铈盐类型对乙苯脱氢催化剂性能的影响

Effect on performance of ethylbenzene dehydronation catalyst by cerium salt

研究了氧化铈前体硫酸铈、草酸铈和硝酸铈对乙苯脱氢催化剂性能的影响,结果表明:加入硫酸铈,催化剂的活性和选择性均偏低;而分别加入草酸铈和硝酸铈对催化剂的性能更有利,特别是将二者以70%与30%复配后使用,乙苯转化率达79%以上,苯乙烯选择性达95%以上,同时经1 000 h寿命考察催化剂性能稳定。

The influence of the precursor of cerium oxide （cerium sulphate, cerium oxalate and cerium nitrate） on the performance of ethylbenzene dehydrogenation catalyst was investigated. The results showed that the activity and selectivity became lower than normal when cerium sulfate was added in, but became much better when cerium oxalate or cerium nitrate was added in, especially when these two were used together at a ratio of 70/30. The conversion of ethylbenzene reached above 79%, and the selectivity of styrene reached above 95%. At the same time, the performance of the catalyst was good after the 1000h lifetime test.