分子筛制氧机富氧气体组分分析

Component Analysis on Oxygen-rich Gas by Molecular Sieve Oxygen Generator

目的:通过对分子筛制氧机富氧气体进行组分分析,为改进变压吸附工艺或研发新型分子筛材料以获取高纯氧奠定基础。方法:采用气相色谱分析仪,测试分子筛制氧机富氧气体的氧气、氮气、氩气、二氧化碳、总烃的含量。结果:分子筛制氧机富氧气体的主要杂质为氮气和氩气,二氧化碳和总烃含量微小。随着氧气含量增加,氮气含量降低,氩气含量增加。当氧气体积分数为94.424 9%时,氩气体积分数为5.110 1%,氮气体积分数仅为0.464 3%。结论:影响分子筛制氧机制备的富氧气体氧含量的主要因素为空气中的氩气,常用的沸石分子筛很难吸附分离氩气,需要研发具有氧、氩分离性能的新型分子筛材料以获取高纯度氧气。

Objective To perform component analysis on the oxygen-rich gas by the molecular sieve oxygen generator in order to obtain high-purity oxygen by improving pressure swing adsorption process or developing new molecular sieve material. Methods A gas chromatographieanalyzer was used to determine the concentrations of the oxygen, nitrogen, argon, carbon dioxide and total hydrocarbon, Results The major impurities were nitrogen and argon, and increased argon and decreased nitrogen were found with the increase of oxygen. When the concentration of oxygen came to 94.424 9%, the concentrations of argon and nitrogen were 5.110 1% and 0.464 3% respectively. Conclusion It＇s difficult to eliminate argon from the oxygen-rich gas by common zeolite molecular sieve, and it＇s suggested to develop new molecular sieve material to obtain high-purity oxygen.