Production of Biogasoline from Plastic Waste through Pyrolysis Using a Temperature-Controlled Condenser Technique

Area of Science:

• Chemical Engineering
• Environmental Science
• Materials Science

Background:

• Plastic waste poses significant environmental challenges due to its persistence and low recyclability.
• Pyrolysis offers a sustainable pathway to convert plastic waste into usable energy resources.

Purpose of the Study:

• To investigate the production of bio-oil from waste plastic bags using pyrolysis.
• To optimize fuel quality by controlling condensation temperatures and utilizing a biochar bed.

Main Methods:

• Fixed-bed pyrolysis of plastic bags at 500 °C.
• Temperature-controlled condensation ranging from -10 °C to -40 °C.
• Analysis of bio-oil composition using Gas Chromatography-Mass Spectrometry (GC-MS) and Fourier Transform Infrared Spectroscopy (FTIR).

Main Results:

• Bio-oil yield increased from 10.5% to 32.7% as condensation temperature decreased from -10 °C to -40 °C.
• Gas yield decreased from 27.4% to 5.4% with lower condensation temperatures.
• Lower temperatures favored the production of benzene and toluene, while higher temperatures yielded longer-chain hydrocarbons. Fuel properties approached gasoline standards.

Conclusions:

• Controlled condensation and biochar filtration are effective in upgrading pyrolysis oil from plastic waste.
• This process demonstrates a viable method for converting low-cost plastic waste into cleaner bio-oil fuel.
• The resulting bio-oil exhibits favorable characteristics for potential use as a gasoline substitute.