高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (12): 3731.doi: 10.7503/cjcu20210469

• 物理化学 • 上一篇    下一篇

CoCrx/SAPO-34催化剂的制备及对1,2-二氯乙烷的催化燃烧性能

吴帅妮, 朱鹏飞, 石怀启, 李娜, 胡朝霞(), 陈守文   

  1. 南京理工大学环境与生物工程学院, 南京 210094
  • 收稿日期:2021-07-05 出版日期:2021-12-10 发布日期:2021-09-16
  • 通讯作者: 胡朝霞 E-mail:huzhaoxia@njust.edu.cn
  • 基金资助:
    国家自然科学基金(51708295);中央高校基本科研业务费专项资金(30920021114)

Preparation of CoCrx/SAPO-34 Catalyst and Its Catalytic Combustion Performance for 1,2-Dichloroethane

WU Shuaini, ZHU Pengfei, SHI Huaiqi, LI Na, HU Zhaoxia(), CHEN Shouwen   

  1. School of Biological and Environmental Engineering,Nanjing University of Science & Technology,Nanjing 210094,China
  • Received:2021-07-05 Online:2021-12-10 Published:2021-09-16
  • Contact: HU Zhaoxia E-mail:huzhaoxia@njust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(51708295);the Fundamental Research Funds for the Central Universities, China(30920021114)

摘要:

以三乙胺和四乙基氢氧化铵为复合模板剂, 采用水热法合成出SAPO-34分子筛, 并以其为载体, 通过旋蒸浸渍法制备出CoCrx/SAPO-34系列催化剂(x=0.05~0.25). 考察了该类催化剂的结构及表面酸性, 并以1,2-二氯乙烷(1,2-DCE)为目标污染物, 评价了其催化燃烧性能. 结果表明, Co3O4负载量为20%(质量分数)、 Cr掺杂量为0.06的CoCr0.06/SAPO-34对1,2-DCE表现出优良的催化活性(T90=290 ℃). 在290 ℃下, CoCr0.06/SAPO-34对1,2-DCE的催化转化率能45 h保持80%以上, 表现出优良的稳定性以及耐氯中毒特性.

关键词: 催化燃烧, SAPO-34, 表面酸性, 1,2-二氯乙烷, 钴铬氧化物

Abstract:

Catalytic combustion is one of the most efficient and economical methods for the treatment of chlorinated volatile organic compounds(CVOCs). For the exploration of high-efficient catalyst, SAPO-34 type molecular sieve was synthesized by hydrothermal method using triethylamine and tetraethylammonium hydroxide as composite templates, and subsequently used as support to prepare a series of CoCrx/SAPO-34 catalysts (x=0.05—0.25) by rotary steam impregnation method. Structure and surface acidity of these catalysts were investigated, and their catalytic combustion performance was evaluated with 1,2-dichloroethane(1,2-DCE) as the target pollutant. The results showed that the CoCr0.06/SAPO-34 catalyst with the loading of 20%(mass fraction) Co3O4 and the Cr doping ratio of 0.06 exhibited excellent catalytic activity for 1,2-DCE(T90=290 ℃). At 290 ℃, the catalytic conversion of 1,2-DCE over CoCr0.06/SAPO-34 can be maintained beyond 80% for 45 h, showing excellent stability and resistance to chlorine poisoning.

Key words: Catalytic combustion, SAPO-34, Surface acidity, 1, 2-Dichloroethane, Cobalt chromium oxide

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