榆木焦负载纳米TiO_2光催化剂的制备及其脱除单质汞的试验研究  

Preparation of Elm Char/Nano-TiO_2 Photocatalyst and Experimental Studies on the Removal of Elemental Mercury

作　　者：谭增强[1] 刘豪[1] 邱建荣[1] 曾汉才[1] 刘子红[1] 

机构地区：[1]煤燃烧国家重点实验室(华中科技大学),湖北省武汉市430074

出　　处：《中国电机工程学报》2010年第29期37-41,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50525619;50976041;50721005)~~

摘　　要：采用溶胶-凝胶法制备了榆木焦负载纳米TiO2的新型光催化材料,在固定床反应器上采用汞在线分析仪研究了N2气氛下榆木焦/纳米TiO2对单质汞的吸附氧化脱除特性,探讨了紫外光照、氧气、水蒸气等条件对除汞性能的影响。结果表明,在紫外光照射下,榆木焦/纳米TiO2具有良好的氧化除汞性能,氧气和水蒸气的加入因强氧化性自由基的产生对脱汞均有促进作用;在一定的催化剂质量和烟气流量比及紫外光照下,加入10%氧气脱汞效率可以达到86%。The sol-gel method was used to prepare elm char/TiO2 photocatalytic materials.The characteristic of elemental mercury adsorption by the elm char/TiO2 was evaluated on a fixed bed reactor in N2 atmosphere.The effects of ultraviolet light（UV）,oxygen and water vapor on Hg0-removal efficiency were discussed.The results show that the elm char/TiO2 performed a high removal efficiency to mercury under UV,the oxygen and water vapor are positive to mercury removal.The mercury removal efficiency can reach 86% with 10% oxygen in the atmosphere under UV light.

关 键 词：生物质焦 纳米TIO2 光催化脱除 汞 溶胶-凝胶法 

分 类 号：O643[理学—物理化学]