气体扩散法分离二氧化碳实验研究

随着碳13呼气检测实验的推广和普及,碳13同位素产品的市场需求呈上升趋势.为探索碳13同位素的工业化分离方法,开展以二氧化碳为介质分离碳同位素的气体扩散分离实验研究.根据二氧化碳的平均自由程,使用平均孔径55～65 nm的有机高分子多孔膜作为分离膜,并开发了单级分离装置.通过单级扩散分离实验,探究分离膜层数和膜前压强对...

Experimental Study on Carbon Dioxide Separation by Gas Diffusion

With the promotion and popularization of carbon-13 breath detection test,the market demand for carbon-13 isotope products is on the rise.In order to explore the industrial separation method of carbon-13 isotope,a gas diffusion separation experimental research using carbon dioxide as processing gas to separate carbon isotopes was carried out.According to the average free path of carbon dioxide,an organic polymer porous membrane with an average pore diameter of 55-65 nm was used as the separation membrane,and a single-stage separation device was developed.Through the single-stage diffusion separation experiment,the influence of the number of separation membrane layers and pre-membrane pressure on the membrane diffusion separation performance was studied.The results show that the gas diffusion separation device using organic polymer porous membrane has a separation effect on carbon dioxide,and the maximum concentration separation coefficient of organic polymer membrane diffusion separating carbon dioxide was 1.0049 under existing experimental conditions.On the basis of single-stage diffusion separation experiment,combined with the compressor and cascade design,multi-stage diffusion separation experiment will be further carried out to explore the application prospects of carbon-13 isotope separation by gas diffusion method.