Park Young-Kwon, Siddiqui Muhammad Zain, Jeong Sangjae, Jang Eun-Suk, Kim Young-Min
School of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea.
Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon 24252, Republic of Korea.
J Nanosci Nanotechnol. 2021 Jul 1;21(7):3971-3974. doi: 10.1166/jnn.2021.19199.
The effect of seawater aging on the thermal and catalytic pyrolysis of polypropylene (PP) was investigated using a thermogravimetric analyzer and pyrolyzer-gas chromatography/mass spectrometry. Although the surface properties of PP were of the oxidized form by seawater aging, the decomposition temperature and non-catalytic pyrolysis products of PP were relatively unchanged largely due to seawater aging. The catalytic pyrolysis of seawater-aged PP over all the catalysts produced smaller amounts of aromatic hydrocarbons than that of fresh PP due to catalyst poisoning caused by the residual inorganics. Among the catalysts, microporous HZSM-5 (SiO₂/Al₂O₃:23) produced the largest amount of aromatic hydrocarbons followed in order by microporous HY(30) and nanoporous Al-MCM-41(20) from seawater-aged PP due to the high acidity and appropriate pore size for the generation of aromatic hydrocarbons.
使用热重分析仪和热解器-气相色谱/质谱联用仪研究了海水老化对聚丙烯（PP）热解和催化热解的影响。尽管海水老化使PP的表面性质呈氧化形式，但PP的分解温度和非催化热解产物在很大程度上相对未发生变化。由于残留无机物导致催化剂中毒，海水老化PP在所有催化剂上的催化热解产生的芳烃量均比新鲜PP少。在这些催化剂中，微孔HZSM-5（SiO₂/Al₂O₃:23）产生的芳烃量最大，其次是微孔HY(30)和纳米多孔Al-MCM-41(20)，这是因为它们对海水老化PP具有高酸度和适合芳烃生成的孔径。
