过渡金属氧化物在ZSM-5中分布形态研究
关键词 Fe-ZSM-5 分布形态 XRD IR TPR TPD
毕业设计说明书（论文）外文摘要
Title The investigation of transition metal oxides in the distribution patterns of the Fe-ZSM-5 zeolite catalyst
Abstract
This project were synthesized by hydrothermal method load of transition metal oxides of Fe-ZSM-5 zeolite catalysts, zeolite catalysts to change the load element Fe mass fraction of synthesis of different states. Carried out by XRD, IR, TPR and TPD analysis and preparation of the catalyst, the catalysts were characterized by the following conclusions: (1) XRD showed that the synthesized Fe-ZSM-5 catalyst crystal was monoclinic and MFI peaks, that the experiments have been successfully synthesized Fe-ZSM-5 catalyst can also be obtained Fe into the hole in the ZSM-5 zeolite skeleton conclusion. (2) IR and TPD shows that the Fe-ZSM-5 zeolite has two types of acidic centers, one is the desorption of the weak acid in about 248 ℃, and the other is a strong acid sites after desorption of 400 ℃, but the acid desorption peak is not obvious, and with iron increased the amount of zeolite acid sites to the low-temperature offset. (3) TPR, research found that Fe2O3 to Fe3O4, the reduction peak at about 385 ℃, Fe3O4 to Fe0 reduction peak at about 580 ℃, with the agreement in the literature.
Keywords Fe-ZSM-5 distribution patterns XRD IR TPR TPD
目 录
1 绪论 2
1.1处理NOX尾气的方法 2
1.2 分子筛催化剂Fe-ZSM-5的提出 2
2. 分子筛催化剂Fe-ZSM-5 2
2.1 分子筛催化剂Fe-ZSM-5的合成方法 2
2.2 分子筛催化剂ZSM-5的结构 2
2.3本论文研究的内容 2
3 实验 2
3.1实验仪器与药品 2
3.1.1实验药品 2
3.1.2实验仪器 2
3.2实验过程 2
3.2.1 Fe-ZSM-5的制备 2
3.2.2 Fe-ZSM-5的表征 2
4实验结果与讨论 2
4.1 XRD分析 2
4.2 红外光谱分析 2
4.3 H2- TPR分析 2
4.4 NH3-TPD分析 2
结 论 2
参 考 文 献 2
1 绪论
近三十年来，随着现代工业的发展，大气污染己经成为一个日益严重的全球性问题。汽车、飞机、内燃机及煤、石油、天然气等石化燃料的燃烧过程中排放出大量的氮氧化物(NOX)是大气的主要污染物。据80年代初估计，全世界每年由于人类活动向大气排放的NOX约5300万吨，并且还在持续增长[1]。氮氧形成的化合物包括多种,如NO,N02,N20,N203,N20,其中主要以NO和NO2形式存在,简称NOX。NOX对环境的损害作用极大，它既是形成酸雨的主要物质之一，也是形成大气中光化学烟雾的重要物质和消耗臭氧的一个重要因子[2,3]。此外，NO还可与血液中的血红蛋白结合成亚硝基血红蛋白或亚硝基高铁血红蛋白，使血液输氧能力下降，危害人体健康。因此，如何有效地控制NOX的排放成为大气污染治理的热点。
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