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Multiple use of waste catalysts with and without regeneration for waste polymer cracking

Ali, Salmiaton and Garforth, Arthur A. (2011) Multiple use of waste catalysts with and without regeneration for waste polymer cracking. Waste Management, 31 (6). pp. 1139-1145. ISSN 0956-053X; ESSN: 1879-2456

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Abstract

Waste plastics contain a substantial number of valuable chemicals. The wastes from post-consumer as well as from industrial production can be recycled to valuable chemical feedstock, which can be used in refineries and/or petrochemical industries. This chemical recycling process is an ideal approach in recycling the waste for a better environment. Polymer cracking using a laboratory fluidised bed reactor concentrated on the used highly contaminated catalyst, E-Cat 2. Even though E-Cat 2 had low activity due to fewer acid sites, the products yielded were similar with amorphous ASA and were far better than thermal cracking. The high levels of heavy metals, namely nickel and vanadium, deposited during their lifetime as an FCC catalyst, did not greatly affect on the catalyst activity. It was also shown that E-Cat 2 could be used with and without regeneration. Although there was more deactivation when there was no regeneration step, the yield of gases (C2–C7) remained fairly constant. For the first time, these results indicate that “waste” FCC catalyst (E-Cat) is a good candidate for future feedstock recycling of polymer waste. The major benefits of using E-Cat are a low market price, the ability to tolerate reuse and regeneration capacity.

Item Type:Article
Keyword:Recycling; Refuse disposal; Polymer wastes
Faculty or Institute:Faculty of Engineering
Publisher:Elsevier
DOI Number:10.1016/j.wasman.2011.01.025
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.wasman.2011.01.025
ID Code:23071
Deposited By: Nabilah Mustapa
Deposited On:30 Nov 2015 16:47
Last Modified:30 Nov 2015 16:47

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