Abstract
The catalyst support with super hydrophilic surface facilitates uniform loading and firm adhesion of the catalyst. In this paper, ridged microstructures were fabricated on the surface of FeCrAl wire mesh (FeCrAl-WM) by UV-laser processing. The mechanism behind the formation of ridged microstructures was elucidated. The influence of scanning interval on the stacking and separation of recast layers was analyzed. The effects of laser processing parameters on surface roughness and hydrophilicity of FeCrAl-WM surface with ridged microstructures were investigated. By adjusting laser processing parameters, it is possible to regulate both the roughness factor and oxygen content of the FeCrAl-WM surface, thereby controlling its hydrophilicity and varying contact angles between 0° and 90°. Catalyst loading experiments were conducted on FeCrAl-WM after laser processing, followed by testing the performance of MSR microreactor for hydrogen production using FeCrAl-WM as a catalyst support material. At an inlet flow rate of 4 ml/h at 280 °C, a maximum hydrogen production rate of 0.21 mol/h was achieved with a methanol conversion rate reaching 91.5 %. We envision that the laser microprocessing offers a convenient and effective approach to develop super hydrophilic surface on FeCrAl-WM materials for use as Joule-heating catalyst support.
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