摘要
采用ＥＳＣＡ，ＴＰＲ及高压连续流动反应色谱等技术研究了在ＷＮｉ／Ａｌ２Ｏ３中引入超稳Ｙ型分子筛（ＵＳＹ）对载体表面性质及催化剂加氢脱氮活性的影响．结果表明：ＵＳＹ可明显改善Ｗ和Ｎｉ的分散状态，提高催化剂的总酸，并可调变Ｂ酸和Ｌ酸的分布；加入ＵＳＹ可提高催化剂的比表面积，但不利于发挥Ｎｉ的助剂作用；加入适宜量的ＵＳＹ，可明显提高催化剂的加氢脱氮活性．向Ａｌ２Ｏ３载体中引入１５％ＵＳＹ，可使催化剂脱氮率提高约２０％．
The surface property and the HDN activity of W Ni/Al 2O 3 catalyst by adding some ultrastable Y (USY) zeolite onto the support have been investigated by means of ESCA, TPR and high pressure continuous flow micro reactor techniques. The experimental results show that (1) USY can modify the dispersion of W and Ni on the support surface and the acidic property of the catalyst; (2) USY can increase the surface area of the catalyst, but decrease the effect of promoter Ni; (3) The HDN activity of the catalyst with proper amount of USY is increased. Under the given experimental conditions, the HDN activity of W Ni/Al 2O 3 USY catalyst with 15%USY has been increased by about 20%.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
1998年第5期415-418,共4页
关键词
钨
镍
超稳
Y型分子筛
加氢脱氮
催化剂
USY
Tungsten, Nickel, Alumina, Ultrastable Y zeolite, Hydrodenitrogenation
