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

• 催化剂 • 上一篇    下一篇

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. 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: 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