| 钾助剂对Co/SiO2费-托合成催化剂性质及反应性能的影响 |
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| 引用本文： | 高海燕,相宏伟,李永旺.钾助剂对Co/SiO2费-托合成催化剂性质及反应性能的影响[J].石油学报(石油加工),2012,28(2):236-241. |
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| 作者姓名： | 高海燕 相宏伟 李永旺 |
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| 作者单位： | 1. 江南大学食品胶体与生物技术教育部重点实验室化学与材料工程学院,江苏无锡214122;中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001
2. 中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原,030001 |
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| 基金项目： | 国家自然科学基金重大项目，中央高校基本科研业务费专项资金项目 |
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| 摘 要： | 考察了钾（K）助剂 (质量分数0.17%～4.98%) 对Co/SiO2 催化剂结构及其费-托合成（F-T）反应性能的影响。结果表明， K助剂趋向于存在催化剂的外表面，K助剂的添加显著降低了催化剂的比表面积。 在H2气氛下对催化剂还原处理，添加K助剂不会降低催化剂的还原能力，反而会促进Co3O4的还原。在CO+H2气氛中，K助剂会促进金属Co的氧化，使催化剂活性降低。少量的K助剂使催化剂的催化活性有所下降，但使产物中的C1~C4含量降低，烯/烷比增加。
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| 关 键 词： | 钴催化剂 二氧化硅 K助剂 费-托合成 |
Effects of Potassium Promoter on Properties of Co/SiO2 Catalyst and Its Performance for Fischer-Tropsch Synthesis |
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| GAO Haiyan
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XIANG Hongwei
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LI Yongwang.Effects of Potassium Promoter on Properties of Co/SiO2 Catalyst and Its Performance for Fischer-Tropsch Synthesis[J].Acta Petrolei Sinica (Petroleum Processing Section),2012,28(2):236-241. |
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| Authors: | GAO Haiyan XIANG Hongwei LI Yongwang |
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| Affiliation: | 1.The Key Laboratory of Food and Biotechnology,Ministry of Education, School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China; 2.State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China) |
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| Abstract: | The effects of potassium(K) promoter(mass fraction 0.17%-4.48%) on the properties of Co/SiO2 catalyst and its performance for Fischer-Tropsch synthesis were studied.The results showed that K promoter which tended to lie on the outside surface of the Co-K/SiO2 catalyst had a poor intersolubility with Co species.The specific surface area of the Co-K/SiO2 catalyst decreased significantly as the addition of K promoter,which could not reduce the reduction ability of the Co-K/SiO2 catalyst but promoted the reduction of Co3O4 under the H2 atmosphere.The Co-K/SiO2 catalyst activity decreased as the oxidation of metal Co was promoted by the K promoter.By adding small amount of K promoter,the Co-K/SiO2 catalyst activity dropped but the amount of Cl-C4 hydrocarbons in products of Fischer-Tropsch synthesis decreased and the ratio of alkenes to alkyl increased. |
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| Keywords: | cobalt catalyst silica K promoter Fischer-Tropsch synthesis |
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