{"id":5261,"date":"2024-03-15T19:48:00","date_gmt":"2024-03-15T11:48:00","guid":{"rendered":"https:\/\/woodrefinery.com\/zhenfang\/?p=5261"},"modified":"2024-03-15T19:50:21","modified_gmt":"2024-03-15T11:50:21","slug":"%e7%83%ad%e8%a7%a3%e5%90%88%e6%88%90%e8%8a%b3%e9%a6%99%e8%85%88valorization-of-waste-pet-understanding-the-role-of-active-ammonia-in-facilitating-pet-depolymerization-and-aromatic-nitrile-formation","status":"publish","type":"post","link":"https:\/\/woodrefinery.com\/zhenfang\/%e7%83%ad%e8%a7%a3%e5%90%88%e6%88%90%e8%8a%b3%e9%a6%99%e8%85%88valorization-of-waste-pet-understanding-the-role-of-active-ammonia-in-facilitating-pet-depolymerization-and-aromatic-nitrile-formation\/","title":{"rendered":"\u70ed\u89e3\u5408\u6210\u82b3\u9999\u8148Valorization of Waste PET: Understanding the Role of Active Ammonia in Facilitating PET Depolymerization and Aromatic Nitrile Formation"},"content":{"rendered":"\n

<\/p>\n\n\n

Valorization of Waste PET: Understanding the Role of Active Ammonia in Facilitating PET Depolymerization and Aromatic Nitrile Formation<\/strong><\/p>\n

Recently, Mr Geliang Xie supervised by assoc. Prof. Lujiang Xu published a research article in Journal of Cleaner Production about preparation of aromatic nitrile by pyrolysis of polyester plastic PET under active ammonia atmosphere.<\/p>\n

Realizing the recovery and valorization of waste polyethylene terephthalate (PET) plastics into value-added products have gained significant importance. This study successfully synthesized aromatic nitriles, specifically terephthalonitrile (TPN), from waste polyethylene terephthalate (PET) plastic through in situ catalytic pyrolysis with urea and \u03b3-Al2<\/sub>O3<\/sub> catalyst. Based on distributed activation energy model, positive interaction between waste PET and urea is responsible for improved thermal decomposition kinetics. The dosage of urea and pyrolysis temperature significantly influenced TPN production. TPN yield reached 32.5% with selectivity of 85% at 550\u00b0C and equivalent urea dosage. Density functional theory calculations validated the role of active ammonia in reducing energy barriers and thus facilitating PET depolymerization. The study highlights the feasibility of recycling waste PET into valuable aromatic nitriles through in situ catalytic pyrolysis with urea and enhances the understanding of the pyrolysis process.<\/p>\n

Publication:<\/p>\n

GL Xie, GQ Zhu, YF Kang, MX Zhu, QQ Lu, C He, LJ Xu*, Zhen Fang<\/strong>, Valorization of Waste PET: Understanding the Role of Active Ammonia in Facilitating PET Depolymerization and Aromatic Nitrile Formation. Journal of Cleaner Production<\/u> (IF 11.1), 434 (2024)<\/strong>, 140204. https:\/\/doi.org\/10.1016\/j.jclepro.2023.140204<\/a>.<\/p>\n

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With urea as the ammonia source and \u03b3-Al2<\/sub>O3<\/sub> as the catalyst, terephthalonitrile (TPA) can be synthesized by catalytic co-pyrolysis of PET. Co-pyrolysis reduces the activation energy by 50%. The yield and selectivity of TPN under optimal conditions were 32.53% and 85%, respectively.Density functional theory (DFT) calculations revealed the possible mechanism of PET formation of TPN in the presence of urea and \u03b3-Al2<\/sub>O3<\/sub>.<\/p>\n

\u4ee5\u5c3f\u7d20\u4e3a\u6c28\u6e90\uff0cPET\u5728\u03b3-Al2<\/sub>O3<\/sub>\u50ac\u5316\u5242\u4e0b\u8fdb\u884c\u50ac\u5316\u5171\u70ed\u89e3\u53ef\u4ee5\u5408\u6210\u5bf9\u82ef\u4e8c\u7532\u8148\uff08TPA\uff09\u3002\u5171\u70ed\u89e3\u53ef\u4f7f\u6d3b\u5316\u80fd\u964d\u4f4e50%\uff0c\u6700\u4f73\u6761\u4ef6\u4e0bTPN\u7684\u6536\u7387\u548c\u9009\u62e9\u6027\u5206\u522b\u4e3a32.53%\u548c85%\u3002\u5bc6\u5ea6\u6cdb\u51fd\u7406\u8bba\uff08DFT\uff09\u8ba1\u7b97\u63ed\u793a\u4e86\u5728\u5c3f\u7d20\u548c\u03b3-Al2<\/sub>O3<\/sub>\u5b58\u5728\u4e0bPET\u5f62\u6210TPN\u7684\u53ef\u80fd\u673a\u7406\u3002<\/p>\n

\n

 <\/p>\n

\u7855\u58eb\u751f\u8c22\u845b\u4eae\u5728\u5f90\u7984\u6c5f\u526f\u6559\u6388\u6307\u5bfc\u4e0b\uff0c\u5728\u56fd\u9645\u5b66\u672f\u671f\u520a<\/strong>Journal of Cleaner Production<\/strong>\u4e0a\u53d1\u8868\u7814\u7a76\u6027\u8bba\u6587\uff1a<\/strong><\/p>\n

