The byproducts of plastic pyrolysis include fuel oil, carbon black, and syngas. Each of these byproducts has specific uses and applications in various industries.
Fuel Oil: The fuel oil produced from plastic pyrolysis is a valuable product that can be used in various sectors. It is primarily utilized as a fuel source in boilers, furnaces, and other industrial heating applications. Additionally, it can be refined further to produce diesel, which is used in engines and generators. The quality and usability of the fuel oil depend on the purity and type of plastic waste used in the pyrolysis process.
Carbon Black: Carbon black, another byproduct of plastic pyrolysis, has a calorific value comparable to high-grade coal. It can be used as a solid fuel in either pulverized or briquetted form. Furthermore, carbon black can serve as a low-cost adsorbent for treating industrial effluents. It is also a popular pigment choice for inks, coatings, and plastics due to its unique properties. The use of carbon black in various industries contributes to its economic viability as a byproduct of plastic pyrolysis.
Syngas: Syngas, a mixture of hydrogen and carbon monoxide, is produced during the plastic pyrolysis process. It can be used to provide energy for the pyrolysis reactor itself, and any excess syngas can be utilized to power other industrial processes. For example, syngas can be recycled as heating fuel to replace the heating oil. This not only reduces the reliance on external energy sources but also enhances the overall efficiency of the pyrolysis process.
The yield of these byproducts from waste plastic depends on several factors including the quality, type of waste plastic, and the specific pyrolysis technology employed. Typically, the process yields 30-80% oil, 20-30% carbon black, and 10-20% gas. The higher the purity and cleanliness of the waste plastic, the greater the yield of pyrolysis products.
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