What fuel do spaceships usually use?

Human urine can be used as fuel for spacecraft.

Phoenix News: Human excrement can be used as fuel for spacecraft! In the past, Russia had envisaged decomposing underwear used by astronauts with bacteria to produce methane, which was used as fuel for spacecraft. Inspired by this idea, NASA is currently conducting joint research and experiments with the American Advanced Fuel Research Corporation to convert human excrement and other garbage into energy at high temperature. This will cost 600,000 dollars now.

Generally speaking, burning organic molecules will combine with oxygen in the air to produce carbon dioxide and water. According to New Scientist magazine, they experimented with heating human urine and blood under anoxic conditions to decompose it into water and some combustible gases, and use them as fuel for space navigation, or turn them into vulgar materials or other substances. In addition, they also intend to use this method to produce chemicals that must be used in spacecraft.

Serio, a scientist from Advanced Fuel Research Company, said that when the temperature reaches 350 degrees Celsius, these human excreta will turn into liquid, and when the temperature rises to 6,000 degrees Celsius, they will turn into gas. Both forms can be the power source of the spacecraft.

Markhan, CEO of Advanced Fuel Research Corporation, said that this method, which is called "pyrolysis", can not only use human excrement, but also waste such as broken plastic bags. Although everyone's excrement has different characteristics, the new instrument will be able to dissolve them one by one.