arsenic adsorption performance of Mn modified Fe_(2)O_(3)/γ-Al_(2)O_(3) were studied.The results show that the Mn impregnation concentration can affect the specific surface area,pore size and oxidation performance of the adsorbent,thereby affecting the adsorption performance of arsenic.The introduction of an appropriate amount of Mn is beneficial to the adsorption of gas-phase arsenic;the adsorption performance is best when the Mn-Fe molar ratio is 0.5.The increase in the adsorption temperature enhances the arsenic adsorption performance of the adsorbent.When the temperature is too high,the surface structure of the adsorbent deteriorates and the adsorption performance decreases;SO_(2) may influence the surface properties of the adsorbent and promote the adsorption of As_(2)O_(3),and O_(2) can supplement the lattice oxygen consumed to promote the oxidation of As_(2)O_(3).
作者
刘翔
张月
邢佳颖
郭雨生
许桐
王春波
LIU Xiang;ZHANG Yue;XING Jiaying;GUO Yusheng;XU Tong;WANG Chunbo(Department of Energy Power&Mechanical Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2021年第15期5250-5257,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(51906070)
河北省自然科学基金(E2020502019)。
