| 水对SBA-15负载的钴基费-托合成催化剂催化性能的影响 |
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| 引用本文： | 赵燕熹,张煜华,韦良,李金林. 水对SBA-15负载的钴基费-托合成催化剂催化性能的影响[J]. 中国科学:化学, 2014, 0(10): 1627-1632 |
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| 作者姓名： | 赵燕熹 张煜华 韦良 李金林 |
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| 作者单位： | 催化材料科学国家民委-教育部重点实验室;中南民族大学化学与材料科学学院; |
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| 基金项目： | 国家自然科学基金(21203253,21473259);湖北省重大科技创新计划(2013AGB002)资助 |
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| 摘 要： | 以SBA-15分子筛为载体,采用等体积浸渍法制备了负载量为20%的钴基催化剂,采用TEM、XRD、H2-TPR和N2物理吸附-脱附等方法对催化剂进行了表征,并在浆态床反应器中考察了水的加入对费-托合成反应性能的影响.结果表明,金属钴物种进入到SBA-15载体的孔道中;产物在孔道中的滞留以及水促进的金属钴物种的团聚,引起了催化剂活性的降低;水的加入有利于反应物和产物在孔道中的传输,增加CO的转化率;在SBA-15负载的钴基催化剂中,产物在孔道中的滞留对催化剂活性影响较大,引起的扩散限制是催化剂活性降低的重要原因.
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| 关 键 词： | 费-托合成 水的影响 SBA-15 钴 |
Effect of water on Fischer-Tropsch synthesis over SBA-15 supported cobalt catalysts |
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| ZHAO YanXi,ZHANG YuHua,WEI Liang,LI JinLin. Effect of water on Fischer-Tropsch synthesis over SBA-15 supported cobalt catalysts[J]. Scientia Sinica Chimica, 2014, 0(10): 1627-1632 |
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| Authors: | ZHAO YanXi ZHANG YuHua WEI Liang LI JinLin |
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| Affiliation: | (Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission ＆ Ministry of Education, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China) |
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| Abstract: | SBA-15 supported cobalt-based catalysts were prepared by incipient wetness impregnation method with a cobalt loading of 20%. The catalysts were characterized by TEM, XRD, temperature-programmed reduction, and N2adsorption-desorption techniques. The effect of the addition of water on the performance of catalysts in FTS was measured in a continuously stirred tank reactor. The results indicate that most of the Co3O4 nanoparticles were introduced into the SBA-15 channels. The CO conversion of 20% Co/SBA-15 increased upon the addition of water. The enhanced CO conversion by water addition was due to an improved diffusion effect of reactants and products in the pores. |
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| Keywords: | Fischer-Tropsch synthesis water effect SBA-15 Cobalt |
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