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Life cycle assessment of biohydrogen produced from biogas
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| 2.74 MB | Adobe PDF |
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Orientador(es)
Resumo(s)
Hydrogen is a versatile and clean energy carrier that holds promise for a sustainable energy future.
Steam methane reforming (SMR) and water electrolysis are two prominent pathways for hydrogen production. SMR can run on biogas instead of fossil natural gas, while water electrolysis, particularly proton
exchange membrane (PEM) electrolysis, can rely on electricity from renewable energy sources. This
study assesses these hydrogen production methods using a Life Cycle Assessment (LCA) approach,
considering CO2eq emissions and demineralized water consumption. The Pedigree Matrix is employed
to rank the quality of the results. DWSIM, a chemical processes simulation open-software is used in
process simulation for the inventory of mass and energy flows. A sensitivity analysis is also performed
to: SMR operating temperature, number of water-gas shift reactors, off-gas use as heat source, different
IPCC (Intergovernmental Pannel on Climate Change) CO2 equivalency factors and different electricity
generation mix. The findings contribute to a better understanding of hydrogen production from biogas
by reforming in comparison to the other two methods by presenting higher needs of feedstock, intermediate water consumption and very low greenhouse gas (GHG) emissions.
Descrição
Tese de mestrado, Engenharia da Energia e Ambiente, 2023, Universidade de Lisboa, Faculdade de Ciências
Palavras-chave
Reformação a vapor Eletrólise da água PEM Matriz Pedigree Programa DWSIM código-aberto Teses de mestrado - 2024