What temperature range corresponds to Stage 1 pyrolysis?

• A. Up to 392 degrees
• B. 393-536 degrees
• C. 536-932 degrees
• D. 933 degrees and above

Answer: (A)

Stage 1 pyrolysis is characterized by low to moderate temperatures, where the process begins to break down organic materials without combustion. This stage generally occurs at temperatures up to approximately 392 degrees Fahrenheit. During this phase, materials such as wood or other organic substances start to thermally decompose, leading to the release of volatile substances and gases. This initial stage creates the foundational components for further pyrolytic processes, which can occur at higher temperatures.

The other temperature ranges indicate higher stages of pyrolysis or thermal degradation, where more complex interactions take place and different chemical compounds are formed.