摘要
采用浸渍法制备了K-MCM-41介孔催化剂,并用XRD、N_2吸附-脱附、及TEM等技术手段对催化剂进行了表征。实验发现:K在催化剂中高度分散且催化剂能够保持规整的六方介孔结构,但随着K负载量的升高催化剂比表面积及孔容下降、孔径变小;催化剂上强碱中心随着K含量的升高不断升高,K的掺杂量为6%时催化剂上强碱中心饱和;脱除异戊二烯中环戊二烯的实验结果表明,适宜的K负载量为6%、吸附温度为20℃,催化剂具有良好的再生性能。
A series of K-MCM-41 catalysts were prepared by impregnation method and characterized by XRD,N_2 adsorption-desorption and TEM.The characterization results showed that the catalysts could still maintain hexagonal mesoporous structure after the introduction of K while the specific surface area,pore volume and pore diameter decreased with the K content.The amount of strong base sites increased with the K content and became saturated over 6 K-MCM-41 sample.The experiments results showed that the cyclopentadiene removal rate and overall cyclopentadiene removal ratio could be promoted by increasing the K content,the best adsorption performance for removing cyclopentadiene in isoprene at 20℃ and supported K 6%.The catalytic performance remained stable and could be thoroughly recovered after regeneration.
作者
张倩
李沛东
Zhang Qian;Peidong(Crafts Room of 3rd Oil Production Plant of CNPC,Qinghai Oil field Company,Haixi 816400,Qinghai,China;HSE Department of 4th Oil Production Plant of CNPC,Qinghai Oil field Company,Haixi 816400,Qinghai,China)
出处
《精细石油化工》
CAS
CSCD
北大核心
2018年第5期41-45,共5页
Speciality Petrochemicals
关键词
钾
分子筛
异戊二烯
环戊二烯
吸附
potassium
molecular sieve
isoprene
cyclopentadiene
adsorption
