CoCr_(x)/SAPO-34催化剂的制备及对1,2-二氯乙烷的催化燃烧性能  

Preparation of CoCr_(x)/SAPO-34 Catalyst and Its Catalytic Combustion Performance for 1,2-Dichloroethane

作　　者：吴帅妮 朱鹏飞 石怀启 李娜 胡朝霞[1] 陈守文[1] WU Shuaini;ZHU Pengfei;SHI Huaiqi;LI Na;HU Zhaoxia;CHEN Shouwen(School of Biological and Environmental Engineering,Nanjing University of Science&Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学环境与生物工程学院,南京210094

出　　处：《高等学校化学学报》2021年第12期3731-3737,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51708295);中央高校基本科研业务费专项资金(批准号:30920021114)资助.

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CoCr_(x)/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,Co_(3)O_(4)负载量为20%(质量分数)、Cr掺杂量为0.06的CoCr_(0.06)/SAPO-34对1,2-DCE表现出优良的催化活性(T_(90)=290℃).在290℃下,CoCr_(0.06)/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.Catalytic combustion is one of the most efficient and economical methods for the treatment of chlori‐nated volatile organic compounds(CVOCs).For the exploration of high-efficient catalyst,SAPO-34 type mo‐lecular sieve was synthesized by hydrothermal method using triethylamine and tetraethylammonium hydroxide as composite templates,and subsequently used as support to prepare a series of CoCr_(x)/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 CoCr_(0.06)/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(T_(90)=290℃).At 290℃,the catalytic conversion of 1,2-DCE over CoCr_(0.06)/SAPO-34 can be maintained beyond 80%for 45 h,showing excellent stability and resistance to chlorine poisoning.

关 键 词：催化燃烧 SAPO-34 表面酸性 1 2-二氯乙烷 钴铬氧化物 

分 类 号：O643[理学—物理化学]