Page 291 - Principles of Catalyst Development
P. 291
282 INDEX
Deactivation (cont.) Drying (cont.)
by fouling, 192 of hydrogels, 102
by heavy metals, 192 temperature effects in. 103
kinetics of, 188 Dual functional activity, 34, 36. 76
by metal contamination, 218 Dual oxygenolysis, 239, 255
by poisoning, 200
process, 187 Effectiveness factor, 14, 19
role of, 5 Electron diffraction, 138
by sintering, 194 Electronic theory, 16, 53
Dearomatization, 238 of metals, 16, 53
Dehydration, 238 of semiconductors, 68
by solid acids, 27, 75 Electron microscopy, 157
Dehydrogenation, 238 Electron probe analysis. 137
coking, 214 Energy conservation, in catalyst manufactur-
by metals, 214 ing, 126
pattern for oxides, 90 Enzyme catalysts, 8
Demetallization, 239 Equipment, in catalyst manufacturing, 125
Denitrogenation, on sulfides, 28 Ethane hydrogenation, effect of the support,
Densities, 141 34
Design equation, 176 Extended x-ray absorption fine structure
Desulfurization, 239 (EXAFS), 160
Diagnostic tests, 21 Extrudates
Differential thermal analysis (DTA), 140 manufacture of, 128
Diffusion pressure drop with, 10
bulk, 13
during adsorption. 113 Faujasite
effects in catalysis. 7 acidity of, 168
external, II H 2S poisoning of, 209
index of. 20 ion exchange in, 79, 115
interaction with chemical rates, 20 preparation of, 108
Knudsen, 13 structure of, 77
measurement of, 155 Fe molybdate, for methane oxidation, 91
surface. 16 Fe~04' for methane oxidation, 91
tests for, 21 Fermi level
of xylenes in ZSM-5, 81 of metals, 54
Dinuclear aromatics, 239 of semiconductors, 64
Dismutation. 239 Filtration, of hydrogels, 102
Dispersion Fischer-Tropsch
from chemisorption, 164 reactions, 239
definition of, 28 recipe for catalyst, 261
measurement of, 162 Fixed carbon, 239
from poison titration, 166 Flakes, manufacture of, 130
from reaction titration, 166 Fluidized beds, 189
Di;proportionation, 239. 252 Huorescent indicators, 168
Dissociative coking. 210, 220 Formylation. 239
Distillation, 238 Fouling
Doctor test, 239 cause of. 192
Drying effect of, 192
commercial units for, 103 Free carbon, 239
concentration profiles and, 116
after deposition, III Gas hourly space velocity (GHSY), 239
