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Indole Hydrodenitrogenation over Alumina and Silica-Alumina-Supported Sulfide Catalysts--Comparison with Quinoline.
- Source :
-
Industrial & Engineering Chemistry Research . Oct2017, Vol. 56 Issue 39, p11088-11099. 12p. - Publication Year :
- 2017
-
Abstract
- A detailed kinetic model was proposed to analyze experimental data obtained from indole hydrodenitrogenation (HDN) over γ-Al2O3 and amorphous silica-alumina (ASA)-supported NiMo catalysts. The goal was to investigate the support acidity effects on indole HDN and compare with a recent study on quinoline HDN. Similarly to quinoline HDN, indole HDN occurred via hydrogenation of the aromatic ring, followed by N-ring opening and exocyclic C-N bond breaking. The high support acidity of NiMo(P)/ASA exhibited a promoting effect for N-removal steps and adsorption of nitrogen compounds. However, in contrast to quinoline HDN, it did not clearly induce a positive effect for the hydrogenation step. The acidic function of ASA also favored the formation of byproducts such as toluene, cyclohexane, dimer, and trimer of indole. Catalytic conversion of a quinoline and indole mixture revealed a strong inhibiting effect of quinoline on indole HDN, whereas the inhibiting effect of indole on quinoline HDN was weak. The inhibition was weaker over NiMo(P)/Al2O3 than over NiMo(P)/ASA. This result is in agreement with a relative ranking of apparent adsorption constants of quinoline, indole, and their products on NiMo(P)/Al2O3 and ASA. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SILICA
*ALUMINUM oxide
*INDOLE
*HYDROGENATION
*CATALYST supports
*SULFIDES
*QUINOLINE
Subjects
Details
- Language :
- English
- ISSN :
- 08885885
- Volume :
- 56
- Issue :
- 39
- Database :
- Academic Search Index
- Journal :
- Industrial & Engineering Chemistry Research
- Publication Type :
- Academic Journal
- Accession number :
- 126046881
- Full Text :
- https://doi.org/10.1021/acs.iecr.7b02993