文献类型：期刊文献

英文题名：Reaction mechanism of ethylene tar in the air atmosphere

作者：Chen, Rongqi[1];Guo, Yongchuan[1];Zhang, Yongzheng[1,2];Shen, Chunyin[1];Wang, Yanli[1];Zhan, Liang[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tech, Shanghai 200237, Peoples R China

年份：2023

卷号：353

外文期刊名：FUEL

收录：;EI(收录号：20232914399961);WOS:【SCI-EXPANDED(收录号:WOS:001046652900001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 22075081 and 51472086) and the Funda-mental Research Funds for the Central Universities (JKD01231701) .

语种：英文

外文关键词：Ethylene tar; Pitch; Air oxidation; Reaction mechanism

摘要：The reaction process of ethylene tar in the air atmosphere is very complex and contains numerous changes, which can be divided into three stages and should be further studied to guide the production of specific pitches. In the first stage, before about 310 degrees C, hydrogen at the benzylic position is firstly transformed into alcoholic hydroxyl, which is partly oxidized into C--O and COOH/C-O-C--O afterward. Most side chains except the C--O groups are gradually converted into COOH and -CH2-. Continuous dehydrogenation indicates highly condensed structures in the next stage, from 310 degrees C to around 380 degrees C. With the deprivation of CO2, further oxidization leads to the form of -CH2-, which becomes the critical linkage to create larger molecules. In the third stage, the weight of the sample is close to zero at about 550 degrees C. Under the direction of theory, getting pitches with the needed properties may be more accessible.