可再生循环利用Cu_xMn_((3-x))O_4尖晶石吸附剂脱汞性能  

Mercury Removal by Recyclable and Regenerable Cu_xMn_((3-x))O_4 Spinel-Type Sorbents

作　　者：杨应举 张保华 刘晶[1] 王震[1] 苗森 Yang Yingju;Zhang Baohua;Liu Jing;Wang Zhen;Miao Sen(State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China;Guangdong Shaoneng Group Company Limited,Shaoguan 512026,China)

机构地区：[1]华中科技大学煤燃烧国家重点实验室,武汉430074 [2]广东韶能集团股份有限公司,韶关512026

出　　处：《燃烧科学与技术》2017年第6期511-515,共5页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51376072);国家重点基础研究发展计划(973计划)资助项目(2014CB238904);湖北省自然科学基金资助项目(2015CFA046);华中科技大学研究生创新基金项目(5003120001)

摘　　要：采用溶胶-凝胶燃烧合成法制备了一系列Cu_xMn_((3-x))O_4尖晶石汞吸附剂.利用XRD和XPS等表征方法对吸附剂的晶相结构组成以及表面元素价态进行分析,研究Cu_xMn_((3-x))O_4尖晶石的脱汞性能.结果表明,CuMn_2O_4尖晶石在较宽的温度窗口范围(50~350,℃)内能维持95%,以上的脱汞效率.程序升温脱附实验结果表明,Hg0以化学吸附的方式吸附在CuMn_2O_4表面上.CuMn_2O_4尖晶石上吸附的汞主要以Cu-Hg汞齐合金和HgO的形式存在.CuMn_2O_4尖晶石在10次循环再生后仍能维持95%,以上的脱汞效率.A series of novel CuxMn(3-x)O4spinel-type sorbents were synthesized by low-temperature sol-gel autocombustion synthesis method.The crystal structure and surface chemical state of CuxMn(3-x)O4sorbents were characterized using X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS),respectively.Mercury removal performance of CuxMn(3-x)O4sorbents was tested in a fixed-bed reactor.The experimental results indicate that CuMn2O4sorbent exhibits over95%,mercury removal efficiency in a wide temperature window of50-350,℃.The results of temperature programmed decomposition desorption(TPDD)experiments show that Hg0is adsorbed on CuMn2O4surface in a chemical adsorption manner.The adsorbed mercury species exist in the forms of Cu-Hg amalgam and HgO on the sorbent surface.After ten adsorption-regeneration cycles,CuMn2O4still shows over95%,mercury removal efficiency.

关 键 词：汞 CuxMn(3-x)O4 尖晶石 吸附剂 

分 类 号：TK16[动力工程及工程热物理—热能工程]