石油化工高等学校学报

石油化工高等学校学报

• 石油化工 • 上一篇    下一篇

乙炔氢氯化反应无汞催化剂的制备及应用

  

  1. ( 1. 辽宁石油化工大学辽宁省石油化工催化科学与技术重点实验室,辽宁抚顺1 1 3 0 0 1;
    2. 抚顺师范高等专科学校生化系, 辽宁抚顺1 1 3 0 0 6
  • 收稿日期:2013-02-20 修回日期:2013-03-18 出版日期:2013-12-25 发布日期:2014-06-09
  • 作者简介:张磊( 1 9 8 6 - ) , 男, 湖北襄阳市, 在读硕士。
  • 基金资助:
    国家自然基金资助项目( 2 1 0 7 6 1 0 0) ; 辽宁省高校创新团队支持计划资助项目( 2 0 0 7 T 1 0 7) 。

Preparation and Application of NonMercury Catalysts for Acetylene Hydrochlorination

  1. (1.Liaoning Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University, Fushun Liaoning 113001, China; 2.Department of Biochemistry, Fushun Normal College, Fushun Liaoning 113006, China)
  • Received:2013-02-20 Revised:2013-03-18 Online:2013-12-25 Published:2014-06-09

摘要: 以硝酸处理过的椰壳活性炭做载体, 锡、 铜等金属氯化物为活性组分, 采用等体积溶液浸渍法制备了用于乙炔氢氯化反应的无汞S n - C u / C催化剂和不同助剂添加量的S n - C u M / C催化剂, 并用X射线衍射( XR D) 和物理化学吸附仪对其进行了表征。采用常压固定床反应器考察了催化剂的优化反应工艺条件。结果表明. 采用酸处理后的活性炭的比表面积与孔径都有明显增加, 且催化剂的金属活性组分在载体表面分散均匀。优化反应工艺条件为: 反应温度1 7 0, 体积空速3 0h-1, 原料配比V( HC l ) / V( C 2H2) =1. 0 5。在该条件下考察催化剂的催化反应性能, 结果表明, S n - C u / C催化剂的初活性可以达到9 8%以上, 选择性达9 9%。在添加不同量的助剂组分后, 在同样反应条件下, 催化剂的活性及稳定性均有较大提高, 在反应近2 0h后, 催化剂乙炔转化率达到9 8%, 选择性达到9 9%。

关键词: S n- C u / C催化剂, 助剂, 乙炔, 氢氯化, 氯乙烯

Abstract: SnCu/C and SnCuM/C catalysts with different auxiliaries for hydrochlorination of acetyleneactivated carbon as the carrier has been treated with the concentrated nitric acid and Sn,Cu and other metal chloride as active componentswere prepared by the wet equivalentvolume impregnation and characterized by XRD and BET. The analytical results indicate that the active constituents are highly dispersed on the surface of carrier which having larger surface area and bigger bore diameter after acidic treatment. Then, optimized reaction conditions,reaction temperature 170 ℃,space velocity 30 h-1,feed volume ratio V(HCl)/V(C2H2) 1.05,were obtained in atmospheric fixed bed reactor. The catalytic performances of SnCu/C and SnCuM/C catalysts with different auxiliaries was investigated under the optimized reaction conditions. The experimental results show that SnCu/C catalyst has good initial activity,the acetylene conversion and the selectivity of chloroethylene is over 980%.The catalytic activity and stability are improved after adding to the different auxiliaries under the metionaboved reaction conditions,the acetylene conversion and the selectivity of chloroethylene is over 98.0%. 

Key words: SnCu/C catalyst,    ,  Auxiliaries,    , Acetylene,    , Hydrochlorination,   ,  Chloroethylene