What pressure is liquefied promethium gas fed to a burner?

Liquefied promethium gas is typically fed to a burner at a pressure of about 11 inches of water column (wc). This pressure is essential for ensuring that the gas is delivered efficiently to the burner for combustion.

Using this specific pressure allows for optimal flow rates, ensuring that the gas mixes adequately with air for complete combustion. Adequate pressure also helps in achieving the right flame characteristics and prevents issues such as incomplete combustion, which could lead to safety hazards or inefficiencies.

The other options, while reflecting measurements that could exist in various applications, do not align with the standard operational requirements for liquefied promethium gas in a burner setting. Therefore, the selection of 11" wc represents a balance between efficiency and safety in using this specific gas.