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| 引用本文: | 石冈,蔡震,鲍晓军,范煜. Ti-Mg-Al复合氧化物催化材料的制备及其加氢脱硫性能[J]. 石油与天然气化工, 2013, 42(2): 112-118. |
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| Ti-Mg-Al复合氧化物催化材料的制备及其加氢脱硫性能 |
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石冈1,蔡震1,鲍晓军2,范煜1
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(1.中国石油大学(北京) 重质油国家重点实验室;2.中国石油大学(北京) 中国石油天然气集团公司催化重点实验室)
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| 摘要: |
| 采用pH值摆动法、并流沉淀法制备了Al2O3、TiO2-Al2O3二元复合物、TiO2-MgO-Al2O3 和MgO-TiO2-Al2O3三元复合物,并对以其为载体的催化剂进行了催化裂化重汽油加氢脱硫反应性能评价。结果 表明,在所制备的TiO2-Al2O3二元复合载体中,TiO2分散在Al2O3表面上,且随其含量的增加TiO2逐渐在Al2O3表面上富集；与TiO2-Al2O3二元复合载体相比,三元复合载体的总孔容和平均孔径减小,但是总酸量增加。相比较而言,TiO2-MgO-Al2O3三元复合载体基催化剂对催化裂化重汽油的脱硫率优于TiO2-Al2O3二元复合载体基催化剂,脱硫率在90%以上,且前者的烯烃饱和率也较低,表明该催化剂具有良好的加氢脱硫选择性。 |
| 关键词: pH值摆动法 并流沉淀法 Ti-Mg-Al 三元复合物 选择性加氢脱硫 |
| DOI：10.3969/j.issn.1007-3426.2013.02.003 |
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| Preparation and hydrodesulfurization performance of Ti-Mg-Al composite oxides |
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Shi Gang1,Cai Zhen1,Bao Xiaojun2,Fan Yu1
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(1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;2. The Key Laboratory of Catalysis, China National Petroleum Coporation, China University of Petroleum, Beijing 102249, China)
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| Abstract: |
| A series of Al2O3, TiO2-Al2O3 and TiO2-MgO-Al2O3 oxides were prepared by the pH swing method and the paralleled flow precipitation method, respectively, and their supported hydrodesulfurization catalysts for the hydro-upgrading of heavy fluid catalytic cracking naphtha were assessed. The characterization results showed that in the binary TiO2-Al2O3 supports, TiO2 is dispersed on the surface of Al2O3 and there is a surface enriching tendency of TiO2 with the increasing TiO2 content; compared with binary TiO2-Al2O3 supports, trinary TiO2-MgO-Al2O3 supports have relatively smaller pore volumes and diameters but higher acid amounts. The catalytic assessment results revealed that the catalysts supported on trinary TiO2-MgO-Al2O3 oxides demonstrated better hydrosulfurization performance,and gave a desulfurization ratio of >90% while presenting a lower olefin saturation. |
| Key words: pH swing method paralleled flow precipitation method trinary Ti-Mg-Al composite oxides selective hydrodesulfurization |
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