{"id":82611,"date":"2022-09-05T23:23:08","date_gmt":"2022-09-05T20:23:08","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=82611"},"modified":"2022-09-05T23:23:08","modified_gmt":"2022-09-05T20:23:08","slug":"paradoxul-sulfului-vrem-sa-scapam-de-poluarea-combustibililor-fosili-petrol-si-gaze-dar-avem-nevoie-de-ei-pentru-a-produce-energia-curata-atunci-ce-facem","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/paradoxul-sulfului-vrem-sa-scapam-de-poluarea-combustibililor-fosili-petrol-si-gaze-dar-avem-nevoie-de-ei-pentru-a-produce-energia-curata-atunci-ce-facem\/","title":{"rendered":"&#8222;Paradoxul sulfului&#8221;: Vrem s\u0103 sc\u0103p\u0103m de poluarea combustibililor fosili (petrol \u015fi gaze), dar avem nevoie de ei pentru a produce &#8222;energia curat\u0103&#8221;! Atunci, ce facem!?"},"content":{"rendered":"<figure id=\"attachment_82613\" aria-describedby=\"caption-attachment-82613\" style=\"width: 368px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/09\/foc-sulf.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-82613\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/09\/foc-sulf.jpg\" alt=\"\" width=\"378\" height=\"259\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/09\/foc-sulf.jpg 378w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/09\/foc-sulf-300x206.jpg 300w\" sizes=\"auto, (max-width: 378px) 100vw, 378px\" \/><\/a><figcaption id=\"caption-attachment-82613\" class=\"wp-caption-text\"><strong>Imagine<\/strong>: <a href=\"https:\/\/pixabay.com\/ro\/photos\/piatr%c4%83-pre%c5%a3ioas%c4%83-piatr%c4%83-sulf-7941\/\" target=\"_blank\" rel=\"noopener\"><strong>pixabay.com<\/strong><\/a> (Commons Creative &#8211; free) + prelucrare proprie<\/figcaption><\/figure>\n<p>Privi\u021bi tabelul periodic \u0219i g\u00e2ndi\u021bi-v\u0103 la elementele necesare pentru o planet\u0103 prosper\u0103 alimentat\u0103 cu energie regenerabil\u0103. Sulful probabil c\u0103 nu va fi primul care v\u0103 va veni \u00een minte. Reputa\u021bia nociv\u0103 a &#8222;elementului galben&#8221; rezult\u0103 din faptul c\u0103 cea mai mare parte a sulfului din lume vine ca un produs secundar al rafin\u0103rii combustibililor fosili. \u00centr-un viitor \u00een care nu mai dorim petrol \u0219i gaze naturale, ca \u015fi combustibili, inevitabil \u0219i produc\u021bia de sulf va sc\u0103dea.<\/p>\n<p>\u015ei aici apare problema. Sulful &#8211; u\u0219or transformat \u00een acid sulfuric &#8211; este necesar pentru crearea de \u00eengr\u0103\u0219\u0103minte \u0219i pentru extragerea metalelor grele din minereurile lor, \u00eenainte ca acestea s\u0103 poat\u0103 intra \u00een compozi\u0163ia bateriilor, turbinelor eoliene \u0219i altor componente ale vehiculelor electrice. Chiar dac\u0103 produc\u021bia de sulf va sc\u0103dea, cererea de acid sulfuric va cre\u0219te. Iar aceasta este o re\u021bet\u0103 pentru o criz\u0103 iminent\u0103, avertizeaz\u0103 cercet\u0103torii \u00eentr-o lucrare publicat\u0103 pe 21 august \u00een revista <strong><em>&#8222;The Geographical Journal&#8221;<\/em><\/strong>.<\/p>\n<p>Ast\u0103zi, lumea folose\u0219te 246 de milioane de tone de acid sulfuric \u00eentr-un an. Cercet\u0103torii estimeaz\u0103 c\u0103 acest num\u0103r ar putea cre\u0219te la 400 de milioane de tone p\u00e2n\u0103 \u00een 2040. Acidul sulfuric este necesar pentru extragerea metalelor grele precum nichel, cobalt \u0219i elemente rare pentru baterii, magne\u021bi \u0219i alte tehnologii de energie regenerabil\u0103. Nevoile lumii cresc &#8211; de la 246 de milioane de tone ast\u0103zi la 400 de milioane de tone p\u00e2n\u0103 \u00een 2040 &#8211; dar sulful este cel mai ieftin ob\u021binut ca produs secundar al rafin\u0103riilor de petrol.<\/p>\n<p>A\u015fadar, c\u00e2nd vine vorba de energie regenerabil\u0103, acidul sulfuric are o utilizare foarte util\u0103. Extragerea metalelor grele, cum ar fi nichel, cobalt \u0219i elemente rare, se bazeaz\u0103 pe procese chimice care folosesc acid sulfuric pentru a separa metalele de minereurile lor. Acele metale grele sunt elemente cheie \u00een bateriile de litiu-ion, motoare electrice \u0219i alte tehnologii cruciale pentru tranzi\u021bia la surse regenerabile. \u00cen plus, sulful are \u0219i alte roluri. Poate chiar mai important dec\u00e2t sursele regenerabile, acidul sulfuric este un element cheie \u00een fabricarea \u00eengr\u0103\u0219\u0103mintelor. Acidul sulfuric intr\u0103 \u00een compozi\u0163ia biocombustibili, iar sulful este folosit pentru fabricarea cauciucului.