Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 190, Issue -, Pages 275-283Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2014.02.018
Keywords
Mn-MCM-41; In situ reduction method (ISR); Template-ion exchange (TIE); Alkene epoxidation; Hydrogen peroxide
Categories
Funding
- National Natural Science Foundation of China [21203102]
- National High Technology Research and Development Program of China [2012AA063008]
- Doctoral Program of Higher Education [20100031120029]
- Central Universities
- 111 Project [B12015]
Ask authors/readers for more resources
Manganese containing mesoporous materials Mn-MCM-41 were prepared by template-ion exchange (TIE), in situ reduction (ISR), direct hydrothermal (DHT) and wetness impregnation (WI) methods. The samples were characterized by XRD, N-2 adsorption-desorption, HR-TEM, TG, UV-Vis, H-2-TPR and ESR techniques, which illustrated that the definite structure of the MCM-41 was retained after introducing Mn into MCM-41 by different method. The catalytic activity and selectivity of the Mn-MCM-41 in the epoxidation of styrene with 30% H2O2 as an oxidant agent were explored. The TIE catalysts showed the highest activity but Mn2+ was leached during the reaction. The ISR catalysts exhibited high activity for epoxidation of styrene. Furthermore, recycling studies proved the ISR catalysts as heterogeneous catalysts, which did not lose the catalytic activity after four recycles appreciably. However, the DHT and WI catalysts showed poor performance in the catalytic epoxidation of styrene. Various parameters such as different reaction molar ratio of H2O2/styrene, catalyst amount, and kinds of solvents were studied to optimize the reaction conditions. (C) 2014 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available