文献类型：期刊文献

英文题名：Co-pyrolysis of polyphenylene sulfide with various plastics: Sulfur migration and interaction mechanism

作者：Sheng, Yue[1,2];Tang, Longfei[1,2];Pang, Weitong[1,2];Nie, Siman[3];Ding, Lu[1,2];Chen, Xueli[1,2];Song, Xudong[3];Wang, Fuchen[1,2]

机构：[1]Minist Educ, Engn Res Ctr Resource Utilizat Carboncontaining Wa, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, Shanghai 200237, Peoples R China;[3]Ningxia Univ, State Key Lab High Efficiency Utilizat Coal & Gree, Yinchuan 750021, Peoples R China

年份：2026

卷号：14

期号：2

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20260720050270);WOS:【SCI-EXPANDED(收录号:WOS:001688438600001)】；

基金：This work was supported by the project of the National Key Research and Development Program of China (2024YFB4006701) , the National Natural Science Foundation of China (22108081) and the Fundamental Research Funds of the Central University (JKB01251524) .

语种：英文

外文关键词：Co-pyrolysis; Sulfur migration; Polyphenylene sulfide; Plastic composition

摘要：As a high-performance sulfur-containing plastic, polyphenylene sulfide (PPS) is widely utilized, while thermochemical methods for the clean and efficient recycling of mixed waste plastics containing PPS remain underdeveloped. The sulfur migration and interaction mechanism were investigated during the co-pyrolysis of PPS with various plastics (PE, PP, PS, PET) in this work. Results showed that 34.6 % sulfur in PPS was released as organic sulfur compounds (OSCs) into the pyrolysis tar during individual pyrolysis, and 49.7 % sulfur remained in the pyrolytic char. For co-pyrolysis, the scission of PPS chain was facilitated by the hydrogen-rich plastics (PE), which led to a 33.2 % increase in volatile sulfur compound emissions, particularly enhancing small-molecule OSCs in the tar. Conversely, the allyl radicals generated from PP underwent crosslinking with the volatiles of PPS, leading to a 19.2 % increase in thianthrene. The formation of polycyclic aromatic sulfur heterocycles was facilitated by 41.4 % through co-pyrolysis with PS, due to its aromatic structure. In contrast, the thermal decomposition of PPS and the migration of sulfur into the tar were inhibited (17.2 %) due to the physical encapsulation by the PET melt residue (15.9 wt%) formed at 600 degrees C. Furthermore, the sulfur oxidation was promoted by the oxygen-containing group of PET, which converted 16.4 % sulfur in char into S-oxides. Distribution of sulfur speciation in pyrolysis products mainly depended on the interaction between PPS and functional groups in plastics during co-pyrolysis. These findings elucidate the mechanism by which different functional groups in plastics influenced sulfur conversion during PPS pyrolysis, providing guidance for optimizing the waste plastic treatment.