{"id":3447,"date":"2024-04-30T10:34:00","date_gmt":"2024-04-30T08:34:00","guid":{"rendered":"https:\/\/site.uit.no\/nordco2\/?p=3447"},"modified":"2024-10-11T12:19:44","modified_gmt":"2024-10-11T10:19:44","slug":"research-article-hu-2","status":"publish","type":"post","link":"https:\/\/site.uit.no\/nordco2\/2024\/04\/30\/research-article-hu-2\/","title":{"rendered":"Research Article: HU"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/pubs.rsc.org\/en\/Image\/Get?imageInfo.ImageType=GA&amp;imageInfo.ImageIdentifier.ManuscriptID=D4SU00022F&amp;imageInfo.ImageIdentifier.Year=2024\" alt=\"Graphical Abstract\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Title:<\/strong><br><a href=\"https:\/\/pubs.rsc.org\/en\/content\/articlelanding\/2024\/su\/d4su00022f\" data-type=\"link\" data-id=\"https:\/\/pubs.rsc.org\/en\/content\/articlelanding\/2024\/su\/d4su00022f\">Synergetic effects on the capture and release of CO<sub>2<\/sub>\u00a0using guanidine and amidine superbases<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Abstract:<\/strong><br>The capture of CO<small><sub>2<\/sub><\/small>\u00a0from air is of utmost importance, not only to reduce its impact on climate change but also for its utilisation as a tremendous, renewable source of C1 building blocks for sustainable chemical synthesis. Novel and known superbase structures are compared in a new selection of solvents for CO<small><sub>2<\/sub><\/small>\u00a0capture and release. Bicyclic amidine and guanidine superbases with 6\u20135, 6\u20136 and 6\u20137 configurations and many methylated analogues are investigated. As reported here, identified superbase\/solvent combinations offer a highly efficient, reversible, and kinetically favourable CO<small><sub>2<\/sub><\/small>\u00a0capture process from air. The two most beneficial superbase\/solvent synergic combinations identified are 1,5,7-triazabicyclo[4.3.0]non-6-ene (TBN) in butyl acetate and 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) in acetonitrile. They reach saturation after 15 min with pure CO<small><sub>2<\/sub><\/small>\u00a0and after 24 hours under open-air conditions and release CO<small><sub>2<\/sub><\/small>\u00a0with a CO<small><sub>2<\/sub><\/small>\/superbase molar ratio of 0.41 and 0.25, respectively. Due to the favourable thermodynamics of the systems, quantitative CO<small><sub>2<\/sub><\/small>\u00a0release for TBN and DBN occurs under mild conditions at 90 \u00b0C and 60 \u00b0C within 20 minutes. The required time for a complete absorption\u2013desorption cycle for both TBN-butyl acetate and DBN-acetonitrile was only 48.5 and 38.5 minutes respectively. Superbase\u2013solvent mixtures are recyclable and the system retains its initial CO<small><sub>2<\/sub><\/small>\u00a0capturing capability after 5 cycles. As this apparently easy emerging system design allows the direct capture of CO<small><sub>2<\/sub><\/small>\u00a0from air, it has potential for positive utilization on the global scale.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Find a list of publications by\u00a0NordCO<sub>2<\/sub>\u00a0members on our\u00a0<a href=\"https:\/\/site.uit.no\/nordco2\/publications\/\">Publications<\/a>\u00a0page\u00a0\ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Title:Synergetic effects on the capture and release of CO2\u00a0using guanidine and amidine superbases Abstract:The capture of CO2\u00a0from air is of utmost importance, not only to &hellip;<\/p>\n","protected":false},"author":514,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"image","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-3447","post","type-post","status-publish","format-image","hentry","category-research","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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