Dear researchers,
The hard days continue caused by covid2019, but cars and scooters are driving down the street. Even a small scooter has an engine with a compression ratio of 10 or more. Assuming the polytropic index of air is 0.3, isn't the engine adiabatic compressing the absolute temperature of air to about twice? Is it possible to use such a mechanism for virus removal? If there is such a device, I think it can supply several liters of virus-free air per second. Of course, one may need a difficult technology like removing the lubricant.
Ryuzo Horiguchi (Kao Corporation)