Introduction to Perfluorohexanone(fK 5 1 12) and Heptafluoropropane(hFC 227ea)
Perfluorohexanone(FK 5 1 12) is a liquid at room temperature, easily vaporized and exists in gaseous state, and mainly relies on chemical inhibition and cooling to achieve the effect of fire extinguishing. In terms of environmental protection, FK-5-1-12 is a veritable green and environmentally friendly fire extinguishing agent. The fire extinguishing concentration of perfluorohexanone is 4-6%, and the safety margin is relatively high, which is relatively safe for the human body when used. FK5 1 12 can be safely stored and transported in ordinary containers under normal pressure, unlike other alternatives that require pressure vessels for storage and transportation.
Heptafluoropropane is a gas at room temperature, colorless, odorless, non-conductive and non-corrosive. Its fire extinguishing mechanism is mainly chemical inhibition, and HFC 227ea has a fast fire extinguishing speed, which is conducive to protecting precision electronic equipment and valuables, and has good cleanliness and insulation. In the early 1990s, industrially developed countries first used heptafluoropropane to replace the halon fire extinguishing system and achieved success.
At present, heptafluoropropane is the mainstream fire extinguishing agent in China.
Fire extinguishing applications
Fire extinguishing effect - equal
In terms of fire extinguishing effect, there is no obvious difference between perfluorohexanone and heptafluoropropane. According to Lin Zhen's article "Analysis and Research on Fire Suppression Technology of Lithium-ion Batteries in Energy Storage Systems", in the comparative experiment on the fire suppression effect of lithium-ion batteries, under the same conditions, heptafluoropropane extinguishes the fire faster, while perfluorohexanone has a better continuous cooling effect. However, both perfluorohexanone and heptafluoropropane can extinguish the flame of lithium batteries within half a minute, and both reduce the ambient temperature to about 80 degrees, achieving the purpose of suppressing re-ignition.
Fire extinguishing system solution-HFC-227ea is mature and reliable
The HFC227ea fire suppression system is divided into a piped system and a non-pipeline fire extinguishing device, with a wider range of application scenarios; in contrast, perfluorohexane currently only has a non-pipeline fire extinguishing device in China.
In addition, perfluorohexanone has higher requirements for water content control. Water content control needs to be done well during the filling and storage of fire extinguishing agents. If it is not properly controlled, acidic substances are easily produced and storage containers are corroded. The system design capability requirements are high. If the system design is improper, the fire extinguishing agent may not be effectively sprayed during spraying, thus affecting fire extinguishing.
System economy-HFC-227ea is cost-effective
According to experience, the fire extinguishing mass concentration of perfluorohexanone is higher than that of heptafluoropropane. To extinguish the same fire, a larger dose is needed at a time, and the price of the agent per unit weight is also higher than that of heptafluoropropane, so the overall cost-effectiveness is low.
Environmental performance-perfluorohexanone is environmentally friendly
In the atmosphere, perfluorohexanone can automatically decompose within five days, while heptafluoropropane can remain in the atmosphere for more than 30 years. In comparison, perfluorohexanone is more environmentally friendly.
conclusion
In terms of fire extinguishing effect, the overall effect of perfluorohexanone and heptafluoropropane is not much different, and each has its own advantages and disadvantages in details. In terms of application, perfluorohexanone and heptafluoropropane are both mainstream fire extinguishing agents: heptafluoropropane is mainly used in China, which is mainly the result of market selection. Heptafluoropropane has high cost performance, complete standards and mature technology. Most foreign countries use perfluorohexanone, mainly for environmental protection purposes. In the future, domestic perfluorohexanone fire extinguishing agents may also develop.
For fire-fighting applications in emerging fields, such as energy storage, both perfluorohexanone and heptafluoropropane have applications. Which solution will be adopted by the mainstream in the future will ultimately depend on market choice.
