Ruthenium(III) ion-exchanged zeolite Y as highly active and reusable catalyst in decomposition of nitrous oxide to sole nitrogen and oxygen

Date

2014-09-01

Author

Curdaneli, Pelin Edinc
Özkar, Saim

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

96
views

0
downloads

Ruthenium(III) ion-exchanged zeolite Y, prepared by ion exchange of Ru+3 ions with the extra framework Na+ cations in zeolite Y with a Si/Al ratio of 2.5, is employed to catalyze the decomposition of nitrous oxide to nitrogen and oxygen. Catalytic activity of ruthenium(III) ion-exchanged zeolite Y is studied in the decomposition of nitrous oxide to nitrogen and oxygen depending on the ruthenium loading of zeolite and flow rate of nitrous oxide helium mixture in a continuous flow vertical reactor. The results collected reveal that ruthenium(III) ion-exchange zeolite with a ruthenium loading of 3.98 wt.% is highly active, long-lived, and reusable catalyst providing 100% conversion of nitrous oxide to sole nitrogen and oxygen at 350 degrees C without any side reaction. This catalyst can be bottled under ambient conditions and repeatedly used in successive runs of nitrous oxide decomposition for up to 5 months without significant loss in activity. Intrazeolite ruthenium(0) nanoclusters are slightly less active than the ruthenium(III) ion-exchanged zeolite Y in decomposition of nitrous oxide, which might be attributed to the migration of ruthenium(0) to the external surface before oxidation at high temperature. The other two metals of Group 8, iron(III) and osmium(III) ion-exchanged zeolite Y do not show activity as high as that of ruthenium(III) ion-exchanged zeolite Y in the same reaction. (C) 2014 Elsevier Inc. All rights reserved.

Subject Keywords

General Materials Science, Mechanics of Materials, General Chemistry, Condensed Matter Physics

URI

https://hdl.handle.net/11511/69993

Journal

MICROPOROUS AND MESOPOROUS MATERIALS

DOI

https://doi.org/10.1016/j.micromeso.2014.04.052

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Bromine mediated partial oxidation of ethane over nanostructured zirconia supported metal oxide/bromide Yılmaz, Ayşen; Zhou, XP; Lorkovic, IM; Ylmaz, GA; Laverman, L; Weiss, M; Sun, SL; Schaefer, D; Sherman, JH; McFarland, EW; Ford, PC; Stucky, GD (Elsevier BV, 2005-04-01) Partial oxidation of ethane to an array of products was achieved through use of bromine/supported metal bromide as redox mediator for oxygen activation. In a two stage flowing fixed bed reactor, ethane bromination (350-450 degrees C) to EtBr and HBr was followed by metathesis of these intermediates with supported cobalt or copper oxides (200-250 degrees C) to produce ethanol (up to 64% selectivity at 45% EtBr conversion), diethyl ether (64% selectivity at 44% conversion), and ethylene (26% selectivity at 68...
Conducting polymers of decanedioic acid bis-(4-pyrrol-1-yl-phenyl) ester Çırpan, Ali; Toppare, Levent Kamil (Elsevier BV, 2004-05-15) A dipyrrolyl monomer was synthesized via the reaction between 4-pyrrol-1-yl phenol and decanedioyl dichloride. The electrochemical behavior of this monomer was studied. Polymerization of decanedioic acid bis-(4-pyrrol-1-yi-phenyl) ester (DAPE) was achieved by chemical and constant current electrolyses methods. Copolymerization of DAPE with thiophene was performed by constant potential electrolysis in acetonitrile-tetrabutylammonium tetrafluoroborate (TBAFB), dichloromethane-TBAFB, solvent-electrolyte couple...
Conducting polymers of octanoic acid 2-thiophen-3-yl-ethyl ester and their electrochromic properties CAMURLU, P; Çırpan, Ali; Toppare, Levent Kamil (Elsevier BV, 2005-08-15) Octanoic acid 2-thiophen-3-yl-ethyl ester was synthesized via the reaction of 3-thiophene ethanol with octanoyl chloride. The resulting monomer was electrochemically homopolymerized in the presence of tetrabutylammonium tetrafluoroborate as the supporting electrolyte, in the acetonitrile/borontrifluoride ethyl ether solvent system. The resulting polymer was characterized using various experimental techniques. Spectroelectrochemistry analysis of the homopolymer reflects electronic transitions at 434, approxi...
Crystallization of silicalite-1 from clear synthesis solutions: Effect of template concentration on crystallization rate and crystal size Soydas, B.; Çulfaz Emecen, Pınar Zeynep; Kalıpçılar, Halil; Culfaz, A. (Wiley, 2009-08-01) Synthesis of silicalite-1 powders and membranes from initially clear solutions with different tetrapropylammonium hydroxide or bromide concentrations was studied. While tetrapropylammonium bromide acts only as template, tetrapropylammonium hydroxide provides both the template and hydroxyl ions to the synthesis medium. The effects of template and hydroxyl ion concentration on the product yield, crystallization rate and crystal size were investigated. Pure and highly crystalline silicalite-1 was obtained with...
Preparation and characterization of zeolite framework stabilized cuprous oxide nanoparticles Zahmakiran, Mehmet; Özkar, Saim (Elsevier BV, 2009-05-15) Zeolite framework stabilized copper(I) oxide nanoparticles (4.8 +/- 2.6 nm) were prepared for the first time by using a four step procedure: the ion exchange of Cu(2+) ions with the extra framework Na(+) ions in Zeolite-Y, the reduction of the Cu(2+) ions within the cavities of zeolite with sodium borohydride in aqueous solution, the dehydration of Zeolite-Y with the copper(0) nanoclusters, and the oxidation of intrazeolite copper(0) nanoclusters by O(2) at room temperature. Zeolite stabilized copper(I) oxi...

Citation Formats

P. E. Curdaneli and S. Özkar, “Ruthenium(III) ion-exchanged zeolite Y as highly active and reusable catalyst in decomposition of nitrous oxide to sole nitrogen and oxygen,” MICROPOROUS AND MESOPOROUS MATERIALS, pp. 51–58, 2014, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/69993.