不同镍盐前驱物对CH_4-CO_2重整Ni/γ-Al_2O_3催化剂性能的影响

采用浸渍方法以γ Al2 O3为载体 ,以硝酸镍、氯化镍、醋酸镍为前驱盐分别制备了三种催化剂Ni N、Ni Cl、Ni Ac ,并应用于催化CH4 CO2 重整反应 ,考察了它们的反应性能 ,通过BET、TPR、XRD、XPS、TGA、H2 TPD等方法对催化剂进行了表征。结果表明 ,由不同镍盐制备的催化剂中 ,镍物种的存在状态明显不同 ,在催化剂的制备过程中镍盐中的阴离子影响着镍离子在催化剂中的分散及存在状态。三种催化剂中Ni N具有较好的催化性能和抑制积碳性能 ,这与Ni N中镍物种与载体之间产生较强相互作用、经还原后获得金属镍的分散度高、晶粒小密切相关。

环丙唑醇的新合成方法

Cyproconazole(5) is a good fungicide.In this paper,starting from p-chlorobenzonitrile and allylic bromide,the intermediate 1-(4-chlorophenyl)-2-cyclopropyl-1-ethanone(2) was obtained by Barbier-type reaction and Simmons-Smith reaction.The product 5 was synthesized form 2 via α-methyl reaction,Corey-Chaykovsky reaction,and substitution reaction with 1,2,4-triazole.The total yield was 30.8%.5 and all intermediates were characterized and confirmed with 1H NMR and MS spectra.This procedure was cost-effective and applicable on a multigram scale.