| H3PW12O40/Al2O3在制备农药中间体丙烯醛反应中的性能评价研究 |
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| 引用本文： | 张跃,丁海亮,刘建武,严生虎,沈介发.H3PW12O40/Al2O3在制备农药中间体丙烯醛反应中的性能评价研究[J].安徽农业科学,2010,38(7):3539-3541. |
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| 作者姓名： | 张跃 丁海亮 刘建武 严生虎 沈介发 |
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| 作者单位： | 江苏工业学院精细化工研究所,江苏常州,213164 |
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| 摘 要： | 目的]研究H3PW12O40/Al2O3在制备农药中间体丙烯醛反应中的性能。方法]采用等体积浸渍法制备了H3PW12O40/Al2O3催化剂,在常压连续流动固定床反应器中,对催化剂的活性稳定性进行了考察,同时利用BET、SEM和XRD等对反应前后的催化剂进行了基本表征。结果]在反应过程中,催化剂上的积碳量呈上升趋势,尤其在催化剂活性增长期其积碳生成速率很快。较高的空速有利于减少催化剂上的积碳量。结论]积碳可能是由丙烯醛在杂多酸催化剂上的聚合而产生的,它覆盖在催化剂表面,堵塞了孔道,从而引起了催化剂活性的降低。但积碳并没有破坏催化剂的结构,催化剂仍然保持Keggin结构,仍具有催化活性。
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| 关 键 词： | 甘油脱水 负载磷钨酸 丙烯醛 积碳 |
Study on Property Evaluation of H_3PW_(12)O_(40)/Al_2O_3 in the Process of Preparing Pesticide Intermediate Acrolein |
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| ZHANG Yue et al.Study on Property Evaluation of H_3PW_(12)O_(40)/Al_2O_3 in the Process of Preparing Pesticide Intermediate Acrolein[J].Journal of Anhui Agricultural Sciences,2010,38(7):3539-3541. |
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| Authors: | ZHANG Yue |
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| Institution: | Institute of Fine Chemical Engineering;Jiangsu Polytechnic University;Changzhou;Jiangsu 213164 |
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| Abstract: | Objective] The aim was to investigate the property of H3PW12O40/Al2O3 in the process of preparing pesticide intermediate acrolein.Method] The H3PW12O40/Al2O3 heteropoly acid catalyst was prepared by volume impregnation method with Al2O3 as carrier.The catalyst stability for glycerol producing acrolein was studied in a continuous fixed-bed reactor.The fresh and coked catalysts were characterized by BET,SEM,XRD.Result] The amount of the coke deposition was slowly increased during the reaction process,and r... |
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| Keywords: | Glycerol dehydration Supported phosphotungstic acid Acrolein Coke deposition |
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