中国石油大学学报（自然科学版）Issue(5)：150-156,7.DOI:10.3969/j.issn.1673-5005.2015.05.021
La含量对Ni-S2 O82-/ZrO2-Al2 O3固体超强酸催化剂结构及异构性能的影响
Effects of La contents on the structure and isomerization performance over solid superacid Ni-S2 O8 2-/ZrO2-Al2 O3
摘要
Abstract
A series of La-Ni-S2O82-/ZrO2-Al2O3(La-Ni-SZA) catalysts with different La mass fractions were prepared, which were characterized by XRD, BET, H2-TPR, FTIR and Py-IR techniques. The effects of the La content on the cata-lyst structure and isomerization performance were studied using n-petane isomerization as a probe reaction. The results show that the addition of an appropriate amount of La decreases the ZrO2 particle size of tetragonal phase in the catalyst, which im-proves the redox properties of the catalyst, and promotes the formation of L acid and B acid. The total acidity of catalysts de-creases in the order of La(1. 0)-Ni-SZA>Ni-SZA>SZA. The La(1. 0)-Ni-SZA with La mass fraction of 1. 0% presents the best isomerization performance. At a reaction temperature of 140 ℃, a pressure of 2. 0 MPa, a hydrogen/hydrocarbon molar ratio of 4, and a MHSV of 1. 0 h-1 , the isopentane yield reaches a maximum of 66. 5%, which is significantly higher than the isopentane yield of Ni-SZA catalyst (55. 0%) at the optimal reaction temperature of 180 ℃.关键词
镧/镍/固体超强酸/正戊烷/异构化Key words
La/Ni/solid suoeracid/n-pentane/isomerization分类
化学化工引用本文复制引用
宋华,赵乐乐,宋华林,王娜,李锋..La含量对Ni-S2 O82-/ZrO2-Al2 O3固体超强酸催化剂结构及异构性能的影响[J].中国石油大学学报（自然科学版）,2015,(5):150-156,7.基金项目
中国石油天然气股份有限公司科技风险创新研究(07-06D-01-04-03-02) （07-06D-01-04-03-02）
