铈基催化剂催化聚乙烯低温燃烧性能

石油炼制与化工 ›› 2023, Vol. 54 ›› Issue (10): 102-109.

铈基催化剂催化聚乙烯低温燃烧性能

董奥¹,赵柳¹,周浩¹,宋成功¹,乔惠敏¹,侯旭^1,2

1. 长春工业大学化学工程学院
2. 长春工业大学材料科学高等研究院

收稿日期:2023-04-01 修回日期:2023-06-21 出版日期:2023-10-12 发布日期:2023-09-24
通讯作者: 董奥 E-mail:965437547@qq.com
基金资助:
国家自然科学基金青年基金项目;吉林省自然科学基金项目

CATALYTIC PERFORMANCE OF THE CERIUM-BASED CATALYSTS IN THE LOW-TEMPERATURE COMBUSTION OF POLYETHYLENE

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Received:2023-04-01 Revised:2023-06-21 Online:2023-10-12 Published:2023-09-24

摘要/Abstract

摘要： 为了改善高分子固体废物的燃烧过程，采用浸渍法制备了6种不同载体的铈基催化剂（Ce-Al₂O₃，Ce-SiO₂，Ce-Fe₂O₃，Ce-NiO，Ce-ZrO₂，Ce-La₂O₃），并通过XRD、SEM、N₂吸附-脱附和O2程序升温脱附（O₂-TPD）等方法分析其物理化学性质，进而用聚乙烯低温燃烧反应评价其催化性能。结果表明：在Ce-Al₂O₃表面形成了CeO₂颗粒，其表现出较强的氧吸附、活化能力；与无催化剂的聚乙烯燃烧相比，Ce-Al₂O₃催化聚乙烯燃烧同时提高了其燃烧速率和燃烧效率，从而提高了其燃烧过程的放热量；其中，Ce-Al₂O₃将聚乙烯燃烧的速率提高了2倍，CO和CO₂选择性提高了2.6倍。Ce-Al₂O₃循环使用6次，仍保持较好的催化性能，其催化聚乙烯燃烧反应的燃烧速率以及CO和CO₂选择性均高于无催化剂的聚乙烯燃烧过程。

关键词: 高分子固废, 聚乙烯, Ce-Al₂O₃, 催化燃烧, 循环使用

Abstract: In order to improve the combustion process of polymer wastes, six kinds of the cerium-based catalysts (Ce-Al₂O₃，Ce-SiO₂，Ce-Fe₂O₃，Ce-NiO，Ce-ZrO₂ and Ce-La₂O₃) were prepared by the impregnation method, the physical chemistry properties were analyzed by XRD, SEM, N₂ adsorption-desorption and O₂-TPD, and the catalytic performance was evaluated by using the low-temperature combustion of polyethylene. The results showed that CeO₂ particles were formed on the surface of Ce-Al₂O₃, which exhibited stronger oxygen adsorption and activation ability than that of polyethylene combustion without catalyst. Compared with polyethylene combustion without catalyst, Ce-Al₂O₃-catalyzed polyethylene combustion could increased both the combustion rate and the combustion efficiency, and thus increased the heat release in polyethylene low-temperature combustion, the selectivity of CO and CO₂ increased by 2.6 times. Ce-Al₂O₃ was reused for 6 times, and still maintained good catalytic performance. The combustion rate and the selectivity of CO and CO₂ in the catalytic polyethylene combustion reaction were higher than that of polyethylene combustion without catalyst.

Key words: polymer wastes, polyethylene, Ce-Al₂O₃, catalytic combustion, recycling

董奥赵柳周浩宋成功乔惠敏侯旭. 铈基催化剂催化聚乙烯低温燃烧性能[J]. 石油炼制与化工, 2023, 54(10): 102-109.

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