4.5 Article

Ketone-group containing condensed organic molecules supported on SBA-15 for the oxidative dehydrogenation of ethylbenzene to styrene

Journal

MOLECULAR CATALYSIS
Volume 517, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.mcat.2021.112018

Keywords

Metal-free catalysis; C-H activation; Oxidative dehydrogenation; Ketone group; Supported catalysts

Funding

  1. National Nature Science Foundation of China [21103030]
  2. China Postdoctoral Science Foundation [2018T110825]
  3. Natural Science Foundation of Hunan Province, China [2018JJ3883]
  4. China Geological Survey Project [DD20190589]
  5. National Key Research and Development Plan [2016YFC0600605]
  6. Chinese Academy of Geological Sciences Fundamental Research Project [YYWF201619]

Ask authors/readers for more resources

Clearing the catalytic activity centers is crucial for developing metal-free catalysts and understanding their reactions. In the case of oxidative dehydrogenation of ethylbenzene to styrene, both single ketone and diketone groups can act as active centers, with the diketone-based catalyst showing higher activity. The transfer of hydrogen from ethylbenzene to ketone groups is likely a key step in the reaction.
To make clear the catalytic activity centers for the metal-free catalysts is of key importance for the further development of metal-free catalysts and understanding the metal-free catalytic reactions. The single ketone and diketone group containing catalysts with extremely low metal content were prepared for exploring the relationship between the types of functional groups in the catalysts and their catalytic performance. Both single ketone and diketone groups can play the role of active centers for catalytic oxidative dehydrogenation of ethylbenzene (ODH of EB) to styrene. More importantly, the activity of diketone group based catalyst was about two times of that of single ketone group based catalyst under proper test condition. The apparent activation energy of diketone-based catalysts reached 86 kJ center dot mol-1, and that of single ketone group was 114 kJ center dot mol-1. The hydrogen transfer from ethylbenzene to ketone groups may be the critical step for the oxidative dehydrogenation of ethylbenzene to styrene.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.5
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available