摘要
采用均匀沉淀法制备纳米ZnO,以其作为低温脱除H2S的活性组分,考察了纳米ZnO粒径、空速、反应温度、氧分压等因素对纳米ZnO脱硫性能的影响,并对脱硫剂的结构进行了表征.结果表明:在常压、低温、氧分压较低的条件下,粒径越小脱硫性能越强,260℃焙烧制得的纳米ZnO脱硫剂具有高的脱硫活性, H2S可选择性地被氧化为单质S,转化率高达100%,脱硫活性时间是分析纯ZnO的40倍.尾气中未见SO2 产生.
With the method of averaging deposit for preparation of nanocrystalline ZnO used as the active components, the impact of the size of nanocrystalline ZnO and the reactive temperature and oxygen subpressure towards the desulfuring performance of nanocrystalline ZnO has been investigated. The result is demonstrated that the smaller the size is, the stronger the desulfuring capability is in the normal pressure and at the lower temperature and under the low oxide pressure. The nano desulfur agent obtained from calcinations at temperature 260 ℃ has very high desulfurization activity, H2S is oxidized into elemental S with selectivity. Its conversion rate is 100% and the active time of desulfurization is 40 times that of ZnO purely analysed. The product of SO2 is not observed in the terminal gas.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2005年第4期407-410,共4页
Materials Science and Technology
基金
国家自然科学基金资助项目(50478026)水质科学与水环境恢复工程北京市重点实验室开放研究基金资助项目.
关键词
纳米ZNO
低温
H2S
脱硫
nanocrystalline ZnO
low temperature
H2S
desulfurization
