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ionic liquid piston compressor
An ionic liquid piston compressor, ionic compressor or ionic liquid piston pump is a hydrogen compressor based on an ionic liquid piston instead of a metal piston as in a piston-metal diaphragm compressor.〔(New developments in pumps and compressors using Ionic Liquids )〕
==Principle==
The ionic compressor exploits some gases' insolubility in ionic liquids - the virtually non-measurable vapor pressures in combination with a large temperature window for the liquid phase. The solubility of hydrogen in ionic liquids is very low. This insolubility is exploited by using a body of ionic liquid to compress hydrogen up to 1000 bar (14,500 psi)〔(Linde AG: Linde starts small-series production for hydrogen fuelling stations )〕 in hydrogen filling stations; and in so doing they reduced the number of moving parts from about 500 in a conventional reciprocating compressor down to 8.〔(Ionic liquid compressor )〕
Many seals and bearings were removed in the design as the ionic liquid does not mix with the gas. Service life is about 10 times longer than a regular reciprocating compressor with reduced maintenance during use, energy costs are reduced by as much as 20%. The heat exchangers that are used in a normal piston compressor are removed as the heat is removed in the cylinder itself where it is generated. Almost 100% of the energy going into the process is being used with little energy wasted as reject heat.〔(Linde Develops Ionic Compressor for More Efficient Compressed Hydrogen Storage )〕
Not to be confused with the ion pump or the ionic liquid ring pump.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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