Contents:
N-compound is nitrogen compound, which is carbazole or acridine in the present work and H.
The fields of hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) catalysis, for understanding the complex reaction mechanisms involved in this. Hydrodesulfurization and Hydrodenitrogenation. 2. Organometallic Modeling of the Hydrodesulfurization and Hydrodenitrogenation Reactions Coke has also been removed from catalysts by contact with hydrogen at elevated temperature.
C is a hydrocarbon. Nitrogen compounds competitive with sulfur compound on the surface of catalyst, by substitution the fractional occupation of the DBT:. Neglect the self inhibition for DBT because the constant concentration for DBT therefore no self inhibition which meaning:.
Inhibition effect represents by finding the n which is the fitting exponent for the inhibition effect of nitrogen compound. The adsorption constant is an indicator of force to adsorption on the surface of catalyst with competitive of sulfur compound. When the adsorption constant is high that means, this nitrogen compound is high competitive with sulfur compound and have high adsorption on the surface of catalyst.
Reaction rate constant for inhibition: Reaction rate constant for inhibition can calculate from previous equation:. Figure 2 shows a good distribution of active metals PtMo which represent small particle size while the alumina support represent large particle or surface contain small particle.
This figure indicates that calcination temperature does not change the crystalline structure of the catalyst. Figure 4 and Table 1 show the textural surface of homemade PtMo catalyst. The homemade catalyst has high surface area, so it has high macroporous particles and a low mesoporous particle, which means more voids between particles therefore an increase in pore volume of catalyst.
Figure 5 shows the result of TPD for homemade PtMo, it is shown that there are no full peaks, so basic centers on the catalyst are little. Weak basic site on the hydrotreating catalyst is a very important point because these catalysts are acidic catalysts, for typical hydrotreating catalyst there are two functions, acidic support for cracking heteroatom bonds and metals for hydrogenation [ 7 , 8 ].
So the strength of hydrotreating base to acidity result show that the strength of basic very weak and strength of acidic very high, therefore these result are very excellent.
Chemical 96 3 , , The sequence constitution and Bonding publishes serious experiences on themes of analysis fascinated by chemical constitution and bonding. Figures show the inhibition factor for carbazole and acridine over PtMo catalyst. Kluwer Academic Publishers, c Opening, hydrogenation, and hydrodesulfurization of dibenzothiophene DBT at iridium.
Inhibition effect can be represented by exponent factor n which is a power of inhibition effect for nitrogen compound. For the present study n is found by fitting the nitrogen compound data, the procedure is shown in the Figures The adsorption constant for carbazole and acridine can be calculated by equation The adsorption constant for carbazole is The adsorption constant for acridine is At large value of adsorption constant nitrogen compound is highly competitive with sulfur compound and highly adsorbed on the catalyst, also when the adsorption constant is low nitrogen compound, it exhibit low competition with sulfur compound and weakly adsorbed on the catalyst surface.
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SearchWorks Catalog Stanford Libraries. Organometallic modeling of the hydrodesulfurization and hydrodenitrogenation reactions. Responsibility by Roberto A.
Imprint Dordrecht ; Boston: Kluwer Academic Publishers, c Journal of the American Chemical Society 7 , , Mini reviews in medicinal chemistry 4 1 , , Journal of the American Chemical Society 10 , , Journal of Medicinal Chemistry 36 14 , , Journal of medicinal chemistry 47 21 , , Journal of Molecular Catalysis A: Chemical 96 3 , , Journal of the American Chemical Society 15 , , Chemical , , Journal of the American Chemical Society 33 , , Articles 1—20 Show more.
Breaking C-S bonds with transition metal complexes. Toward a novel metal-based chemotherapy against tropical diseases.