球形活性炭的孔道结构改性及其对乙炔氢氯化反应的影响  

Pore structure modification of spherical activated carbon and its effects on acetylene hydrochlorination

作　　者：韩伟杰[1] 代斌[1] 朱明远[1] 王绪根[1] 

机构地区：[1]石河子大学化学化工学院,新疆兵团化工绿色过程重点实验室-省部共建国家重点实验室培育基地,新疆石河子832003

出　　处：《功能材料》2013年第B12期201-204,共4页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2012CB720302);教育部长江学者和创新团队发展计划资助项目(IRT1161)

摘　　要：通过对市售球形活性炭浸渍Fe（NO3）。进行COz二次活化，使用不同活化条件制备得到具有不同孔径分布的球形活性炭，并研究了所制备的样品在乙炔氢氯化反应中的活性。利用扫描电镜（SEM）观察了样品表面形貌，采用BET法测试了样品改性前后孔道结构的变化，使用程序升温脱附（TPD）分析了样品改性前后吸附性能的变化，使用固定床装置对样品在乙炔氢氯化反应中的催化性能进行了测试。实验结果表明，球形活性炭通过浸渍0．3％的Fe（NO3）3，活化气体流量为C02150mL／min、N250mL／min时，二次活化能够将孔径扩大至6nm、中孔孔容达到0．21cm2／g、中孔含量为36％。将上述活化气体流量的样品用于乙炔氢氯化反应中，当反应条件为乙炔空速180h、温度180。C、n（HCl）。（C2H2）-1．05～1．1时，其初始转化率达到30％（比市售球形活性炭提高100％）。Commercial spherical activated carbon was reactivated in CO2 after being immersed m Pe（Nt）3 ）3- samples with different pore size distributions were prepared under different activation conditions, and their effects on acetylene hydrochlorination were investigated. The surface morphology of samples was observed by scanning electron microscopy （SEM） pore structures before and after modification were tested by BET; adsorption performances before and after modification were analyzed by temperature programmed desorption （TPD） ; the catalytic performances in acetylene hydrochlorination were investigated on a fixed bed reactor. The results show that at CO2 150 mL/min and N2 50 mL/min, the spherical activated carbons after being immersed in 0.3% Fe（NO3）3 were reactivated to generate pore size of 6 nm, mesopore volume of 0.21 cm3/g, and meso- pore content of 36%. At the above activation gas flows, acetylene airspeed of 180 h 1, 180 ℃, and n（HC1） ： n（C2H2） = 1.05-1. 1, the samples were used in acetylene hydrochlorination, and reached an initial conversion rate of 30%, which was 100% higher the commercial spherical activated carbon.

关 键 词：球形活性炭 孔道结构 改性 乙炔氢氯化 

分 类 号：TQ424.19[化学工程]