Kinetic and mechanistic insights into Ni-AlKIT-6 catalyzed ethylene oligomerization

A kinetic study of the ethylene oligomerization on a mesoporous 2 wt% Ni-AlKIT-6 was performed in a fixed bed flow reactor. The temperature ranged from 40 to 120 °C, the inlet ethylene partial pressure from 0.1 to 2.0 MPa and the space velocity (WHSV) was between 37 and 240 h −1 . The main products...

Full description

Saved in:
Bibliographic Details
Published in:Reaction chemistry & engineering 2021-12, Vol.7 (1), p.133-141
Main Authors: Beucher, Remi, Hulea, Vasile, Cammarano, Claudia
Format: Article
Language:English
Subjects:
Butenes
Catalysis
Chemical Sciences
Ethylene
Fixed beds
Hexenes
Insertion
Oligomerization
Partial pressure
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A kinetic study of the ethylene oligomerization on a mesoporous 2 wt% Ni-AlKIT-6 was performed in a fixed bed flow reactor. The temperature ranged from 40 to 120 °C, the inlet ethylene partial pressure from 0.1 to 2.0 MPa and the space velocity (WHSV) was between 37 and 240 h −1 . The main products identified at low ethylene conversion were n -butenes (90%) and hexenes (9%). A coordination-insertion mechanism (Cossee-Arlman) was proposed to explain the formation of these primary products. An activation energy of 15.2 kJ mol −1 and a global kinetic order of 1.28 were determined. The experimental data suggest that the kinetically limiting step is the insertion of ethylene into the metal-alkyl bond. An experimental study of the ethylene dimerization and isomerization performed on a mesoporous 2 wt% Ni-AIKIT-6 showed that the kinetically determining step is the insertion of ethylene in the metal-alkyl bond at the nickel site neighborhood.
ISSN:2058-9883
2058-9883
DOI:10.1039/d1re00258a