摘要
水热法合成了不同硅钕比的Nd-MCM-41介孔分子筛,并采用NH3程序升温脱附(NH3-TPD)及正丁胺指示剂法对合成样品的酸量、酸强进行分析表征。结果显示:当n(Si/Nd)从150降低到10,样品的酸含量逐渐增加;当n(Si/Nd)为30时,样品的酸强度最大。
Nd- MCM -41 Mesoporous Molecular Sieves with different Si/Nd （mol） ratios were synthesized by hydrothermal method. The acid amount and the acid strength were investigated by NH3 temperature programmed desorption （ NH3 - TPD） and n - butyl amine indicator method. The results indicated that when Si/Nd molar ratio of the samples drops from 100 to 10, the acid content of Samples increased gradually; The acid strength of the sample is the largest when Si/Nd molar ratio of the samples is 30.
出处
《化工时刊》
CAS
2013年第12期8-10,共3页
Chemical Industry Times
关键词
水热法
分子筛
酸量
酸强
hydrothermal synthesis mesoporous molecular sieve acid amount acid strength
