摘要
采用浸渍法制备铜金属氧化物改性活性炭吸附剂,采用同步热重差热分析（TG/DTA）、比表面分析（N2-BET）和X线光电子能谱（XPS）分析,考察吸附剂的净化性能。研究结果表明：最佳焙烧温度为300℃,最优体积空速为600 h 1;铜金属氧化物改性能显著增加活性炭对HCN的吸附性能,孔径为0.74~1.98 nm的微孔对HCN的吸附贡献较大,改性活性炭在325℃以内保持较优的热稳定性,CuO是吸附剂的主要活性组分,吸附HCN后,HCN被催化氧化分解为NH3,吸附剂的失活可能是HCN在脱除过程中生成的CuCN填充和覆盖了活性炭的微孔。
The activated carbon modified by copper oxide was prepared using impregnation method. The effects of roasting temperature and gas hourly space velocity on the purification performance were investigated by simultaneous measurements of thermogravimetry（TG） and differential thermal analysis（DTA）, specific surface area （Nz-BET） and X-ray photoelectron spectroscopy（XPS）. The results show that the optimum roasting temperature is 300 ℃ and the optimum volume space velocity is 600 h-1. The copper oxide significantly improves the adsorption performance of activate carbon as a HCN adsorbent. The micropore with radius of 0.74-1.98 nm makes primary contribution for adsorbing removal of HCN. The modified activated carbon maintains optimum thermal stability at temperatures lower than 325 ℃. CuO is the major species on adsorbent. After adsorption, HCN is converted to NH3 by the catalytic oxidation. Moreover, deactivation of the adsorbent is due to micropore filling and covering by the formation of CuCN along with the HCN removal.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第8期3294-3299,共6页
Journal of Central South University:Science and Technology
基金
国家高技术研究发展("863"计划)项目(2008AA062602)
云南省自然科学基金资助项目(14051184)
教育部科学技术研究重点项目(210202)
昆明理工大学分析测试基金资助项目(2010136)
关键词
氰化氢
改性活性炭
吸附净化
醋酸铜
hydrogen cyanide
modified activated carbon
adsorption purification
copper acetate
