含氚废气中杂质气体去除材料研制  

Preparation of Impurity Elimination Material for Inert Gas Containing Tritium

作　　者：杨勇[1] 王文华[1] 李佳懋 杜阳[1] 董亮[1] 成琼[1] 董兰[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《核化学与放射化学》2014年第B12期50-57,共8页Journal of Nuclear and Radiochemistry

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.

关 键 词：含氚惰性废气 杂质气体 去除 

分 类 号：O615.1[理学—无机化学]