摘要
为去除含氚惰性废气中的CH4、水气、O2等杂质气体，采用溶胶凝胶法制备了65％Ni-10％Cu-25％SiO2材料作为杂质气体消除材料，对材料进行XRD、SEM及程序升温还原表征，结果显示，少量Cu的加入增加了Ni的分散度，有助于稳定Ni的形态，避免Ni过早发生氧化。材料可以使Ar中的少量CH4、O2和水气得到有效的去除，在空速1000h。时Ar中φ=1％CH4和9=1％CO2重整时CH4去除率达到81．5％以上，对于Ar中φ=1％O2的去除率达到91．8％以上，对于Ar中φ=1％水气的去除率达到91．7％以上。实验还发现低浓度的CHt可以与水气及O2发生反应而去除，空速10000h。催化φ=1％水气和φ=1％CH4反应，CH4的去除率均高于80．7％；空速10000h^-1催化φ=0．67％CH4和φ=0．33％O2的反应，CH4的去除率均高于84．2％。
In order to eliminate CH4, steam, 02 in inert gas, 65%Ni-10%Cu-25%SiO2 is prepared as impurity eliminating material by sol-gel method. At space velocity 1 000 h^-1 ,when φ=1%CH4 and φ=1%CO2 in argon is reforming over the material, the conversion of CH4 is higher than 81.5%. At space velocity 1 000 h^- 1, when the material reacts with φ= 1%O2 in argon, the conversion of O2 is higher than 91.8%. At space velocity 1 000 h^-1,when the material reacts with φ= 1% steam in argon, the conversion of steam is higher than 91.7%. More experiments show that low concentration CH4 can also reform with O2 and steam over the material, and CH4 can be eliminated by the reforming reaction.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2014年第B12期50-57,共8页
Journal of Nuclear and Radiochemistry
关键词
含氚惰性废气
杂质气体
去除
inert gas containing tritium
impurity
elimination
