汽油小知識
2012-09-05煉油廠生產的汽油會隨著儲存時間之不同,時間越長越容易產生劣化或聚合成大分子如GUM狀物,這會造成引擎積渣問題,所以汽油中會添加抗氧化劑44PD以延長汽油之儲存時間!!!
請大家留意,建議加油時去找熱門的加油站,以確保油品新鮮度！！
以下是本公司代理Flexsys公司所提供之原文資料
Gasoline degradation is an expensive problem for refiners, marketers, customers:
Gasoline degradation is caused by oxidation, polymerization and condensation reactions, resulting in GUMS, high-molecular weight, insoluble compounds. This degradation can occur in all types of gasoline components but likely more in LCC* and HCC** naphthas which make up the bulk of unleaded gasoline; most oxygenates used as octane boosters increase the tendency for degradation.
To refiners,
gasoline degradation means off-specification product and expensive re-running and re-mixing to produce gasoline to specification.
To marketers,
gums result in frequent service-calls, front-page news and poor customer acceptance. A lower quality product handicaps distributors in a highly competitive market.
To car users,
carburetor or injection needles deposits result in rough idling or stalling, meaning increased fuel consumption and increased exhaust emissions; intake system deposits meaning reduced p ower, impaired drive ability and eventual failure; combustion chamber deposits result in ORI*** increased hydrocarbon emissions and abnormal combustion.
LCC* : Light Catalytic Cracked
HCC** : Heavy Catalytic Cracked
ORI*** : Octane Requirement Increase
Flexsys Santoflex antioxidant protects the quality of your gasolines:
Santoflex 44PD is an AMINE-based antioxidant and is very efficient particularly for gasolines with high OLEFINS content.
Santoflex 44PD offers the advantage to sweeten the sour, corrosive mercaptans by oxidizing them to odorless, harmless disulfides.
Why are amine-antioxidant preferred rather than a hindered phenol in actual, commercial gasolines?
Unleaded gasolines imply the use of alternative octane boosters such as methanol, ethanol, MTBE, TAME, ETBE ...
Catalytic cracked, olefin-rich gasolines in which formation of free radicals and peroxyradicals takes place readily, tend to form degradation products in any way, but in presence of oxygenates this tendency is greatly enhanced requiring compatible antioxidants of a well defined chemical structure such as Santoflex 44PD.
When the olefin content increases, Santoflex 44PD is much more efficient than the classical hindered phenols like BHT.
In the US and in Japan amines are mostly used for gasoline stabilization; in Western Europe amines-use goes hand in hand with catalytical cracked, unleaded gasoline.