Process:

1. Air is compressed to a high pressure and cooled to a low temperature, causing it to liquefy.

2. The liquid air is then heated and allowed to evaporate slowly, with different gases evaporating at different temperatures.

3. Xenon gas has a boiling point of -108.1°C, so it evaporates early and can be collected.

Method 2: Adsorption on activated carbon

Process:

1. Air is passed through a column of activated carbon at high pressure.

2. Xenon gas is more strongly adsorbed onto activated carbon than other gases, so it is separated and can be collected.

Method 3: Gas chromatography

Process:

1. A sample of air is injected into a gas chromatograph.

2. The gases in the sample are separated based on their boiling points and chemical properties as they pass through the column.

3. Xenon gas can be detected and collected as it exits the column.