| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 50524 | Catalysis Communications | 2011 | 7 Pages |
Ni-MCM-41 has been prepared by equilibrium adsorption of different nickel precursors. Nickel citrate and nickel nitrate gave the most active catalysts for the direct transformation of ethene into propene above 250 °C at atmospheric pressure. The maximal ethene conversion at 400 °C was 36% while propene selectivity reached 45%. Analysis of product formation spectra at different temperatures, residence times and inlet compositions revealed reaction kinetics consistent with a sequence of ethene dimerization, positional butene isomerization and propene retro-metathesis.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► Equilibrium adsorption gave active catalysts for the ethene to propene reaction. ► Maximal propene selectivity was 45% combined with an ethene conversion of 36%. ► Only minor amounts of byproducts (ethane, iso-butene, and hexenes) were formed. ► Reaction network: ethene dimerization, butene isomerization, and propene retro-metathesis. ► Moderate catalyst deactivation at 375 °C: conversion drop from 36 to 25% in 55 h.
