Tanks-in-series model for high-temperature electrochemical hydrogen pump

A Pseudo-2D Model of the Reaction: Competitive Adsorption Kinetics for High-Temperature Electrochemical Hydrogen-Pump-Based Membrane Technology

“…Whole computational domain of the HT-EHP is shown in Figure , which can be divided into three dimensions with x , y , and z according to the real devices. Due to the large aspect ratio of the gas flow channel and the thin GDL in x and y dimensions, the hydrogen mass transfer in the gas flow channel and GDL can be simplified as a 1D, the entire model can be considered as a pseudo-2D or 1D + 1D process . Although compared to the traditional membrane reactor models based on computational fluid dynamics modeling that ignores detailed flow information, the pseudo-2D model based on basic mechanism has a higher solving speed (300 s for single j ave – E point) and scalability. , Reasonable assumptions reduce the demand of computing resource.…”

A Partial Element Stage Cut Electrochemical Hydrogen Pump Model for Hydrogen Separation and Compression

“…According to Butler -Volmer equation, the current density equations of anode and cathode are as follows: 23,40 𝑗 𝑎 (𝑥…”

“…42,43 Nordio et al 30 proved that RWGS is the main reason of EHP performance degradation, the inactivation of the catalyst is faster at 22.5 ℃ compared with 19 ℃ since RWGS is an endothermic reaction. Danilov et al 23 used empirical correlation for carbon monoxide surface coverage given by Rodrigues et al 44 to predict the high temperature EHP catalyst performance. In this work, the novel strategy based on RWGS kinetic equation Eqs.…”

“…A 1D + 1D model which solved by MATLAB ® was developed to compare hydrogen separation and compression performance with pressure swing adsorption (PSA), which showed EHP was convenient under small scale and high outlet hydrogen pressure field. Danilov et al 23 proposed a high temperature proton exchange membrane electrochemical hydrogen pump (HT-EHP) tanks-in-series mathematical model 45 based on mass and charge balance equations. Predicted polarization curve was consisted with the experiment data of Thomassen et al 20 Toghyani et al 24 established a three-dimensional numerical model based on finite volume method solved by ANSYS Fluent ® , which showed that hydrogen exergy loss decreased 53% when GDL thickness decreased from 0.5 mm to 0.2 mm at current density of 5000 A/m 2 .…”

Catalytic properties of borophene/MoS2 heterojunctions for hydrogen evolution reaction under different stacking conditions

“…Therefore, human society desperately needs a green and ideal energy source to solve the energy problem. [1][2][3][4][5][6] Hydrogen is the most abundant element in the universe. The mass energy density of hydrogen is almost three times higher than that of gasoline.…”