Pyrolyse (IPA: /paɪˈrɒlɪz/) is a technical term used to describe a process of thermal decomposition without oxygen, which leads to the creation of new substances. The word originates from the Greek words pyr, meaning fire, and lysis, meaning decomposition. The spelling of the word is based on the British spelling of the term, which differs from the American spelling, pyrolyze. The correct pronunciation of the term is pie-roll-eyes, and it is commonly used in the fields of chemistry, engineering, and materials science.
Pyrolyse is a chemical process that involves the decomposition or transformation of organic compounds by the action of heat in the absence or limited presence of oxygen. Derived from the Greek words "pyr" meaning fire and "lysis" meaning to break apart, pyrolyse literally translates to "breaking apart by fire."
In this process, the organic material undergoes thermal degradation, resulting in the formation of simpler compounds such as gases, liquids, and char. The temperature range at which pyrolysis occurs is typically between 200°C and 800°C, although it can vary depending on the type of material being pyrolyzed.
Pyrolyse is commonly used in various industries and applications. For instance, it is utilized in the production of biofuels, where biomass materials like wood chips, agricultural waste, or algae are subjected to pyrolysis to generate bio-oil, biochar, and gases. These products can then be further processed or utilized as energy sources.
In addition to fuel production, pyrolyse is also employed in the field of chemistry and materials science. It is used to decompose complex polymers into simpler compounds, allowing for the recovery of valuable components or the production of new materials. Furthermore, it plays a crucial role in the manufacturing of specific chemicals, such as activated carbon, which are utilized in diverse applications including water treatment, air purification, and gas adsorption.
Overall, pyrolyse is a chemical process that employs heat to break down organic materials, leading to the formation of simpler compounds or valuable products for various industrial applications.
The word "pyrolyse" originates from the combination of two Greek roots: "pyro" meaning "fire" and "lysis" meaning "breakdown" or "separation". In this context, "pyrolyse" refers to a process of thermal decomposition or degradation of organic materials in the absence of oxygen, typically resulting in the production of char, gas, oil, or other byproducts. The term was first coined in the late 19th century combining these two Greek elements to describe the specific scientific process.