<\/p>\n<p>Atunci de unde vine acest sulf? Cu mult timp \u00een urm\u0103, cea mai mare parte a lui provenea din minerit. \u00cen 1894, un chimist german pe nume Herman Frasch a creat un proces de ob\u0163inere a unui z\u0103c\u0103m\u00e2nt mineral care con\u021bine sulf prin pomparea acestuia cu ap\u0103 supra\u00eenc\u0103lzit\u0103. Procesul Frasch poate fi extrem de d\u0103un\u0103tor mediului \u00eenconjur\u0103tor \u0219i s\u0103n\u0103t\u0103\u021bii minelor. Mineralele care con\u021bin sulf tind adesea s\u0103 con\u021bin\u0103 metale toxice precum mercurul, arsenul \u0219i taliul. Procesul arunc\u0103, de asemenea, ap\u0103 uzat\u0103 care con\u021bine hidrogen sulfurat, ce are propriet\u0103\u021bi toxice similare cu monoxidul de carbon.<\/p>\n<p>P\u00e2n\u0103 \u00een anii 1950, lumea epuizase cele mai u\u0219or disponibile z\u0103c\u0103minte de sulf. Costurile miniere au crescut vertiginos, umfl\u00e2nd rapid pre\u021bul de pia\u021b\u0103 al elementului, fiind iminent\u0103 &#8222;foametea de sulf&#8221;. \u015ei astfel a venit o alt\u0103 idee de ob\u0163inere a sulfului industrial. Dintr-o coinciden\u021b\u0103, prezen\u021ba sulfului \u00een petrol \u00eengreuneaz\u0103 rafinarea acestuia \u00een motorin\u0103 \u015fi \u00een alte produse petroliere. Pentru a rezolva problema, rafin\u0103riile trebuie s\u0103 filtreze sulful, f\u0103c\u00e2ndu-l astfel disponibil pentru restul lumii. Ast\u0103zi, peste 80% din sulful mondial provine din aceast\u0103 metod\u0103.<\/p>\n<p>Dar, dac\u0103 combustibilii fosili care emit carbon dispar, \u00een mod normal \u015fi produc\u021bia de sulf v\u0103 sc\u0103dea drastic. Atunci, ce-am putea face? Lumea ar putea reveni la aprovizionarea cu sulf direct din mine. Dar este mai costisitor dec\u00e2t ob\u021binerea acestuia din petrol, iar procesul Frasch poart\u0103 o povar\u0103 ecologic\u0103 inacceptabil\u0103. De aceea, cercet\u0103torii spun c\u0103 este nevoie urgent\u0103 de cercetare pentru a dezvolta metode cu costuri reduse, cu impact redus asupra mediului, pentru extragerea cantit\u0103\u021bilor de sulf necesare economiei mondiale.<\/p>\n<p><em><strong>Sursa<\/strong><\/em> (traducerea \u015fi adaptarea proprie): studiul \u015ftiin\u0163ific <strong>&#8222;Sulfur: A potential resource crisis that could stifle green technology and threaten food security as the world decarbonises&#8221;<\/strong> (<a href=\"https:\/\/rgs-ibg.onlinelibrary.wiley.com\/doi\/10.1111\/geoj.12475\" target=\"_blank\" rel=\"noopener\"><strong>https:\/\/rgs-ibg.onlinelibrary.wiley.com\/doi\/10.1111\/geoj.12475<\/strong><\/a>)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Privi\u021bi tabelul periodic \u0219i g\u00e2ndi\u021bi-v\u0103 la elementele necesare pentru o planet\u0103 prosper\u0103 alimentat\u0103 cu energie regenerabil\u0103. Sulful probabil c\u0103 nu va fi primul care v\u0103 va veni \u00een minte. Reputa\u021bia nociv\u0103 a &#8222;elementului galben&#8221; rezult\u0103 din faptul c\u0103 cea mai &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"&#8222;Paradoxul sulfului&#8221;: Vrem s\u0103 sc\u0103p\u0103m de poluarea combustibililor fosili (petrol \u015fi gaze), dar avem nevoie de ei pentru a produce &#8222;energia curat\u0103&#8221;! Atunci, ce facem!?\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/paradoxul-sulfului-vrem-sa-scapam-de-poluarea-combustibililor-fosili-petrol-si-gaze-dar-avem-nevoie-de-ei-pentru-a-produce-energia-curata-atunci-ce-facem\/#more-82611\" aria-label=\"Cite\u0219te mai multe despre &#8222;Paradoxul sulfului&#8221;: Vrem s\u0103 sc\u0103p\u0103m de poluarea combustibililor fosili (petrol \u015fi gaze), dar avem nevoie de ei pentru a produce &#8222;energia curat\u0103&#8221;! Atunci, ce facem!?\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":82613,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11042],"tags":[5011,601,7585,2623,6549,5318,66,11043,8325,7112,2534,7114,2708,6743,3207,6437,4645,3234,5114,2525,5663,17868],"class_list":["post-82611","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fizica-chimie","tag-acid-sulfuric","tag-apa","tag-arsen","tag-baterie","tag-cauciuc","tag-cobalt","tag-energie","tag-fizica-chimie","tag-gaze-naturale","tag-ingrasaminte-chimice","tag-litiu","tag-mediu-inconjurator","tag-mercur","tag-metale","tag-mina","tag-monoxid-de-carbon","tag-nichel","tag-petrol","tag-rafinarie","tag-sulf","tag-taliu","tag-turbina","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>&quot;Paradoxul sulfului&quot;: Vrem s\u0103 sc\u0103p\u0103m de poluarea combustibililor fosili (petrol \u015fi gaze), dar avem nevoie de ei pentru a produce &quot;energia curat\u0103&quot;! 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