The determination of accessible Pt metal fraction in Pt±Sn/Al2O3 reforming catalyst
IR@IIP: CSIR-Indian Institute of Petroleum, Dehradun
View Archive Info| Field | Value | |
| Creator |
Sharma, L.D
Manoj, Kumar Saxena, A.K Rawat, D.S Rao, T.S.R Prasada |
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| Date |
2010-07-26T07:03:57Z
2010-07-26T07:03:57Z 2010-07-26T07:03:57Z |
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| Identifier |
Applied Catalysis A: General 168 (1998) 251±259
http://hdl.handle.net/123456789/723 |
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| Description |
An attempt has been made to provide a simple method for the determination of accessible Pt metal fraction in Pt±Sn/Al2O3
catalyst. The complications in Pt±Sn/Al2O3 system arise mainly due to uncertainties involved in the oxidation states of tin:
Sn0, Sn2 and Sn4 in the reduced catalyst. H2, O2 chemisorption/titrations originally applied to Pt/Al2O3 were extended to
the Pt±Sn/Al2O3 system. Two oxygen titration cycles OT1 and OT2 at room temperature were carried out using a dynamic
pulse ¯ow technique. Only part of the total Sn in the catalyst is reduced to Sn0 (15%), which contributes to oxygen uptake.
While OT1 is a linear function of the Sn content in the catalyst, the second oxygen titration OT2 gives the accessible Pt metal
fraction only. It has been concluded that oxygen chemisorption/titrations at temperatures higher than ambient under dynamic
conditions are not reliable for the determination of metal dispersions. # 1998 Elsevier Science B.V.
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| Language |
en_US
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| Subject |
Reforming Catalyst
Pt±Sn/Al2O3 Pt Metal Fraction |
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| Title |
The determination of accessible Pt metal fraction in Pt±Sn/Al2O3 reforming catalyst
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| Type |
Article
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