| 水对两段法合成汽油中HZSM-5分子筛稳定性及油相产物的影响 |
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| 引用本文： | 李剑,谭猗生,杨彩虹,韩怡卓.水对两段法合成汽油中HZSM-5分子筛稳定性及油相产物的影响[J].燃料化学学报,2010,38(1):96-101. |
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| 作者姓名： | 李剑 谭猗生 杨彩虹 韩怡卓 |
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| 作者单位： | 1.State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan030001, China;
2.Graduate University of Chinese Academy of Sciences, Beijing100049, China |
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| 基金项目： | 中国科学院知识创新工程重要方向项目，中国科学院海外基金，太原市科技局明星项目 |
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| 摘 要： | 模拟两段法合成汽油工艺的反应条件(360℃、2 MPa),通过控制甲醇的脱水量或在该气氛下对HZSM-5进行水热预处理,考察了水对催化剂稳定性及油相产物的影响。XRD、BET、FT-IR、SEM和NH3-TPD等表征手段表明水热预处理后的分子筛具有晶粒小、中孔多和酸强度低等特点,能显著提高汽油收率和异构烷烃选择性。甲醇在HZSM-5分子筛上发生脱水反应,产生的水热气氛造成强酸中心失活。
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| 关 键 词： | 水 HZSM-5分子筛 两段法合成汽油 异构烷烃 |
| 收稿时间： | 2009-04-19 |
| 修稿时间： | 2009-09-06 |
Effect of water on stability of HZSM-5 and product distribution in two-stage gasoline synthesis from syngas |
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| LI Jian,TAN Yi-sheng,YANG Cai-hong,HAN Yi-zhuo.Effect of water on stability of HZSM-5 and product distribution in two-stage gasoline synthesis from syngas[J].Journal of Fuel Chemistry and Technology,2010,38(1):96-101. |
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| Authors: | LI Jian TAN Yi-sheng YANG Cai-hong HAN Yi-zhuo |
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| Institution: | LI Jian1,2,TAN Yi-sheng1,YANG Cai-hong1,HAN Yi-zhuo1(1.State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China 2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | The effects of water on the stability of the catalyst and the product distribution were investigated through controlling the amount of water dehydrated from methanol or using HZSM-5 pretreated by hydrothermal method at the analogous atmosphere of gasoline synthesis in two-stage process(360 ℃, 2 Mpa). Physicochemical properties of the zeolite were characterized by XRD, BET, FT-IR, SEM, and NH_3-TPD. The results showed that HZSM-5 pretreated by hydrothermal method had smaller crystal size, more mesoporous, and moderate acid sites, which in all result in the enhancement of gasoline yield and the selectivity to iso-paraffins. The steam generated during methanol dehydration led to the deactivation of strong acid over HZSM-5 zeolite. |
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| Keywords: | water HZSM-5 two-stage gasoline synthesis iso-paraffins |
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