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

Journal Article · Tue Mar 01 00:00:00 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), Vol. 80:1
• Country of Publication: United States
• Language: English

Related Subjects

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