What is feedstock recycling?

Feedstock recycling, also known as chemical recycling or tertiary recycling, aims to convert waste polymer into original monomers or other valuable chemicals. These products are useful as feedstock for a variety of downstream industrial processes or as transportation fuels.

How is feedstock recycling done?

Feedstock recycling, also known as “chemical recycling,” is the process of breaking down collected plastics into monomers and other basic chemical elements (“depolymerization”). … These monomers can be used as virgin material alternatives in manufacturing new polymers.

What are the 3 types of recycling?

Here are the three main types of recycling: mechanical, energy and chemical. Every single type is subdivided into minor categories, but understanding them gives us a better idea of how the world processes most of its recyclables. Any of these three main recycling types involves three basic steps.

What is meant by chemical recycling?

Chemical Recycling is defined as any reprocessing technology that directly affects either the formulation of the polymeric waste or the polymer itself and converts them into chemical substances and/or products whether for the original or other purposes, excluding energy recovery.

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What is pyrolysis plastic recycling?

Pyrolysis is a common technique used to convert plastic waste into energy, in the form of solid, liquid and gaseous fuels. Pyrolysis is the thermal degradation of plastic waste at different temperatures (300–900°C), in the absence of oxygen, to produced liquid oil (Rehan et al., 2017).

What is an advantage of feedstock recycling?

Feedstock recycling of scrap polymers by thermal and chemical degradation is well known and environmentally accepted. Figure 1 shows that it enables one to recover raw materials (and primary energy) from waste and applied processes that are identical or similar to those of energy carriers production.

What feedstock means?

A feedstock is defined as any renewable, biological material that can be used directly as a fuel, or converted to another form of fuel or energy product.

What are 2 types of recycling?

There are two broad types of recycling operations: internal and external. Internal recycling is the reuse in a manufacturing process of materials that are a waste product of that process. Internal recycling is common in the metals industry, for example.

What are the 4 steps used in recycling?

Recycling includes the following four steps:

  • Step 1: Collection. There are several methods for collecting recyclables, including: …
  • Step 2: Processing. …
  • Step 3: Manufacturing. …
  • Step 4: Purchasing Recycled-Content Products.

What are 4 examples of recyclable materials?

The materials that can be recycled are glass, aluminum, plastic water bottles, metal scrap, different kinds of paper, electronics –computers, cellular phones, keyboards, batteries and other small electronic equipment, textile, wood, wire, cables, plastic product, rubber, etc.

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What is the difference between mechanical and chemical recycling?

Chemical recycling splits polymer chains and supplies products such as crude oil, naphtha, or fuels. Mechanical recycling preserves the molecular structure. It mechanically crushes the plastic and remelts it into granulate. This granulate is then used to make new plastic products.

How much plastic is chemically recycled?

From plastic waste to virgin-grade products

Globally, around 250 million metric tons of plastic waste are generated each year. Only around 20 percent of this plastic is recycled, thus keeping the material in circulation.

How do we recycle chemicals?

When these products are discarded, they become “household hazardous waste.” In California, it is illegal to dispose of household hazardous waste in the trash, down the drain, or by abandonment. Household hazardous waste needs to be disposed of through a Household Hazardous Waste Program.