Chemical upcycling of high-density polyethylene into upcycled waxes as rheology modifiers and paper coating materials

Shaker, Mohamed; Muzata, Tanyaradzwa S.; Hamdani, Syeda Shamila; Wyman, Ian; Saffron, Christopher M.; Rabnawaz, Muhammad

doi:10.1016/j.jclepro.2024.142943

Cited by 1 publication

(1 citation statement)

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“…Among all of these, thermal pyrolysis is one of the most promising chemical recycling processes. During pyrolysis, plastic undergoes thermal degradation in the absence of oxygen to produce a liquid product that resembles oil 23 or wax 24,25 along with trace amounts of gaseous products and solid residues. 26−28 The product distribution and composition depend on the type of feedstock, heating rate, temperature, pressure, catalyst, and reactor type.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Olefin Contents Formation during Waste Plastic Pyrolysis

Shaker,

Rabnawaz

2024

ACS Appl. Polym. Mater.

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As reported herein, we investigated the effect of feedstock composition, reactor type, and catalyst on the olefinic composition of oil recovered through plastic pyrolysis. We investigated an open reactor versus an autoclave closed reactor using polypropylene, linear low-density polyethylene, high-density polyethylene (HDPE), and low-density polyethylene, including both virgin and waste mixed plastics as feedstocks. The obtained oils were analyzed for comparison to their olefin contents. Additionally, the effects of H2 gas absorbers such as activated carbon and magnesium powder and an oxidant such as manganese stearate were evaluated regarding their impact on the olefin content of oils derived from both virgin and recycled HDPE. Our findings suggest that the formation of olefins (R–CH = CHR, where R is H or an alkyl group) during pyrolysis can be tailored through the selection of the reactor, feedstock, and catalysts, potentially enhancing the production of olefinic monomers from polyolefin waste plastics.

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Section: Introductionmentioning

confidence: 99%