Moving from an oil-based energy economy to a alternative sources

The Tanaka Laboratory is working to develop practical diffusion scrubbers, which utilize the phenomenon of gas diffusion to collect and measure trace gases in the air. Q. To separate gases and particles, usually, filters are used. Filters remove particles from the air and then collect gases. But we try to separate the gases and particles at the same time. This is a collection tube for a diffusion scrubber we developed together with a company called Gastec. The white object you can see inside the tube is a porous Teflon tube. It looks as if it doesnt have any holes, but it has microscopic pores, through which gases can pass through the tube. If the dispersion scrubber method is used, theres no need to pass air through a liquid. The liquid is stored in the tube, and the air flows outside it. Gases in the air pass through the pores of the white tube, in accordance with the principle of diffusion, and are collected in the removal solution inside the tube. Particles pass through the collection tube. Consequently, when air flows, theres no resistance at all. Also, the amount of removal solution is only 1 ml. So the gas concentration in the removal solution becomes extremely high, enabling gases to be measured using simpler analysis methods than before. Q. For measurement, you just need an air sample, so you only need to collect a small volume of air. But to clean the air in a room, you need to treat a large volume of air. So this kind of collection tube isnt very effective at …

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