How is plastic used as feedstock?
The term ‘feedstock recycling’ is used to differentiate thermal processes that convert the waste plastic into feedstock for a petrochemical plant, from chemical processes that purify the plastic waste stream (i.e., purification) or break down the waste product into monomers (i.e., depolymerisation) for further …
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.
What is feedstock for cracking?
Typically, the feedstocks for catalytic cracking can be any one (or blends) of the following: (i) straight-run gas oil, (ii) vacuum gas oil, and (iii) heavy feedstocks such as heavy oil, atmospheric residuum, vacuum residuum, extra-heavy oil, and tar sand bitumen.
What is pyrolysis recycling?
Pyrolysis is a recycling technique converting plastic waste into fuels, monomers, or other valuable materials by thermal and catalytic cracking processes. It allows the treatment of mixed, unwashed plastic wastes.
What is the difference between feedstock and raw materials?
Raw material can encompass the entirety of what goes into making a product. For instance, fabric, thread, dye, and buttons, are all raw material for making a shirt. Feedstock is usually a single, uniform, raw material that is given as an input into a machine or process, usually in large quantities.
Why is cracking of long chain alkanes important?
Reasons for cracking Cracking is important for two main reasons: It helps to match the supply of fractions with the demand for them. It produces alkenes, which are useful as feedstock for the petrochemical industry.
Why is recycling, plastic difficult?
Due to lack of knowledge, different types of plastic are often combined in manufacturing processes, which makes recycling them much more difficult. This often leads to plastics being incinerated, which is a major waste of valuable resources. We have the tools and knowledge to create circular recycling for plastics.