{"id":3590,"date":"2023-04-03T20:22:02","date_gmt":"2023-04-03T12:22:02","guid":{"rendered":"https:\/\/sustainability.nus.edu.sg\/?p=3590"},"modified":"2023-04-23T20:23:09","modified_gmt":"2023-04-23T12:23:09","slug":"co2-capture-material-could-bring-economic-payback","status":"publish","type":"post","link":"https:\/\/sustainability.nus.edu.sg\/2023\/04\/03\/co2-capture-material-could-bring-economic-payback\/","title":{"rendered":"CO2 capture material could bring economic payback"},"content":{"rendered":"\r\n<h1>CO2 capture material could bring economic payback<\/h1>\r\n<p><img loading=\"lazy\" decoding=\"async\" title=\"co2 capture\" src=\"https:\/\/sustainability.nus.edu.sg\/wp-content\/uploads\/2023\/04\/co2-capture-1024x576.jpg\" alt=\"The researchers say the COF material has the potential to deliver a financial payback by enabling the production of commercial chemicals from the captured gas.\" width=\"1024\" height=\"576\" \/> The researchers say the COF material has the potential to deliver a financial payback by enabling the production of commercial chemicals from the captured gas.<\/p>\r\n<p>A new material for capturing carbon dioxide (CO<sub>2<\/sub>) discovered by researchers at CDE could be a significant step forward in reducing emissions and mitigating global warming.<\/p>\r\n<p>The researchers say it also has the potential to deliver a financial payback by creating the basis for producing commercial chemicals from the captured gas.<\/p>\r\n<p>This would make the process of capturing emissions not only beneficial to the environment, but create an economic benefit as well.<\/p>\r\n<p>The mechanism is based on a new type of porous polymer material known as a covalent organic framework (COF) that has been treated with metal ions. This gives the treated COF the ability to capture and retain far higher levels of CO<sub>2<\/sub>\u00a0compared to other materials currently used for carbon capture.<\/p>\r\n<p>The material was developed by a research team at CDE led by Associate Professor Zhao Dan (Department of Chemical and Biomolecular Engineering).<\/p>\r\n<p>The team&#8217;s findings were\u00a0<a href=\"https:\/\/www.pnas.org\/doi\/10.1073\/pnas.2217081120\">reported recently in the scientific journal PNAS<\/a>, published by the National Academy of Sciences in the US.<\/p>\r\n<p><img loading=\"lazy\" decoding=\"async\" title=\"co2 capture1\" src=\"https:\/\/sustainability.nus.edu.sg\/wp-content\/uploads\/2023\/04\/co2-capture1-1024x576.jpg\" alt=\"Treating the COF material with metal ions enables it to capture and retain far higher levels of CO2 compared to other materials currently used for carbon capture.\" width=\"1024\" height=\"576\" \/> Treating the COF material with metal ions enables it to capture and retain far higher levels of CO2 compared to other materials currently used for carbon capture.<\/p>\r\n<p>COFs made from various materials are a relatively recent invention that have attracted growing scientific interest because their highly porous crystalline structure makes them useful for applications such as gas storage and catalysis.<\/p>\r\n<p>They can also be designed to have very specific pore sizes and shapes, which makes them useful for gas separation &#8211; an essential property in capturing CO<sub>2<\/sub>\u00a0efficiently from emission sources such as power plants.<\/p>\r\n<p>The new COF material developed by Assoc. Prof. Zhao works by capturing CO<sub>2<\/sub>\u00a0molecules via insertion between metal ions and nitrogen atoms on its surface.<\/p>\r\n<p>A particular benefit of the new material with regard to CO<sub>2<\/sub>\u00a0capture applications is the high selectivity it implies in the unique CO<sub>2<\/sub>\u00a0capture mechanism, especially when compared to other gas filtering materials in use.<\/p>\r\n<p>&#8220;What this means,&#8221; said Assoc. Prof. Zhao, &#8220;is the degree of &#8216;pickiness&#8217; the material shows in extracting one gas from a combination of gases, such as what we see in the mixture of emissions coming out of the flue systems of power stations&#8221;.<\/p>\r\n<p>In such scenarios, whilst the amount of CO<sub>2<\/sub>\u00a0emitted by power plants is large, the proportion of CO<sub>2<\/sub>\u00a0in the overall emissions each plant generates is relatively low, typically varying from around 4 to 15% of total emissions.