{"id":1021741,"date":"2023-08-09T11:55:37","date_gmt":"2023-08-09T09:55:37","guid":{"rendered":"https:\/\/www.automotorsport.se\/automotorsport\/?p=1021741"},"modified":"2025-01-27T15:14:19","modified_gmt":"2025-01-27T14:14:19","slug":"katalysator-loser-gasbilarnas-metanproblem","status":"publish","type":"post","link":"https:\/\/www.automotorsport.se\/nyheter\/katalysator-loser-gasbilarnas-metanproblem\/","title":{"rendered":"Katalysator l\u00f6ser gasbilarnas metanproblem"},"content":{"rendered":"\n<p><strong>Utsl\u00e4pp av metan st\u00e5r f\u00f6r h\u00e4lften <\/strong>av den globala temperatur\u00f6kningen sedan f\u00f6rindustriella niv\u00e5er, skriver den <a rel=\"noreferrer noopener\" href=\"https:\/\/www.eea.europa.eu\/en\/newsroom\/editorial\/methane-gas-emissions-a-greenhouse-gas-crucial-to-mitigation-efforts\" target=\"_blank\">Europeiska milj\u00f6byr\u00e5n EEA<\/a>. Det \u00e4r k\u00e4nt att boskap \u00e4r stora metanbovar, men \u00e4ven gasbranschen och de tiotals miljoner gasbilar som k\u00f6rs i v\u00e4rlden bidrar till dessa s\u00e4rskilt allvarliga utsl\u00e4pp.<\/p>\n\n<p>Dagens gasbilar \u00e4r dock utrustade med katalysatorer som renar stora delar av metanutsl\u00e4ppen. \u00c4nd\u00e5 sl\u00e4pper bilarna ut stora m\u00e4ngder of\u00f6rbr\u00e4nd metan vid start, eftersom dagens katalysatorer fungerar d\u00e5ligt vid l\u00e5ga temperaturer.<\/p>\n\n<p><strong>Men nu kan ett genombrott <\/strong>\u00e4ndra p\u00e5 det. Forskare vid USA:s forskningsdepartements SLAC National Laboratory har tillsammans med forskare p\u00e5 Washington State University (WSU) tagit fram en ny katalysator f\u00f6r gasdrivna f\u00f6rbr\u00e4nningsmotorer. <a rel=\"noreferrer noopener\" href=\"https:\/\/news.wsu.edu\/press-release\/2023\/07\/20\/catalyst-can-control-methane-emissions-in-natural-gas-engines\/\" target=\"_blank\">Enligt<\/a> <a href=\"https:\/\/www6.slac.stanford.edu\/news\/2023-07-20-new-catalyst-could-dramatically-cut-methane-pollution-millions-engines\" target=\"_blank\" rel=\"noreferrer noopener\">forskarna<\/a> ska denna kunna f\u00e5nga upp s\u00e5 mycket som 90 procent av det of\u00f6rbr\u00e4nda metanet.<\/p>\n\n<p>L\u00f6sningen som de framg\u00e5ngsrikt testat kallas \u201dsingle atom catalyst\u201d, ungef\u00e4r enkelatom-katalys p\u00e5 svenska, och inneb\u00e4r att enskilda palladiumatomer placeras p\u00e5 ceriumoxid. Vid rumstemperatur f\u00e5r kolmonoxiden, som ocks\u00e5 finns i avgaser, palladiumatomerna att \u201dmigrera\u201d och forma kluster p\u00e5 tv\u00e5 eller tre atomer. Dessa atomkluster inne i katalysatorn plockar is\u00e4r metanmolekylerna \u00e4ven vid l\u00e5ga temperaturer. N\u00e4r den sedan n\u00e5r sin arbetstemperatur s\u00e5 sprids palladiumatomerna ut igen och processen b\u00f6rjar p\u00e5 nytt.<\/p>\n    <div class=\"dap-ad-format\" style=\"width:100%;display: flex;justify-content: space-between;overflow:hidden;flex-direction: column;align-items: center;\">\n        <div id='div-gpt-ad-dap-67b462766cc0c'>\n            <script> \n                typeof addSlot === \"function\" && addSlot(\n                    { \n                        id: 'div-gpt-ad-dap-67b462766cc0c', \n                        sizes: [[640, 360], [640, 480], [640, 320]], \n                        target: 'DAP_D', \n                        minSize: 1100, \n                        maxSize: Infinity \n                    }\n                )\n            <\/script>\n        <\/div>\n    <\/div>    <div class=\"dap-ad-format\" style=\"width:100%;display: flex;justify-content: space-between;overflow:hidden;flex-direction: column;align-items: center;\">\n        <div id='div-gpt-ad-dap-mobile-67b462766cc82'>\n            <script> \n                typeof addSlot === \"function\" && addSlot(\n                    { \n                        id: 'div-gpt-ad-dap-mobile-67b462766cc82', \n                        sizes: [[320, 50], [320, 320], [320, 480]], \n                        target: 'DAP_M', \n                        minSize: 0, \n                        maxSize: 1100 \n                    }\n                )\n            <\/script>\n        <\/div>\n    <\/div>\n<h2 class=\"wp-block-heading\">\u201dMirakul\u00f6st\u201d<\/h2>\n\n<p><strong>\u2013 Det \u00e4r n\u00e4stan en sj\u00e4lvreglerande process <\/strong>som mirakul\u00f6st \u00f6vervinner utmaningarna som folk har k\u00e4mpat med \u2013 inaktivitet vid l\u00e5g temperatur samt instabilitet vid h\u00f6g temperatur, s\u00e4ger professor Yong Wang p\u00e5 WSU i ett uttalande.<\/p>\n\n<p>Den nya enkelatom-katalystekniken ska nu vidareutvecklas. Forskarna uppger att de \u00e4nnu riktigt listat ut varf\u00f6r palladium beter sig annorlunda \u00e4n andra \u00e4delmetaller som brukar anv\u00e4ndas i katalysatorer, exempelvis platina. Det \u00e5terst\u00e5r att se n\u00e4r tekniken kan t\u00e4nkas vara mogen f\u00f6r att anv\u00e4ndas kommersiellt i en personbil.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bilar som g\u00e5r p\u00e5 naturgas sl\u00e4pper ut den farliga v\u00e4xthusgasen metan. En ny katalysator ska kunna f\u00e5nga 90 procent av utsl\u00e4ppen.<\/p>\n","protected":false},"author":5,"featured_media":1021839,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"ep_exclude_from_search":false,"footnotes":""},"categories":[577],"tags":[596,113,85,92],"credited-editor":[2282],"class_list":["post-1021741","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nyheter","tag-klimat","tag-klimat-miljo","tag-miljoteknik","tag-teknik","credited-editor-wiggo-bjorck"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/posts\/1021741","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/comments?post=1021741"}],"version-history":[{"count":1,"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/posts\/1021741\/revisions"}],"predecessor-version":[{"id":84227070,"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/posts\/1021741\/revisions\/84227070"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/media\/1021839"}],"wp:attachment":[{"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/media?parent=1021741"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/categories?post=1021741"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/tags?post=1021741"},{"taxonomy":"credited-editor","embeddable":true,"href":"https:\/\/www.automotorsport.se\/wp-json\/wp\/v2\/credited-editor?post=1021741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}