\u5e9f<\/strong>PET<\/strong>\u7684\u589e\u503c<\/strong>:<\/strong>\u4e86\u89e3\u6d3b\u6027\u6c28\u5728\u4fc3\u8fdb<\/strong>PET<\/strong>\u89e3\u805a\u548c\u82b3\u8148\u751f\u6210\u4e2d\u7684\u4f5c\u7528<\/strong><\/p>\n

\u6700\u8fd1\uff0c\u7855\u58eb\u751f\u8c22\u845b\u4eae\u5728\u5f90\u7984\u6c5f\u526f\u6559\u6388\u6307\u5bfc\u4e0b\uff0c\u5728\u56fd\u9645\u5b66\u672f\u671f\u520aJournal of Cleaner Production (Q1; Impact factor: 11.1)\u4e0a\u53d1\u8868\u4e86\u4e00\u7bc7\u5173\u4e8e\u6d3b\u6027\u6c28\u6c1b\u56f4\u4e0b\u70ed\u89e3\u805a\u916f\u5851\u6599PET\u5236\u5907\u82b3\u9999\u8148\u7684\u7814\u7a76\u6027\u8bba\u6587\u3002<\/p>\n

\u5b9e\u73b0\u5e9f\u65e7\u805a\u5bf9\u82ef\u4e8c\u7532\u9178\u4e59\u4e8c\u9187\u916f(PET)\u5851\u6599\u7684\u56de\u6536\u548c\u589e\u503c\u4e3a\u589e\u503c\u4ea7\u54c1\u5177\u6709\u91cd\u8981\u610f\u4e49\u3002\u4ee5\u805a\u5bf9\u82ef\u4e8c\u7532\u9178\u4e59\u4e8c\u9187\u916f(PET)\u5e9f\u5851\u6599\u4e3a\u539f\u6599\uff0c\u5728\u5c3f\u7d20\u548c\u03b3-Al2<\/sub>O3<\/sub>\u50ac\u5316\u5242\u7684\u50ac\u5316\u4e0b\u539f\u4f4d\u70ed\u89e3\u5408\u6210\u4e86\u82b3\u9999\u65cf\u8148\uff0c\u7279\u522b\u662f\u5bf9\u82ef\u4e8c\u7532\u9178\u4e59\u4e8c\u9187\u916f(PET)\u3002\u57fa\u4e8e\u5206\u5e03\u6d3b\u5316\u80fd\u6a21\u578b\uff0c\u5e9fpet\u4e0e\u5c3f\u7d20\u7684\u6b63\u76f8\u4e92\u4f5c\u7528\u662f\u6539\u5584\u70ed\u5206\u89e3\u52a8\u529b\u5b66\u7684\u539f\u56e0\u3002\u5c3f\u7d20\u7528\u91cf\u548c\u70ed\u89e3\u6e29\u5ea6\u5bf9TPN\u4ea7\u91cf\u6709\u663e\u8457\u5f71\u54cd\u3002\u5728550\u2103\u3001\u540c\u7b49\u5c3f\u7d20\u7528\u91cf\u6761\u4ef6\u4e0b\uff0cTPN\u6536\u7387\u4e3a32.5%\uff0c\u9009\u62e9\u6027\u4e3a85%\u3002\u5bc6\u5ea6\u6cdb\u51fd\u7406\u8bba\u8ba1\u7b97\u9a8c\u8bc1\u4e86\u6d3b\u6027\u6c28\u5728\u964d\u4f4e\u80fd\u5792\u4ece\u800c\u4fc3\u8fdbPET\u89e3\u805a\u4e2d\u7684\u4f5c\u7528\u3002\u8be5\u7814\u7a76\u7a81\u51fa\u4e86\u5229\u7528\u5c3f\u7d20\u539f\u4f4d\u50ac\u5316\u70ed\u89e3\u5c06\u5e9fPET\u56de\u6536\u4e3a\u6709\u4ef7\u82b3\u9999\u70c3\u7684\u53ef\u884c\u6027\uff0c\u5e76\u52a0\u6df1\u4e86\u5bf9\u70ed\u89e3\u8fc7\u7a0b\u7684\u8ba4\u8bc6\u3002<\/p>\n

\u8be6\u60c5\u53ef\u89c1\uff1a<\/p>\n

GL Xie, GQ Zhu, YF Kang, MX Zhu, QQ Lu, C He, LJ Xu*, Zhen Fang<\/strong>, Valorization of Waste PET: Understanding the Role of Active Ammonia in Facilitating PET Depolymerization and Aromatic Nitrile Formation. Journal of Cleaner Production<\/u> (IF 11.1), 434 (2024)<\/strong>, 140204. https:\/\/doi.org\/10.1016\/j.jclepro.2023.140204<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

Valorization of Waste PET: Understanding the Role of Ac […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts\/5261"}],"collection":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/comments?post=5261"}],"version-history":[{"count":2,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts\/5261\/revisions"}],"predecessor-version":[{"id":5264,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts\/5261\/revisions\/5264"}],"wp:attachment":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/media?parent=5261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/categories?post=5261"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/tags?post=5261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}