Corrosion behavior of construction materials for ionic liquid hydrogen compressor

Abstract

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Power generation from waste heat: Ionic liquid‐based absorption cycle versus organic Rankine cycle

“…This reason as well as abundance of data motivated the choice of this particular IL with the chemically similar 1‐ethyl‐3‐methyl‐imidazolium bis(trifluoromethylsulfonyl)imide ([C 2 C 1 im][Tf 2 N], Figure 2), as the two APC solvents for this study. It is also important to note that commercially available stainless steel and nickel‐based alloys were observed to have low corrosion rates when in contact with [C 2 C 1 im][Tf 2 N], suggesting that this IL is compatible with these standard materials 14,15 . Similar reasons motivated the choice of the hydrofluorocarbon R‐134a as the fluid for the systems studied here.…”

Electrochemical Compression Technologies for High-Pressure Hydrogen: Current Status, Challenges and Perspective

“…Here, researchers have shown that the replacement of hydraulic oil with appropriate ionic liquids in a compressor can contribute to remarkable improvements in volumetric efficiency of approximately 10%-30% [42]. In addition, Kermani et al [43] SO 3 ], with significantly lower viscosity and corrosion current densities for AISI 316L can demonstrate desirable performances in ionic liquid hydrogen compressors. Moreover, Linde, a German international company, was able to develop a ionic liquid compressor with only eight moving units for hydrogen applications [44].…”

Electrochemical hydrogen compression and purification versus competing technologies: Part I. Pros and cons

“…Ionic liquids exhibit uncommon combination of characteristics, which are at the basis of the interest of ionic liquid compressors: low vapor pressure, great lubrication characteristic, high thermal stability, low gas solubility [43]. As a result, ionic liquid compressors display high efficiency and high compression ratio, especially for hydrogen, owing to the negligibly-low solubility of H2 in the appropriately-chosen ionic liquid [44].…”