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Ocena cyklu życia produkcji ekologicznego wodoru z surowców odnawialnych
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ISBN10: 6630041194
ISBN13: 9786630041194
Publisher: Wydawnictwo Nasza Wiedza
Published: Sep 21 2026
Pages: 76
Weight: 0.25
Height: 0.18 Width: 6.00 Depth: 9.00
Language: Polish
ISBN13: 9786630041194
Publisher: Wydawnictwo Nasza Wiedza
Published: Sep 21 2026
Pages: 76
Weight: 0.25
Height: 0.18 Width: 6.00 Depth: 9.00
Language: Polish
Wodór jest raczej nośnikiem energii niż pierwotnym źródlem energii. Jego wplyw na środowisko zależy zatem od systemu energetycznego i materialowego wykorzystywanego na wcześniejszych etapach lańcucha dostaw, slużącego do jego produkcji, przetwarzania i dostarczania. Wodór można wytwarzac z gazu ziemnego, węgla, biomasy, poprzez elektrolizę wody lub w polączeniu z tymi metodami. Elektroliza oparta na energii odnawialnej wykorzystuje energię elektryczną wytworzoną z zasobów odnawialnych do rozdzielania wody na wodór i tlen. Gdy energia elektryczna ze źródel odnawialnych jest rzeczywiście niskoemisyjna i uwzględnia się caly lańcuch wartości, ta metoda może zapewnic znacznie mniejszy ślad węglowy niż w przypadku konwencjonalnego wodoru pochodzącego z paliw kopalnych. Podstawowa reakcja elektrochemiczna przebiega zgodnie z równaniem: 2H₂O → 2H₂ + O₂. Termodynamiczna minimalna praca elektryczna jest powiązana ze zmianą energii swobodnej Gibbsa w tej reakcji, natomiast praktyczne elektrolizery wymagają dodatkowej energii ze względu na straty aktywacyjne, omowe i związane z przenoszeniem masy. Dlatego też w ocenie cyklu życia nie wolno traktowac teoretycznej energii reakcji jako rzeczywistego zapotrzebowania na energię elektryczną. Realistyczny bilans powinien uwzględniac zużycie w ogniwach, energię elektryczną na potrzeby pomocnicze, uzdatnianie wody, chlodzenie, elektronikę mocy oraz straty eksploatacyjne.
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