等离子体条件下添加气对丙烯氧化反应的影响

Influence of additive gas on propylene oxidation reaction under plasma

为研究等离子体条件下添加气对丙烯氧化反应的影响,在室温和大气压下,采用介质阻挡放电方法,考察还原性气体H2和惰性气体Ar添加量对丙烯氧化反应的影响.实验结果表明:二者的添加均可提高丙烯的转化率.在总流速108mL/min、放电电压21 kV、频率1.38 kHz的条件下,还原性气体H2的加入使得C3类氧化产物的总收率提高约27%;惰性气体Ar的加入不利于环氧丙烷(PO)、丙醛和丙烯醛的生成,但有利于异丙醇的生成.

The dielectric barrier discharge （DBD） method was used to investigate the influence of addition amount of reducing gas（H2 ） and inert gas （Ar） on propylene oxidation reaction under plasma at room temperature and atmospheric pressure. Experimental results show that the addition of both H2 and Ar can improve the conversion of propylene. The total yield of C3 partial oxidation products increases 27% with the addition of H2 when total flow rate is 108 mL/min, discharge frequency is 1.38 kHz and dielectric barrier discharge voltage is 21 kV. The selectivities of PO, propionaldehyde and acraldehyde decrease with the increase of Ar, but the selectivity of isopropylalcohol increases.