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Citation: Wu Ji-Lan, Su Ya-Li, Qi Sheng-Chu, Wang Wen-Qing, Zhang Xu-Jia. Investigation of the Mechanism of Gamma Radiolysis of Ethanol[J]. Acta Physico-Chimica Sinica, ;1991, 7(01): 22-29. doi: 10.3866/PKU.WHXB19910104 shu

Investigation of the Mechanism of Gamma Radiolysis of Ethanol

1.
Department of Technical Physics, Peking University, Beijing

Received Date: 13 July 1989
Available Online: 15 February 1991

本文研究了氧、温度和4-甲基-4-苯基-2-戊酮(Mpp)对乙醇辐解的影响。Mpp在实验使用的浓度范围内对乙醛的G值没有影响, G(2,3-丁二醇)值随Mpp浓度增加而下降, 最后达0.9恒值。使用Mpp求得原初过程形成的G_(H_2)=1.9, 动力学处理求得G_H=2.4, k_(12)/k_(11)=(11.9±1.8)×10~3。
实验证明Mpp清除了体系中的H原子, 抑制了CH_3CHOH自由基的形成, 从而抑制了2,3-丁二醇的生成, 但不影响乙醛的产额。这一研究否定了传统文献所述的在γ辐解乙醇时相当量的羟乙基自由基歧化反应生成乙醛。
本文还对乙醇γ辐解机理进行了讨论, 并求得了乙醇辐解的物料平衡。
- Radiolysis of ethanol; Formation of 2,3-butanediol; Formation of acetaldehyde; Effect of oxygen; Effect of MPP
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