吸附法控制航空煤油中微生物的研究

Microorganisms control in aviation kerosene by adsorption

航空煤油中的水质量浓度对微生物的生长影响显著,而微生物对飞机的危害非常严重。水质量浓度越高,微生物含量越多,对飞机的危害也就越大。与传统的添加抗微生物添加剂等化学方法相比,利用硅胶和3A,4A,5A和13X 4种型号分子筛作为航空煤油中的水吸附剂,由静态吸附实验得出:选择3A分子筛作为吸附剂,吸附时间为180 min、每100 mL航空煤油吸附剂投入量为2 g和粒径为80目,此时除水效果最佳,能将航空煤油的水质量浓度从1.2×10-4mg/L降为8×10-6mg/L;同时以航空煤油中的微生物为指标,通过以上改进优化条件能够将航空煤油中微生物从1 000个/mL降为5个/mL或者无菌状态。

The mass concentration of water in kerosene has a significant effect on the growth of microorganisms which harm aircrafts seriously. The higher water mass concentration, the more microorganisms, so the more seriously aircrafts are harmed. Compared with the conventional anti-microbial chemical additives, silica gel and four types of molecular sieve 3A, 4A, 5A, 13X were taken as adsorbents in a series of static adsorption experiments to remove water contained in kerosene. The results show that the best conditions for removing water in kerosene are as follows： 3A molecular sieve as adsorbent, the adsorption time of 180 min, the adsorbent dosage of 2 g in 100 mL aviation kerosene, the grain diameter of 80 mesh. Under these conditions, the water contained in kerosene can be reduced from 1.2 ×10^-4 mg/L to 8×10^-6 mg/L. And the content of microorganisms can be reduced from 1 000 piece/mL to 5 pieee/mL or to aseptic condition when using the content of microorganisms as the indicator.