稀土金属氧化物对Y分子筛吸附脱硫性能的影响

孙林平; 李飞; 张龙

稀土金属氧化物对Y分子筛吸附脱硫性能的影响

长春工业大学化工学院化学工艺系, 吉林长春 130012

基金项目: 长春工业大学科学研究发展基金(2011LG12).

详细信息

通讯作者:
张龙(1963-), 男, 教授, 从事精细化工的研究, Tel: 13504412257; E-mail: zhanglongzhl@163.com.

中图分类号: O643
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出版历程
- 收稿日期: 2012-08-13
- 修回日期: 2012-10-30
- 刊出日期: 2013-04-30

Effects of rare-earth metal oxides on the desulfurization of Y zeolite

Department of Chemical Technology, School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China

摘要

摘要: 以Y分子筛为母体,采用浸渍法制备了Y₂O₃/Y、CeO₂/Y和La₂O₃/Y三种吸附剂.以脱除正辛烷中的苯并噻吩为探针反应,考察了稀土金属氧化物负载量、吸附温度、吸附时间和剂油比对吸附剂脱硫性能的影响.结果表明,稀土金属氧化物最佳负载量为5%(质量分数),所得吸附剂在50 ℃、1 h、剂油比1∶30条件下,脱硫率均达到60%以上.甲苯的存在明显降低了吸附剂的脱硫性能.稀土金属氧化物在吸附过程中发生流失,在相同的条件下,三种稀土金属氧化物中,Y₂O₃的流失量最小,而CeO₂的流失量最大,CeO₂的流失量是Y₂O₃的10倍.
- 吸附脱硫 /
- Y分子筛 /
- 稀土金属氧化物 /
- 苯并噻吩 /
- 甲苯
Abstract: Y₂O₃/Y, CeO₂/Y and La₂O₃/Y samples were prepared by impregnation with Y zeolites as precursor. Removal of benzothiophene from octane was employed as probe reaction. The effects of loading amount of rare-earth metal oxide, adsorption temperature, adsorption time and ratio of adsorbent to oil on desulfurization have been investigated. The results showed that the optimum loading amount of the rare-earth metal oxide was 5%. More than 60% of benzothiophene was removed over the obtained samples at conditions of 50 ℃, 1 h and 1∶30 of adsorbent to oil ratio. Addition of toluene to the mixture of octane and benzothiophene depressed obviously the desulfurization capability of the samples. The rare-earth metal oxides were washed away during the desulfurization process. The loss amount of Y₂O₃ was the least, while CeO₂ was the largest. The loss amount of CeO₂ was 10 times larger than that of Y₂O₃.
- desulfurization /
- Y zeolites /
- rare-earth metal oxide /
- benzothiophene /
- toluene

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参考文献(22)

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