Comment on “How green is blue hydrogen?”

dc.contributorAalto Universityen
dc.contributor.authorRomano, Matteo C.en_US
dc.contributor.authorAntonini, Cristinaen_US
dc.contributor.authorBardow, Andréen_US
dc.contributor.authorBertsch, Valentinen_US
dc.contributor.authorBrandon, Nigel P.en_US
dc.contributor.authorBrouwer, Jacken_US
dc.contributor.authorCampanari, Stefanoen_US
dc.contributor.authorCrema, Luigien_US
dc.contributor.authorDodds, Paul E.en_US
dc.contributor.authorGardarsdottir, Stefaniaen_US
dc.contributor.authorGazzani, Matteoen_US
dc.contributor.authorJan Kramer, Gerten_US
dc.contributor.authorLund, Peter D.en_US
dc.contributor.authorMac Dowell, Niallen_US
dc.contributor.authorMartelli, Emanueleen_US
dc.contributor.authorMastropasqua, Lucaen_US
dc.contributor.authorMcKenna, Russell C.en_US
dc.contributor.authorMonteiro, Juliana Garcia Moretz Sohnen_US
dc.contributor.authorPaltrinieri, Nicolaen_US
dc.contributor.authorPollet, Bruno G.en_US
dc.contributor.authorReed, Jeffrey G.en_US
dc.contributor.authorSchmidt, Thomas J.en_US
dc.contributor.authorVente, Jaapen_US
dc.contributor.authorWiley, Dianneen_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorNew Energy Technologiesen
dc.contributor.organizationPolytechnic University of Milanen_US
dc.contributor.organizationSwiss Federal Institute of Technology Zurichen_US
dc.contributor.organizationRuhr University Bochumen_US
dc.contributor.organizationImperial College Londonen_US
dc.contributor.organizationUniversity of California, Irvineen_US
dc.contributor.organizationFondazione Bruno Kessleren_US
dc.contributor.organizationUniversity College Londonen_US
dc.contributor.organizationUtrecht Universityen_US
dc.contributor.organizationNetherlands Organisation for Applied Scientific Researchen_US
dc.contributor.organizationNorwegian University of Science and Technologyen_US
dc.contributor.organizationUniversité du Québec à Trois-Rivièresen_US
dc.contributor.organizationPaul Scherrer Instituteen_US
dc.contributor.organizationSustainable Technologies for Industrial Processesen_US
dc.contributor.organizationUniversity of Sydneyen_US
dc.descriptionPublisher Copyright: © 2022 The Authors. Energy Science & Engineering published by the Society of Chemical Industry and John Wiley & Sons Ltd.
dc.description.abstractThis paper is written in response to the paper “How green is blue hydrogen?” by R. W. Howarth and M. Z. Jacobson. It aims at highlighting and discussing the method and assumptions of that paper, and thereby providing a more balanced perspective on blue hydrogen, which is in line with current best available practices and future plant specifications aiming at low CO2 emissions. More specifically, in this paper, we show that: (i) the simplified method that Howarth and Jacobson used to compute the energy balance of blue hydrogen plants leads to significant overestimation of CO2 emissions and natural gas (NG) consumption and (ii) the assumed methane leakage rate is at the high end of the estimated emissions from current NG production in the United States and cannot be considered representative of all-NG and blue hydrogen value chains globally. By starting from the detailed and rigorously calculated mass and energy balances of two blue hydrogen plants in the literature, we show the impact that methane leakage rate has on the equivalent CO2 emissions of blue hydrogen. On the basis of our analysis, we show that it is possible for blue hydrogen to have significantly lower equivalent CO2 emissions than the direct use of NG, provided that hydrogen production processes and CO2 capture technologies are implemented that ensure a high CO2 capture rate, preferably above 90%, and a low-emission NG supply chain.en
dc.description.versionNon peer revieweden
dc.identifier.citationRomano, M C, Antonini, C, Bardow, A, Bertsch, V, Brandon, N P, Brouwer, J, Campanari, S, Crema, L, Dodds, P E, Gardarsdottir, S, Gazzani, M, Jan Kramer, G, Lund, P D, Mac Dowell, N, Martelli, E, Mastropasqua, L, McKenna, R C, Monteiro, J G M S, Paltrinieri, N, Pollet, B G, Reed, J G, Schmidt, T J, Vente, J & Wiley, D 2022, ' Comment on “How green is blue hydrogen?” ', Energy Science and Engineering, vol. 10, no. 7, pp. 1944-1954 .
dc.identifier.otherPURE UUID: c6cc8866-2442-45c2-a41e-5da0817f9176en_US
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dc.publisherJOHN WILEY & SONS
dc.relation.ispartofseriesEnergy Science and Engineeringen
dc.relation.ispartofseriesVolume 10, issue 7en
dc.subject.keywordcarbon captureen_US
dc.subject.keywordnatural gasen_US
dc.titleComment on “How green is blue hydrogen?”en