{"id":13553,"date":"2024-11-12T15:25:11","date_gmt":"2024-11-12T15:25:11","guid":{"rendered":"https:\/\/lequia-udg.com\/2024\/11\/12\/defensa-de-tesi-doctoral-de-meritxell-romans-bio-electro-co2-recycling-into-added-value-compounds\/"},"modified":"2024-11-19T09:54:50","modified_gmt":"2024-11-19T09:54:50","slug":"defensa-de-tesi-doctoral-de-meritxell-romans-bio-electro-co2-recycling-into-added-value-compounds","status":"publish","type":"post","link":"https:\/\/lequia-udg.com\/ca\/2024\/11\/12\/defensa-de-tesi-doctoral-de-meritxell-romans-bio-electro-co2-recycling-into-added-value-compounds\/","title":{"rendered":"Defensa de tesi doctoral de Meritxell Romans “Bio-electro CO2 recycling into added value compounds”"},"content":{"rendered":"\t\t
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\r\n\t\t\t\r\n\t\t\t\tDate: 2024-11-22 \r\n\t\t\t\r\n\t\t\t<\/h4>\r\n\t\t

\r\n\t\t\t\r\n\t\t\t\tPhD dissertation by Meritxell Romans Casas: \n\"Bio-electro CO2 recycling into added value compounds: \ninsights, routes, strategies and performance improvements\"\n\r\n\t\t\t\r\n\t\t\t<\/h2>\r\n\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Resum:<\/p>\n\n\n\n\n\n
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PhD-Meritxell-Romans-CAT_EN_ES<\/a><\/div>\n<\/div>\n<\/td>\n<\/tr>\n
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Publicacions principals<\/u>:<\/p>\n

Romans-Casas et al, Selective butyric acid production from CO2<\/sub> and its upgrade to butanol in microbial electrosynthesis cells, Environmental Science and Ecotechnology, 17, 2024, 100303, https:\/\/doi.org\/10.1016\/j.ese.2023.100303<\/a>.<\/p>\n

Romans-Casas et al, Boosting ethanol production rates from carbon dioxide in MES cells under optimal solventogenic conditions, Science of The Total Environment, 56, 1, 2023, 159124, https:\/\/doi.org\/10.1016\/j.scitotenv.2022.159124<\/a>.<\/p>\n

Romans-Casas et al, Bio-electro CO2<\/sub>recycling platform based on two separated steps, Journal of Environmental Chemical Engineering, 9, 5, 2021, https:\/\/doi.org\/10.1016\/j.jece.2021.105909<\/a>.<\/p>\n

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Convertir di\u00f2xid de carboni (CO2<\/sub>) en recursos valuosos contribueix a la descarbonitzaci\u00f3 de la ind\u00fastria i a la promoci\u00f3 de l\u2019economia circular.\u00a0 Els processos biol\u00f2gics principals de conversi\u00f3 del CO2<\/sub> s\u00f3n l\u2019electro-s\u00edntesi microbiana <\/strong>(en angl\u00e8s, microbial electrosynthesis<\/em> o MES<\/em><\/strong>) i la fermentaci\u00f3 anaer\u00f2bica<\/strong> (en angl\u00e8s, anaerobic fermentation<\/em> o AF<\/em><\/strong>). La MES \u00e9s particularment prometedora, ja que no consumeix reactius qu\u00edmics i proporciona energia reductora in situ<\/em>, que es pot obtenir de fonts renovables. Fins ara, els estudis de MES s\u2019han centrat majorit\u00e0riament en la conversi\u00f3 del CO2<\/sub> a \u00e0cid ac\u00e8tic o met\u00e0. Aquesta tesi doctoral fa un pas endavant i apunta a compostos m\u00e9s valuosos com l\u2019etanol i \u00e0cids carbox\u00edlics de cadena m\u00e9s llarga (\u00e0cid but\u00edric i caproic). A m\u00e9s, estudia per primer cop l\u2019acoblament de l\u2019electro-s\u00edntesi microbiana amb processos de fermentaci\u00f3 anaer\u00f2bica i la implementaci\u00f3 d\u2019un sistema basat en membranes. L\u2019objectiu \u00e9s incrementar els ratis de producci\u00f3, reduir el consum d\u2019energia i millorar la selectivitat dels productes mitjan\u00e7ant l\u2019optimitzaci\u00f3 de les condicions operacionals.<\/p>\n

