摘要
在旋转填料床反应器中,以锌氨络合物与蒸汽为原料制得氧化锌前驱体,经煅烧后得到超细氧化锌产品。考察了超重力因子、气液比、蒸汽流量和温度等操作参数对产品收率的影响。结果表明,在超重力因子167.2,气液比1.14 kg/L,蒸汽流量30 L/h和蒸汽温度135℃的条件下,沉锌率较高,可达96.7%。氧化锌产品的透射电镜(TEM)表征结果表明,其形貌为近球状,平均粒径为45 nm。
In the high gravity rotating packed bed reactor, the zinc-ammonia complex solution reacted with steam to precipitate the precursor of zinc oxide, which was then calcinated into ultra-fine zinc oxide. The effects of gravity factor, gas-liquid ratio, steam flow rate and temperature on the efficiency of zinc precipitation were investigated. The results showed that the zinc precipitation could reach up to 96.7% under the conditions of gravity factor of 167.2, gas-liquid ratio of 1.14 kg/L, steam flow rate of 30 L/h and steam temperature of 135℃. Transmission electron microscope （TEM） results showed that the product had a near spherical morphology with an average particle size of 45 nm.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2012年第4期341-345,共5页
Chemical Reaction Engineering and Technology
基金
国家自然科学基金(20576128)
教育部重点实验室青年基金(20110401)
关键词
旋转填料床
超重力
氨法
氧化锌
沉锌率
rotating packed bed
high gravity
ammonia decomposition method
zinc oxide
zinc precipitation
