THE ROLE OF DIFFUSION IN CATALYSISPDF电子书下载

查看更多关于的内容

1．DIFFUSION 1

1-1．Introduction 1

1-2．Diffusion in Gases 2

1-3．Diffusion Coefficients:Binary Gas Mixtures 5

1-4．Diffusion in Liquids 10

1-5．Diffusion in Pores 12

Bulk diffusion 15

Knudsen diffusion 16

The transition region 17

Bimodal pore size distributions 18

Surface diffusion 19

1-6．Estimation of Diffusion Coefficients in Porous Solids 20

2．MASS TRANSFER TO CATALYST PARTICLES 29

2-1．Introduction 29

Space velocity 30

2-2．Fixed Beds 31

Mass transfer 31

Heat transfer 32

2-3．Reactor Performance with Mass Transfer Controlling 35

Temperature difference 36

2-4．Trickle Beds 39

2-5．Fluidized Beds 40

Mass transfer 41

Heat transfer 43

2-6．Solid Catalysts Suspended in Liquids(Slurries) 43

Mass transfer in slurry reactors 44

Mass transfer to suspended particles 47

2-7．Hydrogenation Capacity of Slurries 52

3．DIFFUSION AND REACTION IN POROUS CATALYSTS 56

3-1．Introduction 56

3-2．Geometries Other Than a Sphere 62

3-3．Determination of Effectiveness Factor,η 65

3-4．Complex Kinetic Expressions 76

3-5．Change in Volume on Reaction 78

3-6．The Effective Diffusivity 80

3-7．Temperature Gradients 83

3-8．Criteria for Insignificant Diffusion Effects 91

3-9．Catalyst Poisoning 93

3-10．Selectivity in Porous Catalysts 96

3-11．Diffusion Effects on Reaction Intermediates 101

3-12．Regeneration of Coked Catalysts 102

3-13．Effectiyeness Factors in Ion Exchange Resins 104

List of Symbols 107

References 111

Index 117

查看更多关于的内容