L\u2019etanol <\/strong>s\u2019utilitza com a combustible i dissolvent qu\u00edmic, i en la s\u00edntesi de diversos compostos org\u00e0nics, entre altres aplicacions. Aquesta tesi es va centrar en la producci\u00f3 bioqu\u00edmica d\u2019etanol a partir de CO2<\/sub> via solventog\u00e8nesi (amb esp\u00e8cies Clostridium<\/em>). La Meritxell Romans va investigar a escala laboratori nous materials per la cel\u00b7la (acer inoxidable), configuracions optimitzades de reactors (cel\u00b7les el\u00e8ctricament eficients apilades, amb dist\u00e0ncia curta entre el\u00e8ctrodes) i noves estrat\u00e8gies operacionals. A m\u00e9s a m\u00e9s, va implementar un sistema de control autom\u00e0tic. Aix\u00f2 va permetre definir els par\u00e0metres operacionals \u00f2ptims per afavorir la producci\u00f3 d\u2019etanol: pH baix (< 5.0), pressions parcials de CO2<\/sub> baixes (pCO2<\/sub> < 0.1 atm), pressions parcials d\u2019hidrogen altes (pH2<\/sub> > 2.0 atm) i concentracions d\u2019\u00e0cid ac\u00e8tic superiors a 6.0 g L-1<\/sup>. Aplicant aquests coneixements, la investigadora va assolir una producci\u00f3 cont\u00ednua d\u2019etanol de 777,7 mg per litre de cel\u00b7la i dia (mg L-1<\/sup> d-1<\/sup>) i una selectivitat de producci\u00f3 del 60%.<\/p>\n

Els \u00e0cids but\u00edric i caproic <\/strong>s\u2019utilitzen per produir nombrosos compostos per la ind\u00fastria qu\u00edmica, energ\u00e8tica i farmac\u00e8utica. De manera an\u00e0loga a l\u2019etanol, Meritxell Romans va investigar l\u2019\u00fas de cel\u00b7les de dist\u00e0ncia curta entre el\u00e8ctrodes per produir \u00e0cid but\u00edric a partir de CO2<\/sub> i va assolir una selectivitat del 78% amb una demanda d\u2019energia de 34.6 kWh kg-1<\/sup>, un valor dos cops inferior al que s\u2019havia requerit amb anterioritat. D\u2019altra banda, la investigadora va dissenyar i desenvolupar un nou sistema integrat de dues etapes en el qual l\u2019etanol i l\u2019\u00e0cid ac\u00e8tic que es produeixen en una cel\u00b7la d\u2019electro-s\u00edntesi microbiana actuen com a substrat en un proc\u00e9s de fermentaci\u00f3 anaer\u00f2bica per elongar a \u00e0cids but\u00edric i caproic. Aquesta configuraci\u00f3 permet obtenir \u00e0cid caproic a un rati de 0.74 g L-1 <\/sup>d-1<\/sup>. Finalment, va dissenyar un sistema innovador de membrana submergida en un fermentador per dosificar l\u2019etanol i l\u2019\u00e0cid ac\u00e8tic amb membranes no poroses, assolint una selectivitat del 94% i ratis de producci\u00f3 de 3.1 g L-1<\/sup> d-1<\/sup>. La invenci\u00f3 ha estat patentada.<\/p>\n

Aquests resultats tan notables contribuiran a escalar i comercialitzar les tecnologies d\u2019electro-s\u00edntesi microbiana i la seva integraci\u00f3 amb processos de fermentaci\u00f3 per convertir el CO2<\/sub> en compostos valuosos. L\u2019impacte d\u2019aquest enfocament circular \u00e9s alt, tant en relaci\u00f3 a la descarbonitzaci\u00f3 de la ind\u00fastria com a la reducci\u00f3 de la depend\u00e8ncia dels recursos f\u00f2ssils. La tesi ha estat dirigida pel Dr. Sebasti\u00e0 Puig i la Dra. Maria Dolors Balaguer del grup de recerca LEQUIA (Universitat de Girona) i pel Dr. Paolo Dess\u00ec (Universitat de N\u00e0pols Federico II).<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Data:<\/strong><\/td>\n22-11-2024<\/td>\n<\/tr>\n
Adre\u00e7a:<\/strong><\/td>\nAula Magna “Rosalind Franklin” de la Facultat de Ci\u00e8ncies, carrer Maria Aur\u00e8lia Capmany 69, Girona<\/td>\n<\/tr>\n
Hora:<\/strong><\/td>\n10:00h<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Date: 2024-11-22 PhD dissertation by Meritxell Romans Casas: “Bio-electro CO2 recycling into added value compounds: insights, routes, strategies and performance improvements” Resum: PhD-Meritxell-Romans-CAT_EN_ES Publicacions principals: Romans-Casas et al, Selective butyric acid production from CO2 and its upgrade to butanol in microbial electrosynthesis cells, Environmental Science and Ecotechnology, 17, 2024, 100303, https:\/\/doi.org\/10.1016\/j.ese.2023.100303. Romans-Casas et al, Boosting … Defensa de tesi doctoral de Meritxell Romans “Bio-electro CO2 recycling into added value compounds”<\/span>“>Continue reading Defensa de tesi doctoral de Meritxell Romans “Bio-electro CO2 recycling into added value compounds”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":13674,"comment_status":"closed","ping_status":"open","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"footnotes":""},"categories":[69,70],"tags":[],"class_list":["post-13553","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-events-ca","category-noticies-ca"],"_links":{"self":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts\/13553","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/comments?post=13553"}],"version-history":[{"count":14,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts\/13553\/revisions"}],"predecessor-version":[{"id":13570,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts\/13553\/revisions\/13570"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/media\/13674"}],"wp:attachment":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/media?parent=13553"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/categories?post=13553"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/tags?post=13553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}