<\/p>\r\n<p>This has proven a problem for other filter materials, which can extract CO<sub>2<\/sub>\u00a0at high concentrations but struggle to work effectively when the concentrations are low.<\/p>\r\n<p><img loading=\"lazy\" decoding=\"async\" title=\"co2 capture2\" src=\"https:\/\/sustainability.nus.edu.sg\/wp-content\/uploads\/2023\/04\/co2-capture2-1024x576.jpg\" alt=\"The research was led by Asst Prof Zhao Dan (right) pictured with research fellow Dr Kang Chengjun.\" width=\"1024\" height=\"576\" \/> The research was led by Asst Prof Zhao Dan (right) pictured with research fellow Dr Kang Chengjun.<\/p>\r\n<p>In the case of the new COF material, however, the strong attraction of the nitrogen and ion atoms on the CO<sub>2<\/sub>\u00a0molecules makes it act like a magnet for the gas.<\/p>\r\n<p>&#8220;With this new COF material, we found a very interesting mechanism,&#8221; said Assoc. Prof. Zhao.<\/p>\r\n<p>&#8220;CO<sub>2<\/sub>\u00a0is drawn into the material, and it gets grabbed by two atoms &#8211; one is nitrogen, one is metal &#8211; so that the CO<sub>2<\/sub>\u00a0becomes activated. With molecules, if you grab them just by one force, the molecule is adsorbed onto the material; but if you grab it by two types of force, you elongate the molecule, and the molecular bond gets weakened.&#8221;<\/p>\r\n<p>This weakening of the molecular bond, he said, opens up the possibility of converting the adsorbed CO<sub>2<\/sub>\u00a0into other gases used to make chemicals that could then be sold, creating a commercial product from what is typically seen as a &#8220;waste&#8221; gas.<\/p>\r\n<p>&#8220;When developing carbon capture technology, there&#8217;s always the question of what are you going to do with the captured CO<sub>2<\/sub>?&#8221; said Assoc. Prof. Zhao.<\/p>\r\n<p>&#8220;The problem is that CO<sub>2<\/sub>\u00a0is a very stable molecule with very strong bonds &#8211; normally you need high temperature, high pressure, or other energy-intensive methods to activate it, all of which are expensive. But in the case of this new material, with the CO<sub>2<\/sub>\u00a0adsorbed onto the COF&#8217;s surface by nitrogen and ion atoms, it becomes activated, and the bond weakened.&#8221;<\/p>\r\n<p>Assoc. Prof. Zhao said this &#8220;creates the exciting potential that CO<sub>2<\/sub>\u00a0is not only captured by the COF material, but it is activated and ready to be converted&#8221;.<\/p>\r\n<p><em>&#8220;This work was supported by A*STAR Low-Carbon Energy Research Funding Initiative (LCER FI) under the project &#8220;Adsorptive Carbon Capture Using Framework Materials&#8221; and in collaboration with ExxonMobil under the auspices of the Singapore Energy Centre.&#8221;<\/em><\/p>\r\n<p>This article first appeared on the <a href=\"https:\/\/cde.nus.edu.sg\/news-detail\/co2-capture-material-could-bring-economic-payback\/\">College of Design and Engineering<\/a> website on 3 April 2023.<\/p>\r\n<p>&nbsp;<\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>CO2 capture material could bring economic payback The researchers say the COF material has the potential to deliver a financial payback by enabling the production of commercial chemicals from the captured gas. A new material for capturing carbon dioxide (CO2) discovered by researchers at CDE could be a significant step forward in reducing emissions and<\/p>\n","protected":false},"author":19,"featured_media":3593,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","footnotes":""},"categories":[6],"tags":[],"class_list":["post-3590","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CO2 capture material could bring economic payback - NUS Sustainability<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sustainability.nus.edu.sg\/2023\/04\/03\/co2-capture-material-could-bring-economic-payback\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CO2 capture material could bring economic payback - NUS Sustainability\" \/>\n<meta property=\"og:description\" content=\"CO2 capture material could bring economic payback The researchers say the COF material has the potential to deliver a financial payback by enabling the production of commercial chemicals from the captured gas. 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