Influence of pore size distribution on Pt dispersion 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 Mool,Chand Gupta,J.K |
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| Date |
2009-07-01T11:00:13Z
2009-07-01T11:00:13Z 2009-07-01T11:00:13Z |
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| Identifier |
Journal of Molecular Catalysis A: Chemical 185 (2002) 135–141
http://hdl.handle.net/123456789/283 |
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| Description |
Pt-Sn/Al2O3 catalysts; Pt (0.35 wt.%), Sn (0.42 wt.%) and chlorine (∼1.0 wt.%) were prepared by incipient wetness impregnation
and characterized by nitrogen adsorption–desorption, NH3 adsorption microcalorimetry and H2–O2 titrations. In
catalysts with almost similar values of SBET (170–180m2 g−1), total acidity (0.32–0.36 mmolNH3 g−1), a significant variation
in Pt dispersion was observed with the difference in meso pore size distribution in 20–100Å diameter range. As the vol.% in
20–100Å range is increased from 18 to 63%, the Pt dispersion increased from 57 to 81%. A greater abundance of relatively
narrow meso pores (20–100Å diameter) facilitate the fine dispersion of Pt moieties on the alumina surface. At least, a 30%
fraction of the total pore volume should lie in 20–100Å pores in order to obtain a reasonably good Pt dispersion (∼75%).
Although, a further increase of volume in these pores from 30 to 60% improves the Pt dispersion, but decreases the total
pore volume presumably due to a sharp decline in larger pores (100–200 Å) which contribute more towards the pore volume.
Keywords: Pt-Sn/Al2O3; Pore size distribution; Pt dispersion; Reforming catalyst
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| Language |
en_US
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| Subject |
Reforming catalyst
Pore size distribution |
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| Title |
Influence of pore size distribution on Pt dispersion in Pt-Sn/Al2O3 reforming catalyst
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| Type |
Article
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