| 硫化促进剂在5A分子筛上的动态行为研究 |
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| 引用本文： | 段雪,饶国瑛,朱娅玲,欧阳序辉.硫化促进剂在5A分子筛上的动态行为研究[J].北京化工大学学报(自然科学版),1993(1). |
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| 作者姓名： | 段雪 饶国瑛 朱娅玲 欧阳序辉 |
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| 作者单位： | 北京化工学院应用化学系
(段雪，饶国瑛，朱娅玲)，北京化工学院应用化学系(欧阳序辉) |
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| 摘 要： | 文中以程序升温脱附(TPD)和原位红外-程序升温脱附(IR-TPD)为主要实验手段,对5A分子筛的表面酸性特征及硫化促进剂在5A分子筛上的动态行为进行研究。结果表明:5A分子筛表面对胺类化合物表现出吸附能量高低不等的B酸、混合B酸和L酸、L酸及弱化学吸附位。对于吸附型缓释交联剂而言。有效的表面吸附部位为弱化学吸附位,且带有氢键吸附的特征。动力学计算结果表明:对于有效部位而言,不同的硫化促进剂由5A分子筛内孔表面脱出时,其动力学特征不同,但均与晶内扩散有关,其表观脱附活化能分别为75.4kJ/mol(二乙胺),63.6kJ/mol(环己胺)和69.9kJ/mol(乙二胺)。
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| 关 键 词： | 吸附 脱附 动力学 分子筛 硫化促进剂 |
Study on the Dynamic Behavior of Accelerating Cross-linkage of Vulcanization on 5A Zeolites |
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| Duan Xue Rao Guoying Zhu Yaling OuyangXuhui.Study on the Dynamic Behavior of Accelerating Cross-linkage of Vulcanization on 5A Zeolites[J].Journal of Beijing University of Chemical Technology,1993(1). |
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| Authors: | Duan Xue Rao Guoying Zhu Yaling OuyangXuhui |
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| Institution: | Department of Applied Chemistry |
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| Abstract: | In this paper, the acidic character on surface of 5A zeolites and the dynamic beharior of accelerating cross-linkage agents of vulcanization on the zeolites were studied by TPD and IR-TPD. The results obtained show that there are different acidic sites on 5A zeolites, suchas B acidic, mixing B and L acidic, L acidic and weak chemical adsorption sites for base adsorbates. The effective sites on surface for adsorption are the sites of weak chemical adsorption for the cross-linkage agents of slow release from zeolites. It shows that different accelerating cross-linkage agents of vulcanization have different kinetic charactre istics in the desorption from the suface of 5A zeolites and the diffusion in crystal is involved. |
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| Keywords: | adsorption desorption kinetics molecular sieves vulcanization accelerating zcolites |
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