SUPPORT EFFECT STUDIES ON TiOz-AhO3 MIXED OXIDE HYDRO PROCESSING CATALYSTS
IR@IIP: CSIR-Indian Institute of Petroleum, Dehradun
View Archive Info| Field | Value | |
| Creator |
Srinivas,B.N
Maity,S.K Prasad,V.V.D.N Rana,M.S Manoj, Kumar Murali Dhar,G Rao,T.S.R Prasada |
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| Date |
2009-07-15T11:06:04Z
2009-07-15T11:06:04Z 2009-07-15T11:06:04Z |
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| Identifier |
Recent Advances in Basic and Applied Aspects of Industrial Catalysis Studies in Surface Science and Catalysis, Vol. 113
http://hdl.handle.net/123456789/344 |
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| Description |
TiOz-AlzO3 supports with varying TiOz/AhO3 ratios were synthesized by homogeneous
precipitation technique and these supports were found to be of high surface area and reasonably
high surface area is also obtained in the case of Co and Ni promoted catalysts. X ray diffraction
data indicated that in titania rich regions anatase is observed and in y -AhO3 rich region of mixed
oxide presented anatase as well as y-AhO3 peaks are noticed, where as a TiOz-AhO3 (50:50)
samples are nearly X-ray amorphous indicating that this region presents highly intimate mixture
of TiOz and AhO3. Except on TiOz supported system, there is no evidence for XRD for any
crystalline phases of WO3 indicating a good dispersion of WO3. The oxygen chemisorption
measurements indicated that oxygen chemisorption passes through a maximum at TiOz-AhO3
(50:50) support both on tungsten alone and Co Ni promoted catalysts. The Temperature
Programmed Reduction studies indicated that on TiOz and TiOz rich TiOz-AhO3 mixed oxide
supports the tungsten oxide interacts weakly with support compared to AhO3 and AhO3 rich
TiOz-AhO3 supports where WO3 is found to interact strongly. The catalytic activities for various
catalytic functionalities such as Hydrodesulfurization (HDS) and Hydrogenation (HYD) were
evaluated and the results indicated the pattern of activity variation is very similar to that of
oxygen uptakes suggesting that there is a relationship between oxygen chemisorption and
catalytic functionalities but lack of strictly linear relationship casts some doubts on the
applicability of oxygen chemisorption catalysts prepared by varying the support. These results
suggested that oxygen chemisorption is not specific to anyone of the functionalities but measures
general state of dispersion.
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| Language |
en_US
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| Subject |
Heterogeneous Catalysis
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| Title |
SUPPORT EFFECT STUDIES ON TiOz-AhO3 MIXED OXIDE HYDRO PROCESSING CATALYSTS
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| Type |
Article
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