Catalytic hydrodeoxygenation. III. Interactions between catalytic hydrodeoxygenation of m-cresol and hydrodenitrogenation of indole

Journal Article · Tue Mar 01 04:00:00 EST 1983 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(83)90231-2· OSTI ID:5237549

Odebunmi, E O; Ollis, D F

Simultaneous hydrodenitrogenation (HDN) and hydrodeoxygenation (HDO) is studied with indole/m-cresol conversions over a sulfided CoMo HDS catalyst. The mutual inhibition of indole (and indoline) on HDO and of n-cresol on HDN is established. As with HDS/HDO reported in paper II, the HDN/HDO reactions appear to proceed on the same site. The relative reactivity of the indole and cresol, as well as an HDN intermediate, o-ethyl aniline, is m-cresol >> o-ethyl aniline > indole (indoline). Under the conditions of our study (P/sub H/sub 2// = 69 atm, T = 250-350/sup 0/C), the indole-indoline hydrogenation equilibrium is essentially achieved. The pure component conversion kinetics are adequately described by a two-site Longmuir-Hinshelwood form, the rate and binding constant values indicating correctly the relative reactivity and mutual inhibition magnitudes, thus confirming that simultaneous HDO and HDN proceed on the same surface sites. At the lower HDN temperatures, the intermediate o-ethyl aniline is converted to ethylbenzene, then ethylcyclohexane, while at or above 300/sup 0/C some ring hydrogenation to o-amino ethylcyclohexane precedes HDN. Hydrogenation, HDO, and HDN activities are completely recovered by 400/sup 0/C regeneration, in contrast to activity loss noted in paper II for simultaneous HDS/HDO.

• Research Organization: Univ. of California, Davis
• OSTI ID: 5237549
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 80:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AMINES
ANILINE
AROMATICS
AZAARENES
AZOLES
CATALYSIS
CATALYSTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT
CRESOLS
ELEMENTS
HETEROCYCLIC COMPOUNDS
HYDROGENATION
HYDROXY COMPOUNDS
INDOLES
INTERACTIONS
KINETICS
METALS
MOLYBDENUM
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENOLS
PYRROLES
REACTION KINETICS
TRANSITION ELEMENTS