|
|
|
|
| LEADER |
00000nam a22000003u 4500 |
| 001 |
b5976386 |
| 003 |
CoU |
| 005 |
20080207000000.0 |
| 006 |
m d f |
| 007 |
cr un |
| 008 |
100524e19900101wvu st f0|||||eng|d |
| 035 |
|
|
|a (TOE)ost6355791
|
| 035 |
|
|
|a (TOE)6355791
|
| 040 |
|
|
|a TOE
|c TOE
|
| 049 |
|
|
|a GDWR
|
| 072 |
|
7 |
|a 01
|2 edbsc
|
| 086 |
0 |
|
|a E 1.99:doe/pc/89771-4
|
| 086 |
0 |
|
|a E 1.99:doe/pc/89771-4
|
| 245 |
0 |
0 |
|a Mechanism of hydrodenitrogenation (Part 4) infrared spectroscopy of acidic molybdena catalysts
|h [electronic resource]
|
| 260 |
|
|
|a Morgantown, W.Va. :
|b National Energy Technology Laboratory (U.S.) ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
|c 1990.
|
| 300 |
|
|
|a Pages: (14 p) :
|b digital, PDF file.
|
| 336 |
|
|
|a text
|b txt
|2 rdacontent.
|
| 337 |
|
|
|a computer
|b c
|2 rdamedia.
|
| 338 |
|
|
|a online resource
|b cr
|2 rdacarrier.
|
| 500 |
|
|
|a Published through the Information Bridge: DOE Scientific and Technical Information.
|
| 500 |
|
|
|a 01/01/1990.
|
| 500 |
|
|
|a "doe/pc/89771-4"
|
| 500 |
|
|
|a "DE91002496"
|
| 500 |
|
|
|a Miranda, R.
|
| 500 |
|
|
|a DOE/FE.
|
| 520 |
3 |
|
|a Mo oxide catalysts supported over a complete series of silica-aluminas have been characterized in the oxidic and reduced states, by means of total acidity measurements and by infrared spectroscopy. Ammonia chemisorption was used to titrate the total acidity of the catalysts, and IR absorption of adsorbed pyridine to distinguish Bronsted from Lewis acid sites. The formation of new acidity upon deposition of molybdena on silica-alumina supports was then explained on the basis of a simple surface model. The new acidity is of both Lewis and Bronsted type, the preponderance of one over the other depending on support composition, as well as loading and state of oxidation of Mo. High-alumina supports and low Mo loading favor dispersed Mo species, in particular bidentate and monodentate di-oxo Mo species. The latter is responsible for the new Bronsted acidity. Coordinative unsaturation of polymolybdates is responsible for the new Lewis acidity, which is increased upon reduction of Mo. High-silica supports favor monodentate species (high Bronsted acidity) up to 4 wt % MoO₃. Beyond that, polymolybdates species and Lewis acidity predominate. 7 refs., 4 figs.
|
| 536 |
|
|
|b FG22-89PC89771.
|
| 650 |
|
7 |
|a Catalysts.
|2 local.
|
| 650 |
|
7 |
|a Denitrification.
|2 local.
|
| 650 |
|
7 |
|a Broensted Acids.
|2 local.
|
| 650 |
|
7 |
|a Silica.
|2 local.
|
| 650 |
|
7 |
|a Chemisorption.
|2 local.
|
| 650 |
|
7 |
|a Organic Compounds.
|2 local.
|
| 650 |
|
7 |
|a Silicon Oxides.
|2 local.
|
| 650 |
|
7 |
|a Document Types.
|2 local.
|
| 650 |
|
7 |
|a Infrared Spectra.
|2 local.
|
| 650 |
|
7 |
|a Separation Processes.
|2 local.
|
| 650 |
|
7 |
|a Oxide Minerals.
|2 local.
|
| 650 |
|
7 |
|a Transition Element Compounds.
|2 local.
|
| 650 |
|
7 |
|a Ammonia.
|2 local.
|
| 650 |
|
7 |
|a Catalytic Effects.
|2 local.
|
| 650 |
|
7 |
|a Oxygen Compounds.
|2 local.
|
| 650 |
|
7 |
|a Nitrogen Hydrides.
|2 local.
|
| 650 |
|
7 |
|a Spectra.
|2 local.
|
| 650 |
|
7 |
|a Fuels.
|2 local.
|
| 650 |
|
7 |
|a Hydrides.
|2 local.
|
| 650 |
|
7 |
|a Minerals.
|2 local.
|
| 650 |
|
7 |
|a Sorption.
|2 local.
|
| 650 |
|
7 |
|a Surface Properties.
|2 local.
|
| 650 |
|
7 |
|a Chemical Properties.
|2 local.
|
| 650 |
|
7 |
|a Progress Report.
|2 local.
|
| 650 |
|
7 |
|a Organic Nitrogen Compounds.
|2 local.
|
| 650 |
|
7 |
|a Heterocyclic Compounds.
|2 local.
|
| 650 |
|
7 |
|a Inorganic Acids.
|2 local.
|
| 650 |
|
7 |
|a Lewis Acids.
|2 local.
|
| 650 |
|
7 |
|a Azines.
|2 local.
|
| 650 |
|
7 |
|a Pyridines.
|2 local.
|
| 650 |
|
7 |
|a Molybdenum Oxides.
|2 local.
|
| 650 |
|
7 |
|a Aluminium Compounds.
|2 local.
|
| 650 |
|
7 |
|a Molybdenum Compounds.
|2 local.
|
| 650 |
|
7 |
|a Silicon Compounds.
|2 local.
|
| 650 |
|
7 |
|a Hydrogenation.
|2 local.
|
| 650 |
|
7 |
|a Refractory Metal Compounds.
|2 local.
|
| 650 |
|
7 |
|a Aromatics.
|2 local.
|
| 650 |
|
7 |
|a Liquid Fuels.
|2 local.
|
| 650 |
|
7 |
|a Chemical Reactions.
|2 local.
|
| 650 |
|
7 |
|a Nitrogen Compounds.
|2 local.
|
| 650 |
|
7 |
|a Pyridine.
|2 local.
|
| 650 |
|
7 |
|a Oxides.
|2 local.
|
| 650 |
|
7 |
|a Aluminium Oxides.
|2 local.
|
| 650 |
|
7 |
|a Evaluation.
|2 local.
|
| 650 |
|
7 |
|a Hydrogen Compounds.
|2 local.
|
| 650 |
|
7 |
|a Chalcogenides.
|2 local.
|
| 650 |
|
7 |
|a Coal, Lignite, And Peat.
|2 edbsc.
|
| 710 |
2 |
|
|a University of Louisville.
|4 res.
|
| 710 |
2 |
|
|a National Energy Technology Laboratory (U.S.).
|4 res.
|
| 710 |
1 |
|
|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
|
| 856 |
4 |
0 |
|u http://www.osti.gov/servlets/purl/6355791-I11Qia/
|z Online Access
|
| 907 |
|
|
|a .b59763863
|b 03-06-23
|c 05-26-10
|
| 998 |
|
|
|a web
|b 05-26-10
|c f
|d m
|e p
|f eng
|g wvu
|h 0
|i 1
|
| 956 |
|
|
|a Information bridge
|
| 999 |
f |
f |
|i 3fb388fd-a77d-5c1a-b704-aa4b79abce68
|s c5e423ff-ec89-5b30-8309-811273edbdd5
|
| 952 |
f |
f |
|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:doe/pc/89771-4
|h Superintendent of Documents classification
|i web
|n 1
|
