Coke and Chemistry Pub Date : 2021-03-11 , DOI: 10.3103/s1068364x20110034 A. S. Maloletnev , N. T. Smagulova , Zh. K. Kairbekov
Abstract
The action of ozone in the low-temperature ozonization of coal tar from the semicoking of Shubarkol coal (Kazakhstan) is analyzed. Two mechanisms are possible: the electrophilic addition of ozone by π bonds to the molecules of unsaturated compounds; or radical-chain reactions with the formation of a broad spectrum of oxygen-bearing products (carboxylic acids, alcohols, aldehydes, etc.). The presence of each mechanism in tar ozonization is approximately the same. Ozone plays a positive role, by doubling the content of β fraction in the tar; and decreasing the content of the unreactive α1 fraction. The β fraction determines the binding and clinkering properties of pitch, while the α1 fraction prevents the appearance of anisometric needle-coke structures in pitch coking.
中文翻译:
臭氧在煤焦油低温臭氧化中的作用
摘要
分析了Shubarkol煤(哈萨克斯坦)的半焦化过程中臭氧在煤焦油的低温臭氧化中的作用。可能有两种机理:通过π键将臭氧亲电加成到不饱和化合物的分子上;或自由基链反应,形成多种含氧产物(羧酸,醇,醛等)。焦油臭氧化中每种机制的存在大致相同。臭氧通过使焦油中β组分的含量增加一倍而发挥积极作用;并降低非反应性α的含量1级分。的β分数确定间距的结合和渣特性,而α 1馏分防止在间距不等轴针状焦炭结构的外观焦化。