摘要
考察了纳米CuO直接沉淀法制备工艺对其脱硫活性和晶粒尺寸的影响,并利用XRD和TEM对脱硫剂的结构进行了表征。结果表明,所制备的纳米CuO为单斜晶系结构。原料浓度过低、沉淀剂用量小均不利于生成小尺度的纳米CuO。但加热条件下,前驱体有分解形成CuO趋势,晶粒尺寸略有增大;当n(OH-)∶n(Cu2+)=2.5∶1,原料浓度0.4mol/L,搅拌温度为25℃,300℃焙烧时获得的纳米CuO脱硫活性最好,其穿透时间可达640min,此时纳米CuO晶粒尺寸为11.8nm,颗粒的分散性较好;纳米CuO的脱硫活性受其晶粒大小的影响,但只有晶粒尺寸相差较大时,两者之间才呈现出明显的相关性。
It was inspected the influence of the direct precipitation preparation method on the desulfurization per- formance and grain size, and characterized the structure of desulfurizer using XRD and TEM. The results indi- cate that the nano CuO was for monoclinic system. Low raw material concentration and small precipitation dos- age are detrimental to the formation of the small scale of nano CuO. But the precursor have broken down tren ding to form copper oxide and grain size slightly increased under heating conditions; the nano CuO prepared un der optimum conditions（the molar ratio of n （OH ） ： n （Cu2＋） = 2.5 ： 1, raw material concentration was 0. 4mol/L, stirring temperature was 25℃, calcination temperature was 300℃） exhibits the best desulfurization performance with a H2S breakthrough time of 640min, the grain size of nano CuO was 11.8nm with a better particle dispersion; the grain size of nano CuO effects its desulfurization performance, but only when the grain size was large different, it will present a clear correlation between the grain size and desulfurization perform- ance.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第17期2533-2536,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51108144)
黑龙江省自然科学基金资助项目(E201146)
哈尔滨理工大学大学生创新创业训练计划省级资助项目(201210214015)
关键词
直接沉淀法
纳米CUO
室温脱硫
direct precipitation method
nano CuO
desulfurization at room temperature
