Polyethylene upcycling to long-chain alkylaromatics by tandem hydrogenolysis/aromatization
The current scale of plastics production and the accompanying waste disposal problems represent a largely untapped opportunity for chemical upcycling. Tandem catalytic conversion by platinum supported on γ-alumina converts various polyethylene grades in high yields (up to 80 weight percent) to low-m...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2020-10, Vol.370 (6515), p.437-441 |
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| creator | Zhang, Fan Zeng, Manhao Yappert, Ryan D Sun, Jiakai Lee, Yu-Hsuan LaPointe, Anne M Peters, Baron Abu-Omar, Mahdi M Scott, Susannah L |
| description | The current scale of plastics production and the accompanying waste disposal problems represent a largely untapped opportunity for chemical upcycling. Tandem catalytic conversion by platinum supported on γ-alumina converts various polyethylene grades in high yields (up to 80 weight percent) to low-molecular-weight liquid/wax products, in the absence of added solvent or molecular hydrogen, with little production of light gases. The major components are valuable long-chain alkylaromatics and alkylnaphthenes (average ~C
, dispersity Ð = 1.1). Coupling exothermic hydrogenolysis with endothermic aromatization renders the overall transformation thermodynamically accessible despite the moderate reaction temperature of 280°C. This approach demonstrates how waste polyolefins can be a viable feedstock for the generation of molecular hydrocarbon products. |
| doi_str_mv | 10.1126/science.abc5441 |
| format | Article |
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, dispersity Ð = 1.1). Coupling exothermic hydrogenolysis with endothermic aromatization renders the overall transformation thermodynamically accessible despite the moderate reaction temperature of 280°C. This approach demonstrates how waste polyolefins can be a viable feedstock for the generation of molecular hydrocarbon products.</description><identifier>ISSN: 0036-8075</identifier><identifier>EISSN: 1095-9203</identifier><identifier>DOI: 10.1126/science.abc5441</identifier><identifier>PMID: 33093105</identifier><language>eng</language><publisher>United States: The American Association for the Advancement of Science</publisher><subject>Alkylbenzenes ; Aluminum oxide ; Carbon ; Catalysts ; Catalytic converters ; Chemical degradation ; Coupling (molecular) ; Cutting ; Exothermic reactions ; Gases ; Hydrogen ; Hydrogenolysis ; INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY ; Molecular chains ; Plastics ; Platinum ; Polyethylene ; Polyethylenes ; Polymers ; Polyolefins ; Raw materials ; Transitional aluminas ; Waste disposal ; Weight</subject><ispartof>Science (American Association for the Advancement of Science), 2020-10, Vol.370 (6515), p.437-441</ispartof><rights>Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.</rights><rights>Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c393t-96d3d991af36b1cab25e4d90365d0e0eb59761dc2cc44081b6a03a7891b873f83</citedby><cites>FETCH-LOGICAL-c393t-96d3d991af36b1cab25e4d90365d0e0eb59761dc2cc44081b6a03a7891b873f83</cites><orcidid>0000-0003-1935-6085 ; 0000-0003-1161-0499 ; 0000-0001-6901-4150 ; 0000-0002-7830-0922 ; 0000-0001-9541-780X ; 0000-0003-0677-5045 ; 0000-0002-4412-1985 ; 0000-0003-2467-2306 ; 0000-0001-7868-3516 ; 0000000324672306 ; 0000000169014150 ; 0000000311610499 ; 0000000178683516 ; 0000000244121985 ; 000000019541780X ; 0000000306775045 ; 0000000278300922 ; 0000000319356085</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,2871,2872,27903,27904</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33093105$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/1682512$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Zhang, Fan</creatorcontrib><creatorcontrib>Zeng, Manhao</creatorcontrib><creatorcontrib>Yappert, Ryan D</creatorcontrib><creatorcontrib>Sun, Jiakai</creatorcontrib><creatorcontrib>Lee, Yu-Hsuan</creatorcontrib><creatorcontrib>LaPointe, Anne M</creatorcontrib><creatorcontrib>Peters, Baron</creatorcontrib><creatorcontrib>Abu-Omar, Mahdi M</creatorcontrib><creatorcontrib>Scott, Susannah L</creatorcontrib><creatorcontrib>Ames Lab., Ames, IA (United States)</creatorcontrib><title>Polyethylene upcycling to long-chain alkylaromatics by tandem hydrogenolysis/aromatization</title><title>Science (American Association for the Advancement of Science)</title><addtitle>Science</addtitle><description>The current scale of plastics production and the accompanying waste disposal problems represent a largely untapped opportunity for chemical upcycling. Tandem catalytic conversion by platinum supported on γ-alumina converts various polyethylene grades in high yields (up to 80 weight percent) to low-molecular-weight liquid/wax products, in the absence of added solvent or molecular hydrogen, with little production of light gases. The major components are valuable long-chain alkylaromatics and alkylnaphthenes (average ~C
, dispersity Ð = 1.1). Coupling exothermic hydrogenolysis with endothermic aromatization renders the overall transformation thermodynamically accessible despite the moderate reaction temperature of 280°C. This approach demonstrates how waste polyolefins can be a viable feedstock for the generation of molecular hydrocarbon products.</description><subject>Alkylbenzenes</subject><subject>Aluminum oxide</subject><subject>Carbon</subject><subject>Catalysts</subject><subject>Catalytic converters</subject><subject>Chemical degradation</subject><subject>Coupling (molecular)</subject><subject>Cutting</subject><subject>Exothermic reactions</subject><subject>Gases</subject><subject>Hydrogen</subject><subject>Hydrogenolysis</subject><subject>INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY</subject><subject>Molecular chains</subject><subject>Plastics</subject><subject>Platinum</subject><subject>Polyethylene</subject><subject>Polyethylenes</subject><subject>Polymers</subject><subject>Polyolefins</subject><subject>Raw materials</subject><subject>Transitional aluminas</subject><subject>Waste 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Science)</jtitle><addtitle>Science</addtitle><date>2020-10-23</date><risdate>2020</risdate><volume>370</volume><issue>6515</issue><spage>437</spage><epage>441</epage><pages>437-441</pages><issn>0036-8075</issn><eissn>1095-9203</eissn><abstract>The current scale of plastics production and the accompanying waste disposal problems represent a largely untapped opportunity for chemical upcycling. Tandem catalytic conversion by platinum supported on γ-alumina converts various polyethylene grades in high yields (up to 80 weight percent) to low-molecular-weight liquid/wax products, in the absence of added solvent or molecular hydrogen, with little production of light gases. The major components are valuable long-chain alkylaromatics and alkylnaphthenes (average ~C
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| source | American Association for the Advancement of Science |
| subjects | Alkylbenzenes Aluminum oxide Carbon Catalysts Catalytic converters Chemical degradation Coupling (molecular) Cutting Exothermic reactions Gases Hydrogen Hydrogenolysis INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY Molecular chains Plastics Platinum Polyethylene Polyethylenes Polymers Polyolefins Raw materials Transitional aluminas Waste disposal Weight |
| title | Polyethylene upcycling to long-chain alkylaromatics by tandem hydrogenolysis/aromatization |
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