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Title
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Comparative life cycle assessment of three biohydrogen pathways
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Author
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Abstract
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| A life cycle assessment was performed to quantify and compare the energetic and environmental performances of hydrogen from wheat straw (WS-H2), sweet sorghum stalk (SSS-H2), and steam potato peels (SPP-H2). Inventory data were derived from a pilot plant. Impacts were assessed using the impact 2002+ method. When co-product was not considered, the greenhouse gas (GHG) emissions were 5.60 kg CO2eq kg−1 H2 for WS-H2, 5.32 kg CO2eq kg−1 H2 for SSS-H2, and 5.18 kg CO2eq kg−1 H2 for SPP-H2. BioH2 pathways reduced GHG emissions by 5256% compared to diesel and by 5457% compared to steam methane reforming production of H2. The energy ratios (ER) were also comparable: 1.08 for WS-H2, 1.14 for SSS-H2 and 1.17 for SPP-H2. A shift from SPP-H2 to WS-H2 would therefore not affect the ER and GHG emissions of these BioH2 pathways. When co-product was considered, a shift from SPP-H2 to WS-H2 or SSS-H2 decreased the ER, while increasing the GHG emissions significantly. Co-product yield should be considered when selecting BioH2 feedstocks. |
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Language
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English
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Source (journal)
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Bioresource technology. - Barking
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Publication
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Barking
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2011
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ISSN
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0960-8524
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DOI
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10.1016/J.BIORTECH.2010.10.139
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Volume/pages
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102
:3
(2011)
, p. 2684-2694
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ISI
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000286904500078
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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