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Rhenium
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Rhenium Application
Rhenium is mainly used as a catalyst in the petroleum industry.
It has a high melting point and it is a major high temperature instrument material.
Rhenium has high electron emission properties and it is widely used in radio, television and vacuum technology.
Rhenium and rhenium alloys can be used as electron tube components and ultra-high temperature heaters to evaporate metals.
Rhenium and its alloy can be used to make tap water pen tip and high temperature thermocouple. It can also be used as catalysts in alcohol dehydrogenation, synthetic ammonia, etc. Alloys containing rhenium can withstand high temperatures. The practical application of Rhenium is still to be developed because of its scattering and high prices. It is also used to make the shells of electric filaments, artificial satellites, rockets and protective plates of nuclear reactor, etc.
Effects of Rhenium
The phenomenon that rhenium can improve the strength of the tungsten, molybdenum, chromium and plastic is called "rhenium effect". Adding a small amount (3% ~ 5%) of rhenium increases the starting temperature of tungsten recrystallization by 300 ℃ ~ 500 ℃. W - Re and Mo - Re alloy have good high temperature strength and plasticity, they can be processed into targets, plates, wires and rods used in aerospace, aviation high temperature structure (nozzle, thermal protective screen, etc.), elastic components and electronic components. Rhenium (Re) has influence on the single crystal superalloy microstructure, mechanical properties, unstable phase and single crystal defects, and it lead the direction of future research.
Pure rhenium and its compounds have excellent catalytic activity (rhenium is highly selective in many chemical reactions) , they are often used as catalysts in petrochemical industry.
Catalytic reforming is one of the petroleum refining processes, which is an important way to improve the quality of gasoline and to produce petrochemical raw materials. As a catalyst, rhenium platinum alloy can improve the depth of the reaction and increase the yield of gasoline, aromatic hydrocarbon and hydrogen in the catalytic reforming process. In addition, rhenium can be used as a catalyst for vehicle exhaust purification, while rhenium sulfide as a hydrogenation catalyst for cresol and lignin.
