Author, Subjects, Keywords

Cited Author

 
 
   » By Author or Editor
 » Browse Author by Alphabet
 » By Journal
 » By Subjects
 » By Affiliations
 » By Type
 » By Year
 » By Latest Additions
 
 
   » By Author
 » Top 20 Authors
 » Top 20 Article
 » Top 20 Journal Cited
 » Top 20 Cited
 » Top 20 Author Cited
 » Usage Since Sept 2007


 
 
 

Login | Create Account

Studies on the Reaction of Oxygen with Preoxidised Bismuth Molybdate Catalyst

Irmawati Ramli, and Waugh, Kenneth C. and Bahij H. Sakakini, (2007) Studies on the Reaction of Oxygen with Preoxidised Bismuth Molybdate Catalyst. Malaysian Journal of Analytical Sciences, 11 (1). pp. 287-293. ISSN 13942506

Full text not available from this repository.

Official URL: http://pkukmweb.ukm.my/~mjas/v11_n1/43_67PC8_IR_Iz-1.pdf

Affiliations

Universiti Putra Malaysia, Dept. of Chemistry
University of Manchester, Dept. of Chemistry

Abstract

Transient techniques of gas adsorption chromatography (GAC) and temperature programmed desorption (TPD) were used to study the interaction of oxygen species with preoxidised bismuth molybdate supported silica catalyst. Results showed (i) that the adsorption of oxygen atom at low adsorption temperature may results in the atom to be physically adsorbed on the surface of the activated catalyst, consistent with an activation energy of 28 kJ mol-1 obtained from low temperature TPD, and (ii) that the amount of roughly 3.7 % of the total oxygen content has been desorbed in the coverage of more than a monolayer of chemisorbed oxygen in the TPD from ambient to 1173 K of the activated catalyst.

Teknik alihan iaitu kromatografi penjerapan gas (GAC) dan nyahjerapan terprogram suhu telah digunakan untuk mengkaji interaksi spesis oksigen dengan mangkin pra-teroksida bismut molibdena tersokong silika. Keputusan kajian menunjukkan (i) jerapan atom oksigen pada suhu rendah jerapan menyebabkan atom tersebut cuma terjerap secara fizikal pada permukaan mangkin teraktif, konsisten dengan nilai tenaga pengaktifan 28 kJ mol-1 diperolehi dari suhu rendah TPD, dan (ii) amaun sekitar 3.7 % dari keseluruhan kandungan oksigen telah berjaya dinyahjerap dalam liputan lebih dari ekalapis oksigen tererapkimia di TPD dari ambien hingga 1173 K pada mangkin teraktif.

Item Type:Journal
Additional Information:Financial support from the Malaysian Government is gratefully acknowledged.
Keywords:Oxygen, gas adsorption chromatography, desorption, bismuth molybdate, activation energy
Subjects:Q Science
ID Code:1058

[1] G.W. Keulks, M.P. Rosynek, C. Daniel, 1971, Bismuth molybdate catalysts. Kinetics and mechanism of propylene oxidation. Ind. Eng. Chem. Prod. Res. Dev., 10(2), 138-42.

[2] E.G. Bithell, R.C. Doole, M.J. Goringe, M.D. Allen, M. Bowker, 1994, Crystallographic and microstructural changes in FeSbO4 under reducing conditions, Phy. St. Sol. A: Appl. Res., 146(1), 461-75.

[3] B. Zhou, X. Guo, and K.T. Chuang, 1993, Role of molybdenum and antimony in oxide catalysts for selective oxidation of propylene, Stud. Surf. Sc. Cat., 75, 1963-6.

[4] W.M.H. Sachtler, and N.H. de Boer, 1965 Catalytic oxidation of propylene to acrolein, Proc. Intern. Congr. Catal., 3rd. Amsterdam, 1964, 1 252-63.

[5] K. Aykan, 1968, Reduction of bismuth oxide-molybdenum trioxide catalyst during the ammoxidation of propylene in the absence of gaseous oxygen, J. Catal., 12(3), 281-90.

[6] P. Mars and D.W. van Krevelen, 1954, Oxidations carried out by means of vanadium oxide catalysts, Chem. Eng. Sci., 3(Spec. Suppl.), 41-59 .

[7] R.K. Grasselli, J.D. Burrington, 1984, Molecular probes for the mechanism of selective oxidation and ammoxidation catalysis, Ind. Eng. Chem. Prod. Res. Dev., 23(3), 393-404.

[8] R.K. Grasselli, 1987, Factors affecting selectivity and activity of oxidation catalysts, React. Kinet. Catal. Lett., 35(1-2),327-35.

[9] L.D. Krenzke, G.W. Keulks, 1980, The catalytic oxidation of propylene. VI. Mechanistic studies utilizing isotropic tracers, J. Catal., 61(2), 316-25.

[10] R.D. Wragg, P.G. Ashmore, J.A. Hockey, 1971, Selective oxidation of propene over bismuth molybdate catalysts. Oxidation of propene using oxygen-18-labeled oxygen and catalyst. J. Catal., 22(1), 49-53.

[11] Y. Moro-oka, W. Ueda, 1994, Multicomponent bismuth molybdate catalyst: a highly functionalized catalyst system for the selective oxidation of olefins. Adv. Catal., 40, 233-73.

[12] I. Ramli, K.C. Waugh, and B.H. Sakakini, 2000, Preparation and characterisation of bismuth molybdate catalysts, Malays. J. Anal. Sci. 7(2) .

[13] K.C. Waugh, 1988, In situ study of catalysts: application in methanol synthesis and ethylene epoxidation, Appl. Catal. 43(2), 315-37.

[14] K.C. Waugh, 1978, Determination of surface heteroenergeneity in catalysts by gas adsorption chromatography. Adsorption of hydrogen fluoride on chromic fluoride. J. Chromatogr. 155(1), 83-95.

Repository Staff Only: item control page
 
 
 
 
 
   
© Copyright 2007 MyAIS Faculty of Computer Science and Information Technology, University of Malaya – All Rights Reserved. Malaysian Abstracting and Indexing System is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.