What is catalyst pyrolysis?

Catalytic pyrolysis is a promising technique to convert plastic waste into liquid oil and other value-added products, using a modified natural zeolite (NZ) catalyst. The modification of NZ catalysts was carried out by novel thermal (TA) and acidic (AA) activation that enhanced their catalytic properties.

What is a pyrolysis system?

Pyrolysis is the heating of an organic material, such as biomass, in the absence of oxygen. Biomass pyrolysis is usually conducted at or above 500 °C, providing enough heat to deconstruct the strong bio-polymers mentioned above.

What is the difference between pyrolysis and co-pyrolysis?

Co-pyrolysis is a process which involves two or more materials as feedstock. Many studies have shown that the use of co-pyrolysis is able to improve the characteristics of pyrolysis oil, e.g. increase the oil yield, reduce the water content, and increase the caloric value of oil.

Why do we need pyrolysis?

Pyrolysis is a necessary process for the combustion of most solid fuels. Pyrolysis of a given material can produce many different thermal degradation products, called pyrolysis products. It significantly contributes to the chemicals recovered from fire debris samples during the laboratory analysis.

What is an example of pyrolysis?

Notable examples include grilling, frying, toasting, and roasting. Another notable application of pyrolysis is when wood is placed in tar kins and subjected to high temperatures in order to obtain tar. The process of oil refining also exploits the process of pyrolysis.

What is two step pyrolysis?

In two-step pyrolysis, the temperature of second reactor (catalytic reactor) was kept at constant temperature (400 °C). As seen in Fig. 4, for both two pyrolysis systems, the gas yields gradually increased by increasing of the temperature.

What are the stages of pyrolysis?

Pyrolysis is influenced by many variables including substrate type, presence of oxygen or other chemicals, rate of temperature rise, and temperatures reached [35]. Pyrolysis commonly follows three main degradation mechanisms: random scission, side-group scission, and monomer reversion.