{"id":1194,"date":"2015-08-31T21:50:55","date_gmt":"2015-08-31T21:50:55","guid":{"rendered":"http:\/\/www.kurzweilai.net\/?p=260641"},"modified":"2015-09-01T01:32:31","modified_gmt":"2015-09-01T01:32:31","slug":"how-to-capture-and-convert-co2-from-a-smokestack-in-a-single-step","status":"publish","type":"post","link":"https:\/\/hoo.central12.com\/fugic\/2015\/08\/31\/how-to-capture-and-convert-co2-from-a-smokestack-in-a-single-step\/","title":{"rendered":"How to capture and convert CO2 from a smokestack in a single step"},"content":{"rendered":"
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Using a novel catalyst, a single chemical assembly (UiO-66-P-BF2) could capture CO2 and also transform it and hydrogen into formic acid (HCOOH) via a two-step (yellow arrows) reaction (credit: Ye and Johnson\/ACS Catalysis)<\/p><\/div>\n

University of Pittsburgh researchers have invented (in computations) a cheap, efficient catalyst that would capture carbon dioxide (CO2) from coal-burning power plants before it reaches the atmosphere and converts the CO2\u00a0 into formic acid — a valuable chemical that would create a revenue return.\u00a0 <\/strong><\/p>\n

One current method for capturing CO2 uses Metal\u2013organic frameworks (MOFs)<\/a>, which have a porous, cage-like structure that can absorb CO2, but require expensive catalysts, like platinum.<\/p>\n

Instead, the researchers looked for lower-cost non-metallic catalysts, and found that a compound known as UiO-66-PBF2 would do the job.<\/p>\n

The method is similar to one developed by Rice University using a combination of\u00a0amine<\/a>-rich compounds and\u00a0carbon-60<\/a>\u00a0molecules.<\/p>\n

Those methods both differ from the “diamonds from the sky<\/a>” approach, which turns CO2 from the air into carbon nanofibers, by capturing the CO2 before it leaves a smokestack. It will be interesting to compare these approaches in terms of CO2 capture efficiency, energy cost, and revenue return.<\/p>\n

All three of these methods avoid the costs and energy expenditures from transporting and depositing CO2 at a storage site, required in carbon sequestration<\/a>.<\/p>\n

\n

Abstract of\u00a0Design of Lewis Pair-Functionalized Metal Organic Frameworks for CO2<\/sub> Hydrogenation<\/em><\/strong><\/p>\n

Efficient catalytic reduction of CO2<\/sub>\u00a0is critical for the large-scale utilization of this greenhouse gas. We have used density functional electronic structure methods to design a catalyst for producing formic acid from CO2<\/sub>\u00a0and H2<\/sub>\u00a0via a two-step pathway having low reaction barriers. The catalyst consists of a microporous metal organic framework that is functionalized with Lewis pair moieties. These functional groups are capable of chemically binding CO2<\/sub>\u00a0and heterolytically dissociating H2<\/sub>. Our calculations indicate that the porous framework remains stable after functionalization and chemisorption of CO2<\/sub>\u00a0and H2<\/sub>. We have identified a low barrier pathway for simultaneous addition of hydridic and protic hydrogens to carbon and oxygen of CO2<\/sub>, respectively, producing a physisorbed HCOOH product in the pore. We find that activating H2<\/sub>\u00a0by dissociative adsorption leads to a much lower energy pathway for hydrogenating CO2<\/sub>\u00a0than reacting H2<\/sub>\u00a0with chemisorbed CO2<\/sub>. Our calculations provide design strategies for efficient catalysts for CO2<\/sub>\u00a0reduction.<\/p>\n","protected":false},"excerpt":{"rendered":"

University of Pittsburgh researchers have invented (in computations) a cheap, efficient catalyst that would capture carbon dioxide (CO2) from coal-burning power plants before it reaches the atmosphere and converts the CO2  into formic acid — a valuable chemical that would create a revenue return.  One current method for capturing CO2 uses Metal–organic frameworks (MOFs), which […]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68,52,55,43],"tags":[],"class_list":["post-1194","post","type-post","status-publish","format-standard","hentry","category-energy","category-environmentclimate","category-nanotechmaterials-science","category-news"],"_links":{"self":[{"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/posts\/1194"}],"collection":[{"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/comments?post=1194"}],"version-history":[{"count":2,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/posts\/1194\/revisions"}],"predecessor-version":[{"id":1203,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/posts\/1194\/revisions\/1203"}],"wp:attachment":[{"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/media?parent=1194"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/categories?post=1194"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/tags?post=1194"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}