Kinetics studies and mechanism evolution of the epoxidation of styrene over nanoporous Au doped TS-1

被引：3

作者：

Saxena, Samidha ^{[1
]}

Dwivedi, Reena ^{[1
]}

Bhadauria, Sheenu ^{[1
]}

Chumbhale, V. R. ^{[2
]}

Prasad, Rajendra ^{[1
]}

机构：

[1] Devi Ahilya Univ, Sch Chem Sci, Catalysis & Nanomat Res Lab, Indore 452001, Madhya Pradesh, India

[2] Natl Chem Lab, Catalysis Div, Pune 8, Maharashtra, India

来源：

POLISH JOURNAL OF CHEMICAL TECHNOLOGY | 2010年 / 12卷 / 04期

关键词：

Kinetics; Epoxidation; Au/TS-1; styrene; Styrene Oxide; TITANIUM SILICATE; CATALYTIC-PROPERTIES; HYDROGEN-PEROXIDE; OXIDIZING-AGENT; OXIDATION; ZEOLITES; ACIDITY; ALKANES; OXIDE;

D O I：

10.2478/v10026-010-0054-6

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A kinetic investigation of the slurry phase epoxidation of styrene with hydrogen peroxide has been carried out, for the first time, over nanoporous Au doped TS-1 catalyst, in a batch reactor, in the temperature range of 313-333 K. It was found that product selectivity and the rate of reaction are greatly influenced by concentrations of styrene and hydrogen peroxide. Kinetics studies reveal that the mechanism of the reaction is of the "Redox" type. The rate equation, r = k(1) k(2) P-O P-H /(k(1) P-O + k(2) P-H) deduced, assuming a steady state involving two stage oxidation-reduction process, represent the data most satisfactorily for the conversion of styrene to styrene oxide. A tentative mechanism of the process has also been suggested.

引用

页码：72 / 78

页数：7

共 23 条

[1] Enantioselective epoxidation of olefins with molecular oxygen catalyzed by gold(III): A dual pathway for oxygen transfer [J].

Corma, Avelino ;

Dominguez, Irene ;

Domenech, Antonio ;

Fornes, Vicente ;

Gomez-Garcia, Carlos J. ;

Rodenas, Tania ;

Sabater, Maria J. .

JOURNAL OF CATALYSIS, 2009, 265 (02) :238-244

[2] LOW-TEMPERATURE OXIDATION OF CO OVER GOLD SUPPORTED ON TIO2, ALPHA-FE2O3, AND CO3O4 [J].

HARUTA, M ;

TSUBOTA, S ;

KOBAYASHI, T ;

KAGEYAMA, H ;

GENET, MJ ;

DELMON, B .

JOURNAL OF CATALYSIS, 1993, 144 (01) :175-192

[3] OXYFUNCTIONALIZATION OF ALKANES WITH HYDROGEN-PEROXIDE ON TITANIUM SILICALITE [J].

HUYBRECHTS, DRC ;

DEBRUYCKER, L ;

JACOBS, PA .

NATURE, 1990, 345 (6272) :240-242

[4] Adsorption of small Aun (n=1-5) and Au-Pd clusters inside the TS-1 and S-1 pores [J].

Joshi, Ajay M. ;

Delgass, W. Nicholas ;

Thomson, Kendall T. .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (33) :16439-16451

[5] STUDIES ON THE CATALYTIC-OXIDATION OF ALKANES AND ALKENES BY TITANIUM SILICATES [J].

KHOUW, CB ;

DARTT, CB ;

LABINGER, JA ;

DAVIS, ME .

JOURNAL OF CATALYSIS, 1994, 149 (01) :195-205

[6] EPOXIDATION OF STYRENE OVER A TITANIUM SILICATE MOLECULAR-SIEVE TS-1 USING DILUTE H2O2 AS OXIDIZING-AGENT [J].

KUMAR, SB ;

MIRAJKAR, SP ;

PAIS, GCG ;

KUMAR, P ;

KUMAR, R .

JOURNAL OF CATALYSIS, 1995, 156 (01) :163-166

[7] Selective epoxidation of styrene to styrene oxide over TS-1 using urea-hydrogen peroxide as oxidizing agent [J].

Laha, SC ;

Kumar, R .

JOURNAL OF CATALYSIS, 2001, 204 (01) :64-70

[8] Ti location in the MFI framework of Ti-silicalite-1:: A neutron powder diffraction study [J].

Lamberti, C ;

Bordiga, S ;

Zecchina, A ;

Artioli, G ;

Marra, G ;

Spanò, G .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (10) :2204-2212

[9]

Mars P., 1954, Chem. Eng. Sci., V3, P41, DOI DOI 10.1016/S0009-2509(54)80005-4

[10] Direct epoxidation of propene using gold dispersed on TS-1 and other titanium-containing supports [J].

Nijhuis, TA ;

Huizinga, BJ ;

Makkee, M ;

Moulijn, JA .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1999, 38 (03) :884-891

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