How much oil gas is generated during the pyrolysis of plastics？

The amount of oil-gas generated during the pyrolysis of plastics can vary depending on several factors, including the type of plastic, its composition, and the specific conditions under which the pyrolysis process is conducted. Here’s a general overview:

Typical Yield Ranges:

Oil Yield: Typically ranges from 60% to 80% by weight of the input plastic, depending on the type and conditions.

Gas Yield: The pyrolysis gas yield of different plastic types may vary, and the approximate yield is between 5%-15%.

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Factors Influencing Plastic Pyrolysis Oil Gas Yield:

Type of Plastic:

Different types of plastics produce different yields of oil and gas. For example:

Polyethylene (PE) and Polypropylene (PP): These are among the most commonly pyrolyzed plastics, producing high yields of hydrocarbons. Typically, around 70-85% of PE/PP can be converted into oil.

Polystyrene (PS): Yields approximately 75-85% oil.

Acrylonitrile-butadiene-styrene copolymer (ABS): The yield of pyrolysis oil is about 40%.

Paper mill scraps: The main components are organic matter such as cellulose, and the oil yield during pyrolysis is relatively low, generally around 20%-60%.

Agricultural mulch: The main component is PE, and the pyrolysis oil yield is about 70%-80%.

Aluminum-plastic composite products: Due to the presence of metallic aluminum and other components, the pyrolysis oil yield is relatively low, generally around 40%-50%.

It is not recommended to pyrolysis PET and PVC.

Polyethylene terephthalate (PET): PET will produce some harmful substances such as benzoic acid and biphenyl during pyrolysis, and the economic value of its pyrolysis products is relatively low, so pyrolysis treatment is not recommended.

Polyvinyl chloride (PVC): PVC will release harmful gases such as hydrogen chloride during pyrolysis, which will cause great harm to the environment and equipment, so pyrolysis treatment is not recommended.

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Process Conditions:

Temperature: Higher temperatures generally increase the yield of gases while reducing the liquid oil yield. The recommended pyrolysis temperature is between 260℃-320℃.

Residence Time: The time the material spends in the reactor affects product distribution.

Controlling these factors is of great significance for improving pyrolysis efficiency and the yield of target products.

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Flexibility and comprehensiveness of equipment

It is also important to choose high-quality pyrolysis equipment. DOING waste plastic pyrolysis equipment shows great flexibility in plastic input. It can adapt to the processing needs of various types of waste plastics, whether it is common packaging plastics in life or waste plastic scraps in industrial production, it can be used as input raw materials. In terms of pyrolysis process control, the equipment is equipped with an advanced automatic control system. It can accurately adjust parameters such as temperature, pressure and time according to different plastic types and preset pyrolysis targets to ensure efficient and stable operation of the pyrolysis process.

In short, the oil yield of plastic pyrolysis is affected by many factors. DOING waste plastic pyrolysis equipment has become an ideal choice for processing waste plastics and converting them into energy due to its many advantages. In the face of increasingly severe waste plastic pollution problems and energy crisis challenges, it provides an efficient, environmentally friendly and economical solution with broad application prospects and development potential.If you have a particular type of plastic or process condition in mind, I can look up more detailed information for you.