Catalytic cracking of polyethylene over clay catalysts. Comparison with an ultrastable Y zeolite

Manos, G; Yusof, IY; Papayannakos, N; Gangas, NH

dc.contributor.author	Manos, G	en
dc.contributor.author	Yusof, IY	en
dc.contributor.author	Papayannakos, N	en
dc.contributor.author	Gangas, NH	en
dc.date.accessioned	2014-03-01T01:16:13Z
dc.date.available	2014-03-01T01:16:13Z
dc.date.issued	2001	en
dc.identifier.issn	0888-5885	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13980
dc.subject	Catalytic Cracking	en
dc.subject	Polyethylene	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Natural clays	en
dc.subject.other	Acidity	en
dc.subject.other	Catalysts	en
dc.subject.other	Clay	en
dc.subject.other	Fuels	en
dc.subject.other	Polyethylenes	en
dc.subject.other	Recycling	en
dc.subject.other	Zeolites	en
dc.subject.other	Catalytic cracking	en
dc.subject.other	coke	en
dc.subject.other	polyethylene	en
dc.subject.other	zeolite	en
dc.subject.other	catalyst	en
dc.subject.other	cracking	en
dc.subject.other	polyethylene	en
dc.subject.other	zeolite	en
dc.subject.other	acidity	en
dc.subject.other	article	en
dc.subject.other	catalysis	en
dc.subject.other	catalyst	en
dc.subject.other	clay	en
dc.subject.other	molecular stability	en
dc.subject.other	reaction analysis	en
dc.subject.other	temperature dependence	en
dc.title	Catalytic cracking of polyethylene over clay catalysts. Comparison with an ultrastable Y zeolite	en
heal.type	journalArticle	en
heal.identifier.primary	10.1021/ie001048o	en
heal.identifier.secondary	http://dx.doi.org/10.1021/ie001048o	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	The catalytic cracking of polyethylene has been studied over two natural clays and their pillared analogues with a view toward assessing their suitability in a process for recycling plastic waste to fuel. Although these clays were found to be less active than US-Y zeolite around 600 K, at slightly higher process temperatures, they were able to completely decompose polyethylene. Their yields to liquid products were around 70%, compared to less than 50% over US-Y zeolite. Moreover, the liquid products obtained over the clay catalysts were heavier. Both of these facts are attributed to the milder acidity of clays, as the very strong acidity characterizing zeolites leads to overcracking. Furthermore, this milder acidity leads to significantly lower occurrence of hydrogen-transfer secondary reactions compared to US-Y zeolite, and as a consequence, predominantly alkenes were the products over the clay catalysts. An additional advantage of these catalysts is the considerably lower amount of coke formed.	en
heal.publisher	AMER CHEMICAL SOC	en
heal.journalName	Industrial and Engineering Chemistry Research	en
dc.identifier.doi	10.1021/ie001048o	en
dc.identifier.isi	ISI:000168620500003	en
dc.identifier.volume	40	en
dc.identifier.issue	10	en
dc.identifier.spage	2220	en
dc.identifier.epage	2225	en