RT info:eu-repo/semantics/article
T1 Catalysis effect on CO2 methanation using MgH2 as a portable hydrogen medium
A1 Amica, Guillermina
A1 Rozas Azcona, Sara
A1 Aparicio Martínez, Santiago
A1 Gennari, Fabiana C.
K1 Química física
K1 Chemistry, Physical and theoretical
AB The feasibility of the reduction of CO2 to CH4 employing MgH2 in the presence and absence of cobalt as a catalyst was investigated for the first time, exploring different non-independent reaction conditions such as the grade of microstructural refinement, the molar ratio MgH2 : CO2, reaction time and temperature. For the un-catalyzed process a methane yield of 44.6% was obtained after 24 h of thermal treatment at 400 °C employing a molar ratio of 2 : 1, through a methanation mechanism that involves the direct reduction of CO2 and the generation of CH4via C as an intermediary. For the MgH2 catalyzed process a methane yield of 78% was achieved by heating at 350 °C for 48 h, 4 : 1 being the optimal molar ratio. The global mechanism corresponds to a Sabatier process favored by Co as an active catalyst, together with the reverse water gas shift reaction followed by methanation of CO in the presence of steam. On account of the fact that it was proved that the use of the catalyst allows lowering the operational temperature without collapsing the methane yield, this research provides interesting insight into a thermochemical method for CO2 reduction to CH4 employing a solid hydrogen storage medium as an H2 source.
PB Royal Society of Chemistry
SN 1463-9076
YR 2020
FD 2020-07
LK http://hdl.handle.net/10259/5539
UL http://hdl.handle.net/10259/5539
LA eng
NO The present work is part of the CO2MPRISE, ‘‘CO2 absorbing Materials Project-RISE’’, a project that has received funding from the European Union’s Horizon 2020 research and innovation programme, under the Marie Skłodowska-Curie Grant Agreement No. 734873. The work was also supported by CONICET (Consejo Nacional de Investigaciones Cientı´ficas y Te´cnicas), ANPCyT-(Agencia Nacional de Promocio´n Cientı´fica y Tecnolo´gica) and CNEA (Comisio´n Nacional de Energı´a Ato´mica)
DS Repositorio Institucional de la Universidad de Burgos
RD 23-abr-2024