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Na2CO3对非水体系合成的丝光沸石的酸性和催化性能的影响

INFLUENCE OF Na2CO3 ON PROPERTIES OF MORDENITE SYNTHESIZED IN NONAQUEOUS SYSTEM

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【作者】 李建权刘光焕徐红徐文旸

【Author】 Li Jianquan Liu Guanghuan Xu Hong Xu Wenyang(Research Institute of Special Chemicals,Taiyuan University of Technology,Taiyuan)

【机构】 太原工业大学精细化工研究所太原工业大学精细化工研究所 太原太原太原

【摘要】 <正> 最近有关非水体系合成沸石的文献报道不断增多,但关于该体系合成的沸石催化性能的报道还很少。我们曾报道了非水体系合成的丝光沸石(简称非水丝光沸石,NAM)的二甲苯异

【Abstract】 The influence of Na2CO3 on the catalytic properties of mordenite synthesized in nonaqueous system was examined with NH3-TPD and xylene isomerization in a pulsed micro-reactor.With the increase of calcination temperature,the activity for xylene isomerization increases.The thermal stability of HNAM(H-nonaqueous mordenite)increases when Na2CO3 is added in the synthesis.The crystallinity of NAM(Na2CO3)increases with the increase of the molar ratio of Na2CO3/AlO3.On the other hand,the ratio of I25.7°/I9.7°(ratio of diffraction intensities at 2θ=25.7°and 9.7°)decreases with the increase of Na2CO3/Al2O3.The number of acid sites and the activity of HNAM(Na2CO3)pass through maxima when the ratio of I25.7°/I9.7°increases.These experiments show that HNAM(Na2CO3)is a good catalyst for xylene isomerization and Na2CO3 has an important effect on the properties and structure of HNAM.

【关键词】 丝光沸石酸性异构化非水合成Na2CO3
【Key words】 mordeniteacidityisomerizationnonaqueous synthesisNa2CO3
  • 【文献出处】 燃料化学学报 ,Journal of Fuel Chemistry and Technology , 编辑部邮箱 ,1991年03期
  • 【被引频次】3
  • 【下载频次】28
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