Banca de DEFESA: SAMUEL ALBERTO OUANA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE: SAMUEL ALBERTO OUANA
DATA: 17/02/2025
HORA: 14:00
LOCAL: Online
TÍTULO:

COMPARATIVE LIFE CYCLE ASSESSMENT OF HYDROGEN PRODUCTION METHODS: EUCALYPTUS BIOMASS GASIFICATION VS NATURAL GAS STEAM REFORMING IN BRAZILIAN CONDITIONS 

PALAVRAS-CHAVES:

Biomass gasification. Carbon emissions reduction. Sustainable energy. Energy transition, CO₂ capture and storage.

PÁGINAS: 94
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Mecânica
SUBÁREA: Engenharia Térmica
ESPECIALIDADE: Aproveitamento da Energia
RESUMO:

Hydrogen is emerging as a promising alternative to conventional fuels, with significant potential to support the energy transition and reduce carbon emissions. However, most hydrogen (H₂) production still relies on fossil sources, necessitating the exploration of greener alternatives. Among these, hydrogen production from the gasification of biomass, particularly eucalyptus, and steam methane reforming (SMR) of natural gas have gained attention. A life cycle assessment (LCA) was conducted to compare these technologies under Brazilian conditions, evaluating their environmental impacts across three scenarios: i) SMR of natural gas, ii) SMR-CCS - SMR integrated with carbon capture and storage (CCS), and iii) Gasification-WGS - eucalyptus gasification coupled with the water-gas shift reaction. Using ReCiPe's midpoint (H) method, nine key impact categories were analyzed, with global warming (GW) identified as the most critical. Results revealed that SMR and SMR-CCS produce 17.5 kg and 10.5 kg of CO₂ equivalent emissions, respectively, while the Gasification-WGS scenario emits only 1.84 kg of CO₂ equivalent, reducing emissions by approximately 89% compared to SMR. Despite its lower GW impact, the SMR-CCS scenario showed higher impacts in other categories, whereas the Gasification-WGS scenario had increased eutrophication due to nutrient runoff from eucalyptus cultivation. These findings underscore the importance of assessing hydrogen production pathways comprehensively to ensure their sustainability and environmental viability. Biomass gasification, supported by photosynthesis and CCS technologies, demonstrates significant potential as a clean energy vector in the decarbonization scenario.

MEMBROS DA BANCA:
Externo à Instituição - RAFAEL SILVA CAPAZ - UNIFEI - UNI (Membro)
Externo à Instituição - MSTEUS HENRIQUE ROCHA - UFRPE (Suplente)
Presidente - MARCIO MONTAGNANA VICENTE LEME (Membro)
Interno - DIMAS JOSE RUA OROZCO (Membro)
Externo ao Programa - BRUNA OLIVEIRA PASSOS E SILVA SIQUEIRA - DEG/EENG (Suplente)
Interno - ADRIANO VIANA ENSINAS (Membro)