高真空多层绝热储罐中微热型复合吸附剂吸附氢气的实验研究

Novel Technique to Remove H_2 from Multilayer-Insulated High Vacuum Tank with Micro Thermo Composite Adsorbent

为解决氢气导致高真空多层绝热储罐夹层真空度下降和吸氢剂价格昂贵的问题,本文搭建了吸氢试验台,研究了廉价微热型吸氢剂CuO和CuO+C的吸氢性能;结果表明:C的加入使CuO吸氢活化温度下降了100℃,吸氢速率提高了26.2倍;测定了CuO+C的吸氢等温线,分析了多次吸氢过程,得知在低压时,吸氢产物对吸氢有促进作用,而在高压时,作用不明显;根据BDDT理论,该等温线属于第Ⅰ类吸附等温线。

A novel technique was developed to effectively adsorb the residue hydrogen, trapped in the insulation multi-layer of high vacuum tank, with inexpensive adsorbents, CuO and CuO ＋ C. The impact of the H2-adsorption conditions, including the addition of carbon powder, activation temperature of hydrogen, pressure and adsorption cycles of H2, on the H2-adsorption rate was experimentally investigated with lab-buih platform and theoretically evaluated on the basis of BDDT theory. The measured results show that addition of C-powder significantly reduces the adsorption activation energy of H2 by 100℃ ,and considerably increases the adsorption rate by 26.2 times. The calculated results reveal that the H2- covered surfaces of adsorbent enhance adsorption of H2 only at a rather low pressure, and that H2 adsorption isotherm, fitted with Langmuir isotherm equation, resembles Type-Ⅰ isotherm.