【摘 要】
：
Cu-SAPO-34分子筛是一种高性能氮氧化物选择催化还原(SCR)催化剂,其载体SAPO-34对催化剂的氮氧化物催化消除活性有重大影响。采用水热合成法制备了n(硅)/n(铝)为0.4、0.6和0.
【机 构】
：
天津大学化工学院天津化学化工协同创新中心,
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Cu-SAPO-34分子筛是一种高性能氮氧化物选择催化还原(SCR)催化剂,其载体SAPO-34对催化剂的氮氧化物催化消除活性有重大影响。采用水热合成法制备了n(硅)/n(铝)为0.4、0.6和0.8的SAPO-34分子筛,X射线粉末衍射(XRD)和扫描电子显微镜(SEM)结果表明随着n(硅)/n(铝)的增大SAPO-34分子筛的结晶度增高,粒度减小;氨气程序升温脱附(NH3-TPD)结果显示n(硅)/n(铝)为0.8时分子筛的酸量最大。综上所述,n(硅)/n(铝)为0.8时Cu-SAPO-34催化剂表现出最佳的丙烯选择性催化还原(C3H6-SCR)性能。
Cu-SAPO-34 molecular sieve is a kind of high performance NOx selective catalytic reduction (SCR) catalyst. Its carrier SAPO-34 has a significant influence on the catalytic activity of nitrogen oxide catalytic elimination. SAPO-34 molecular sieves with n (Si) / n (Al) of 0.4, 0.6 and 0.8 were prepared by hydrothermal method. The results of XRD and SEM showed that with the increase of n (Si) / n (aluminum) increases the crystallinity of SAPO-34 zeolite increases, the particle size decreases; ammonia temperature programmed desorption (NH3-TPD) results show that the n (silicon) / n maximum. In summary, the Cu-SAPO-34 catalyst exhibits the best propylene-selective catalytic reduction (C3H6-SCR) performance at n (silicon) / n (aluminum) of 0.8.
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