摘要
考察了焙烧条件对乙苯脱氢制苯乙烯催化剂耐水性能的影响。提高焙烧温度及延长焙烧时间有利于提高催化剂耐水浸泡能力 ,减缓水浸泡前后催化剂机械强度下降和磨耗率上升趋势。其原因可能是热处理条件的改变促进了Fe2 O3和K2 O间的相互作用 ,形成了大量对水十分稳定的多铁酸钾KFe11O17固熔体 ,从而提高了催化剂的耐水性 ,并能与比表面、孔结构、XRD、M ssbauer谱测定结果较好地关联。
Effect of calcination condition on the water tolerant stability of ethylbenzene dehydrogenation catalyst was studied. It was found that increase in calcination temperature and calcination time is favorable to enhancement of the water tolerant stability of the catalyst, inhibiting the decline in mechanical strength and increase in attrition when the catalyst is subjected to water atmosphere. Possible cause for this is that variation in calcination condition promotes formation of KFe 11 O 17 , which is stable to water owing to its structure. The experimental results were well explained by BET, pore structure, XRD and M?ssbauer measurement.
出处
《工业催化》
CAS
2002年第3期29-32,共4页
Industrial Catalysis
关键词
焙烧条件
乙苯脱氢
催化剂
热处理条件
耐水性能
ethylbenzene dehydrogenation
catalyst
calcination condition
water tolerant stability
