Effect of acidity and ruthenium species on catalytic performance of ruthenium catalysts for acetylene hydrochlorinationElectronic supplementary information (ESI) available: Fig. S1-S7, Tables S1 and S2, see ESI. See DOI: 10.1039/c8cy01677a
Carbon-supported ruthenium catalysts are promising mercury-free catalysts for acetylene hydrochlorination, due to their high activity and relatively low price. However, ruthenium catalysts often suffer from serious deactivation. Herein, a stable RuCl 3 -A/AC catalyst was prepared by applying a simpl...
Saved in:
Main Authors | , , , , |
---|---|
Format | Journal Article |
Published |
26.11.2018
|
Online Access | Get full text |
Cover
Loading…
Summary: | Carbon-supported ruthenium catalysts are promising mercury-free catalysts for acetylene hydrochlorination, due to their high activity and relatively low price. However, ruthenium catalysts often suffer from serious deactivation. Herein, a stable RuCl
3
-A/AC catalyst was prepared by applying a simple ammonia treatment during the impregnation process. The fresh and used ruthenium catalysts were comprehensively characterized using N
2
sorption, NH
3
-temperature-programmed desorption (NH
3
-TPD), H
2
temperature-programmed reduction (H
2
-TPR), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). The results show that the RuCl
3
species is identified as the active species, and the surface acidity of the RuCl
3
/AC catalyst is generated mainly from supported RuCl
3
species, which can easily cause coke deposition. The enhancement of the stability of the RuCl
3
-A/AC catalyst is attributed to the formation of RuO
x
species and the decrease of the surface acidity.
Carbon-supported ruthenium catalysts are promising mercury-free catalysts for acetylene hydrochlorination, due to their high activity and relatively low price. The deactivation mechanism was identified and solved by a simple ammonia treated method. |
---|---|
Bibliography: | Electronic supplementary information (ESI) available: Fig. S1-S7, Tables S1 and S2, see ESI. See DOI 10.1039/c8cy01677a |
ISSN: | 2044-4753 2044-4761 |
DOI: | 10.1039/c8cy01677a |