RT info:eu-repo/semantics/doctoralThesis
T1 Development of membrane processes for the selective separation of CO2 from biogas and biohydrogen
A1 Soto Guzmán, Marvelia Cenit
A2 Universidad de Valladolid. Escuela de Doctorado
K1 Química
K1 Gas separation
K1 Separación de gases
K1 Biohydrogen
K1 Biohidrógeno
K1 Biogas
K1 Biogás
K1 23 Química
AB Biogas and biohydrogen, due to their renewable nature and zero carbon footprint, are considered two of the gaseous biofuels that will replace conventional fossil fuels. Biogas from anaerobic digestion must be purified and converted into high-quality biomethane prior to use as a vehicle fuel or injection into natural gas networks. Likewise, the enrichment of biohydrogen from dark fermentation requires the removal of CO2, which is the main pollutant of this new gaseous biofuel. Currently, the removal of CO2 from both biogas and biohydrogen is carried out by means of physical/chemical technologies, which exhibit high operating costs and corrosion problems. Biological technologies for CO2 removal from biogas, such as photosynthetic enrichment and hydrogenotrophic enrichment, are still in an experimental development phase. In this context, membrane separation has emerged as the only physical/chemical technology with the potential to improve the performance of CO2 separation from both biogas and biohydrogen, and to reduce investment and operating costs, as a result of the recent advances in the field of nanotechnology and materials science. This thesis will focus on the fundamentals, potential and limitations of CO2 and H2 membrane separation technologies. The latest advances on membrane materials for biogas and biohydrogen purification will be systematically reviewed. In this thesis work, it was shown that, as in the case of Mixes Matrix Membranes (MMM), subtle changes in polymer chemistry as well as fillers can have important effects on the polymer-filler interactions and properties of TR-MMMs, both before and after thermal rearrangement. It was further demonstrated that advanced nanoporous materials currently being explored as fillers in MMMs can also be applied to improve the gas separation performance of polymers suitable for producing benzoxazoles, following the same strategy in MMMs.
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/60828
UL https://uvadoc.uva.es/handle/10324/60828
LA eng
NO Escuela de Doctorado
DS UVaDOC
RD 22-nov-2024