Work

Utilization Of Glass Waste For The Degradation Of Waste Plastic

The present project developed a method for the management of common variety of municipal solid waste glass and plastic. Waste glass material containing majority silica with other elements which after activation method can be converted to amorphous zeolite and acting as a catalyst for degradation. Activation involving the following steps:

• Pulverization
• Initial separation by cyclone
• Classification into specific size with the help of vibratory shaker
• final activation step involving thermal or chemical treatment.

In activation method the obtained glass powder was categorized into two kinds: fine (mesh size in between 100-200); and superfine (more than 200 mesh size). Thermal activation was achieved by calcine the powder temperature of about 4000C to about 5750C. Chemical modification process involved the use of fluoride reagent followed by final calcinations. Superfine thermally activated glass powder with calcinations temperature shows application as absorbent material in chromatography including column and thin layer; while chemically activated material can be used as skeleton and isomerization catalyst for polyolefin degradation.

The resultant chemically activated waste glass material thus obtained was used for the degradation of various kinds of polyolefin namely polypropylene and polyethylene and the following are the findings:

• Alkanes are obtained as a principle degradation product in all the cases of degradation all kinds of waste plastics
• Liquid fuel products obtained by the plastic degradation are in between the range of 50-70% indicates practical and economic aspects of this degradation, as collection and transportation of liquids are easier compared with gases
• In this method degradation is achieved by using economic catalysts which makes the process more economic
• No hazards products were obtained after degradatio
• Potential method for the conversion of waste plastic to fuel products.
By the above project it is possible to produce amorphous Zeolite at the cost of about 100-120 rupee per KG (the cost of commercial amorphous Zeolite was around 1200-1400 rupee per KG). The cost of fuel oil thus obtained from waste plastic was around the cost of 30-32 per liter.

Two reactors, one pilot scale and another laboratory scale, were also designed in this project. The pilot scale reactor can be used for the pulverization and separation of silicate containing solid waste and laboratory scale.



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