What are the differences between the oils produced from pyrolysis of different waste plastics?

 Different plastics have different cracking reaction characteristics. Generally, the larger the branched substituent gene, the easier it is to decompose.

Polyethylene (PE) cracking oil, the main component is hydrocarbons, mainly straight-chain alkanes and olefins, usually has high stability and relatively low impurity content. The density of polyethylene cracking oil is relatively low, and the boiling point range is relatively narrow. Polyethylene cracking oil can be used as fuel oil for industrial boilers, power plants, etc. Due to its high carbon and hydrogen content, it has good combustion performance.

Polyethylene can also be used to produce polyethylene wax, etc.

Polypropylene (PP) cracking oil, the composition is also mainly hydrocarbons, but the molecular structure is slightly different from polyethylene cracking oil, and may contain a slightly higher proportion of branched alkanes and olefins. The density of polypropylene cracking oil is relatively low, and the boiling point is relatively narrow. Polypropylene cracking oil can also be used as fuel oil for industrial boilers, power plants, etc. Due to its high carbon and hydrogen content, it has good combustion performance. Propylene cracking oil can also be used to produce polypropylene wax, etc.

Polystyrene (PS) cracking oil, containing compounds with benzene ring structure, such as benzene, toluene, ethylbenzene, etc. Compared with polyethylene and polypropylene cracking oil, which have a higher aromatic hydrocarbon content, polystyrene cracking oil may have a slightly higher density, a relatively higher viscosity, and a wider boiling point range. In addition, due to the high aromatic hydrocarbon content in polystyrene cracking oil, it can be used to produce high-octane gasoline or as a chemical raw material, and can also be used to produce styrene monomer, etc.

In addition to hydrocarbons, polyvinyl chloride (PVC) cracking oil may also contain chlorine-containing compounds such as hydrogen chloride. Due to the presence of chlorine, its cracking process is relatively complicated and has a certain corrosiveness to the equipment. The density of polyvinyl chloride cracking oil may be slightly higher, and the boiling point range of polyvinyl chloride cracking oil may be wider. Due to the presence of chlorine, polyvinyl chloride cracking oil needs special treatment when used as fuel to reduce environmental pollution.

Zhengzhou Dingli New Energy Equipment Co., Ltd. is a manufacturer specializing in the production of pyrolysis machines. Due to the obvious differences in composition, physical properties and uses of the oil cracked from different plastics. In practical applications, it is necessary to select the appropriate plastic cracking oil according to the specific situation and carry out corresponding treatment and processing. If you have any equipment needs, please feel free to contact us by phone!