摘要
采用Ｍｏ及稀土元素对ＨＺＳＭ－５分子筛进行改性并用于丙烷的芳构化反应。考察了Ｍｏ含量、引入方法及反应条件对催化活性的影响。在Ｌａ、Ｃｅ、Ｎｄ、Ｓｍ、Ｄｙ等五种稀土元素中，以Ｌａ的改性效果最佳，在５５０℃、６００ｈ－１的反应条件下，Ｍｏ－ＬａＨＺＳＭ－５分子筛催化剂上丙烷转化率及芳烃选择性分别达到８８４３％、６８４７％。
Molybdenum species were introduced into HZSM-5 by means of impregnation and mechanical mixing methods, respectively The effects of Mo content, reaction contions and reaction time on stream on aromotization of propane were investigated Over Mo/HZSM-5 catalyst, the selectivity of aromatics was improved because dehydrogenation reaction was promoted and cracking reaction was prohabitted The catalyst obtained by mixing way has a higher stability compared with the impregnation one For the impregnation catalysts, the aromatization of propane was the best with Mo content of 2w% and under 550℃, 600h -1 The activity or stability of Mo/HZSM-5 was enhanced when rare earth elements such as lathanum, cerium, neodymium, samarium, dysprosium were incorporated Especialy, over the La-Mo/HZSM-5 zeolite catalyst, the propane conversion and aromatics selectivity attained 88 43%, 68 47%, respectively
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1999年第4期296-300,共5页
Journal of Fuel Chemistry and Technology
