| P/HZSM-5分子筛催化乙醇脱水制备乙烯 |
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| 引用本文： | 胡耀池,詹妮娜,章文贵,吕浩,胡燚.P/HZSM-5分子筛催化乙醇脱水制备乙烯[J].南京工业大学学报(自然科学版),2012,34(1):24-29. |
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| 作者姓名： | 胡耀池 詹妮娜 章文贵 吕浩 胡燚 |
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| 作者单位： | 南京工业大学材料化学工程国家重点实验室,江苏南京,210009 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目，中国石油化工集团公司技术开发项目，江苏省基础研究计划(自然科学基金)-企业博士创新项目 |
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| 摘 要： | 采用浸渍法制备一系列P/HZSM-5分子筛催化剂,考察P含量对乙醇脱水制备乙烯的影响,并以X线衍射（XRD）、N2吸附脱附（BET）、27AL核磁共振(27AL MAS NMR)等表征手段研究了P物种对HZSM-5分子筛结构和酸性质的影响。结果表明:H3PO4的添加会在某种程度上促进骨架四面体Al原子的脱离,从而有效地降低催化剂酸强度,进而减弱了催化剂的活性,但有利于延长使用寿命。结合NH3-TPD表征结果,P的添加量控制在2.0%比较合适。
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| 关 键 词： | 乙醇 脱水 乙烯 HZSM-5 磷酸 |
Catalytic dehydration of ethanol to ethylene over P/HZSM-5 zeolites |
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| HU Yaochi
,
ZHAN Nina
,
ZHANG Wengui
,
Lü Hao
,
HU Yi.Catalytic dehydration of ethanol to ethylene over P/HZSM-5 zeolites[J].Journal of Nanjing University of Technology,2012,34(1):24-29. |
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| Authors: | HU Yaochi ZHAN Nina ZHANG Wengui Lü Hao HU Yi |
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| Institution: | HU Yaochi,ZHAN Nina,ZHANG Wengui,L(U|¨) Hao,HU Yi (State Key Laboratory of Matcrials-Oriented Chemical Engineering,Nanjing University of Technology,Nanjing 210009,China) |
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| Abstract: | A series of P/HZSM-5 zeolite catalysts were prepared by impregnation method and used in the dehydration of ethanol to ethylene.X-ray diffraction（XRD）,N2 adsorption for specific surface area（BET）, temperature programmed desorption of ammonia（NH3-TPD）,and Al nuclear magnetic resonance(27Al MAS NMR) were used to obtain the information about structure and acid properties of HZSM-5 zeolites and the effect of P content on the catalytic performance.The results indicated that the addition of phosphoric acid promoted the dealumination from framework with some extent,reduced the acid strength of catalyst, and weakened the activity of the catalyst that was beneficial to the extension of its service life.Combined with the results of NH3-TPD,it was concluded that P content of 2.0%was suitable. |
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| Keywords: | ethanol dehydration ethylene HZSM-5 phosphoric acid |
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