| 摘要: |
| 以碱液处理过的β沸石为载体,四水合钼酸铵((NH4)6Mo7O24.4H2O)为钼源,采用程序升温法,以正己烷为碳源制备了β-Mo2C/改性β沸石催化剂。对样品使用XRD、BET、FTIR、TEM等分析表征手段,结果表明,改性后的β沸石具有较高比表面积和较大孔径。以正己烷为模型反应物,在连续进料式固定床微型反应器上考察了催化剂的异构化性能。催化结果显示,经过碱液处理的β沸石催化剂的异构化转化率、异构选择性和异构得率均高于未经处理的β沸石催化剂。β-Mo2C/改性β沸石催化剂的寿命要比β-Mo2C/β沸石催化剂的寿命提高了近1倍以上,且最适宜反应温度降低了10℃。 |
| 关键词: 临氢异构 改性 β沸石 合成 碳化钼 正己烷 |
| DOI： |
| 分类号:O643.32 |
| 基金项目:辽宁省教育厅科技项目(05L221) |
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| Improvement Prepare for the Beta Zeolite and its Catalytic Activity on Hydroisomerization of n-Hexane |
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Chang Yong1,2,3, Wang Haiyan2, Li Shengke2
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1.College of Chemistry and Chemical Engineering,China University of Petroleum,Dongying 257061,China;2.College of Petroleum and Chemical Engineering,Liaoning University of Petroleum and Chemical Engineering,Fushun 113001,China;3.College of Petroleum and Chemical Engineering ,Shenyang University of Technology,Liaoyang 111003,China
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| Abstract: |
| Molybdenum carbide catalysts were prepared by temperature-programmed reaction using β-zeolite as carrier which was treated by alkaline solution,using (NH4)6Mo7O24·4H2O as molybdenum source and n-hexane as carbon source.The characterization results of XRD,BET,FT-IR,TEM showed that the modified β-zeolite possessed high specific surface area and large pore volume.The catalytic performance for hydroisomerization over β-Mo2C/modified β-zeolite has been investigated in a fixed-bed down-flow reactor,using n-hexane as the module reactant.The result of the reaction shows that the modified β-zeolite catalyst has higher hydroisomerization conversion rate,selectivity and yield than the β-zeolite powder.Moreover,the life of the β-Mo2C/modified β-zeolite catalyst increased nearly doubled,and the most suitable reaction temperature of the β-Mo2C/modified β-zeolite catalyst reduced 10℃. |
| Key words: hydroisomerization modify β-zeolite synthesis molybdenum carbide n-hexane |
