Journal
APPLIED CATALYSIS A-GENERAL
Volume 661, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcata.2023.119241
Keywords
Methanol reforming; Photocatalytic H-2 production; Reactor design; Optimization; Semiconductor photocatalysis
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Photo-assisted methanol reforming was used to produce hydrogen as an alternative to catalytic steam reforming. 1wt.% Au/TiO2 was used as a photocatalyst and immobilized on beads or plates. The optimized system showed significantly higher hydrogen production compared to previous studies using beads as catalyst support, and it was also more energy efficient.
Hydrogen is a promising energy carrier for the future. In this research, photo-assisted methanol reforming is used as an alternative to the energy-intensive catalytic steam-reforming to produce hydrogen. (1wt.%) Au/TiO2 was used as a photocatalyst and immobilized on beads or plates as support. This was used as packing in a reactor and optimized for hydrogen production based on a combination of light transmission and photocatalytic experiments. It was shown that the best single plate and beads can produce 54.7 mmol.g(-1).h(-1) and 12.0 mmol.g(-1).h(-1) of hydrogen respectively at the same light intensity. When comparing our work with the literature (in which beads were also used as catalyst support), the hydrogen production was at least 3.4 times higher, and the system was 633 more energy efficient based on the electrical consumption of the lamp. This flow setup can utilize a stream of liquid MeOH/H2O to produce a continuous supply of hydrogen, which is a promising way to power the future.
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