In this video, the host attempts to liquefy nitrogen from the air, a challenge sponsored by Starbucks. The host starts by trying nitro cold brew for the first time and explaining how nitrogen makes it possible. They then use a cryo cooler to liquefy air, successfully creating 50 milliliters of liquid air.
The host then tries to isolate nitrogen from the atmosphere using a nitrogen membrane, which they connect to a compressor and a tank. After several attempts and modifications to the setup, they finally achieve 99.7% pure nitrogen.
The host then uses the cryo cooler to liquefy the nitrogen, but initially fails due to a high flow rate of nitrogen. After adjusting the flow rate and redesigning the setup, they successfully create liquid nitrogen.
To celebrate, the host makes homemade ice cream using the liquid nitrogen, which results in a smooth texture and flavor. The video ends with an explanation of how Starbucks uses nitrogen to create the unique texture of their nitro cold brew coffee.
Here are the key facts extracted from the text:
1. Nitrogen makes up 78% of the Earth's atmosphere.
2. Nitrogen is a fundamental building block of life.
3. The cryo cooler uses a cylinder of helium and a couple of pistons to cool the air.
4. The cryo cooler can reach temperatures of less than -200 degrees Celsius.
5. Liquid oxygen is paramagnetic, meaning it's attracted to permanent magnets.
6. A nitrogen membrane can be used to separate nitrogen from other gases in the air.
7. The nitrogen membrane contains hollow polymer fibers that allow oxygen, carbon dioxide, and water vapor to diffuse out faster than nitrogen.
8. To get pure nitrogen, a high pressure and slow flow rate are needed.
9. The pressure of the air compressor used in the experiment is about 10 atmospheres.
10. The oxygen level in the tank was measured to be less than 5%.
11. The experiment successfully isolated 99.7% pure nitrogen from the air.
12. The cryo cooler was used to liquefy the nitrogen.
13. The experiment also successfully made liquid nitrogen from the air.
14. Liquid nitrogen can be used to make homemade ice cream.
15. Starbucks generates nitrogen from the air for use in their nitro cold brew coffee.
16. Nitrogen bubbles are smaller than carbon dioxide bubbles, giving the coffee a creamier texture.
17. Nitrogen is inert, meaning it doesn't react with the coffee.
18. The nitrogen bubbles in the coffee can create a current that pushes them down around the outside of the glass.