笑氣催化分解成氮?dú)夂脱鯕馐菧p少化學(xué)工程過(guò)程中氮氧化物排放有效的技術(shù)。同時(shí),近些年來(lái)這種技術(shù)越來(lái)越受關(guān)注。為了控制化工過(guò)程笑氣排放,本論文研究了離子交換分子篩、負(fù)載體系和單一的或者復(fù)合的氧化物這幾種類型的催化劑。第一部分:制備一系列用于笑氣直接分解的浸漬在蜂窩狀堇青石上M(Fe,Co)-BEA催化劑。離子交換方法制備M(Fe,Co)-BEA(M=1wt%)分子篩,之后用5 wt%和10 wt%硅溶膠或者是鋁溶膠作為粘合劑將分子篩浸漬在堇青石載體上。制備的整體式樣品的形貌通過(guò)掃描電子顯微鏡分析,結(jié)果顯示相對(duì)低的含量(5 wt%)M(Fe,Co)-BEA分子篩粉末在用硅溶膠或鋁溶膠做粘合劑比較好地浸漬在堇青石上。笑氣分解活性評(píng)價(jià)實(shí)驗(yàn)結(jié)果有(I)鋁溶膠能明顯促進(jìn)Fe-BEA整體式樣品催化分解笑氣,然而硅溶膠能提高Co-BEA整體式樣品催化分解笑氣的活性;(Ⅱ)低含量的粘合劑(5 wt%)比高含量的粘合劑(10 wt%)更有利于制備整體式催化劑。利用計(jì)算流體動(dòng)力學(xué)(CFD)模擬笑氣在M(Fe,Co)-BEA整體式催化劑分解,研究了流體動(dòng)力學(xué)的質(zhì)量分布和壓力降。第二部分:研究了一系列混合金屬氧化物...

【文章頁(yè)數(shù)】：134 頁(yè)

【學(xué)位級(jí)別】：博士

【文章目錄】：
摘要
Abstract
Abbreviations
Nomenclature
Chapter Ⅰ Literature
    1.1 Introduction and Motivation
    1.2 The main sources of nitrous oxide emissions
        1.2.1 Human sources of nitrous oxide emission
        1.2.2 Natural sources of nitrous oxide emissions
    1.3 Present status of CDM projects to reduce N₂O emissions
    1.4 Mechanism of catalytic N₂O decomposition
    1.5 Remediation technologies for N₂O abatement
    1.6 Diffrent types of catalysts for N₂O decomposition
        1.6.1 Metal oxides
        1.6.2 Supported metals
        1.6.3 Transition metal ions exchanged zeolites for direct N₂O decomposition
Chapter Ⅱ M(Fe, Co)-BEA washcoated honeycomb cordierite for N₂O directdecomposition
    2.1 Introduction
    2.2 Experimental and computational methods
        2.2.1 Experimental method
        2.2.2 Computational method
    2.3 Results and discussion
        2.3.1 Characterization of the M(Fe, Co)-BEA powder catalyst
        2.3.2 Characterization of the M(Fe, Co)-BEA monolith catalyst
        2.3.3 Activity measurement
        2.3.4 CFD simulations of M(Fe, Co)-BEA monolith for N20 direct decomposition
    2.4 Conclusion
Chapter Ⅲ Preparation of NiCe mixed oxidesfordirectN₂O decomposition in theabsence of oxygen
    3.1 Introduction
    3.2 Experimental section
        3.2.1 Catalysts preparation
        3.2.2 Catalysts Characterization
        3.2.3 Activity tests
    3.3 Results and discussion
        3.3.1 Characterization of the mixed oxide catalyst
        3.3.2 Activity measurement
    3.4 Conclusion
Chapter Ⅳ NiM(Rh, Ce) mixed oxides for direct N20 decomposition in the absenceof oxygen
    4.1 Introduction
    4.2 Experimental section
        4.2.1 Catalysts preparation
        4.2.2 Catalysts Characterization
        4.2.3 Activity tests
    4.3 Results and discussion
        4.3.1 Characterization of the mixed oxide catalyst
        4.3.2 Activity measurement
    4.4 Conclusion
Chapter Ⅴ Summary
References
Liste of publications
Acknowledgements
作者和導(dǎo)師簡(jiǎn)介
附件



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