Mesoporous silica–alumina modified by acid leaching as support of Pt catalysts in HDS of model compounds
Applied Catalysis B: Environmental, ISSN: 0926-3373, Vol: 100, Issue: 3, Page: 463-471
2010
- 22Citations
- 25Captures
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Article Description
The potential of mesoporous silica–alumina (MSA) modified by acid leaching as alternative support for Pt catalysts was studied in hydrodesulfurization (HDS) of thiophene and benzothiophene. The supports were characterized by N 2 adsorption, XRD, 27 AL MAS NMR, electron microscopy (SEM, HRTEM) and by activities in cyclohexene isomerization and cumene cracking. The composition of the catalysts and Pt dispersion were determined by ICP and H 2 or CO sorption, respectively. Progressive leaching of the parent MSA from 50% Al 2 O 3 to 11% Al 2 O 3 content led to increase of the BET surface area and exposition of strong acidity. This positively affected the activities of the reduced Pt catalysts in thiophene HDS. Deposition of 1.5 wt.% Pt on MSA (11% Al 2 O 3 ) by using Pt(NH 3 ) 4 (OH) 2 as precursor gave the best catalyst, several times more active in thiophene HDS than the weight equivalents of sulfided CoMo/Al 2 O 3 or reduced Pt/HY zeolite. In benzothiophene reaction, its activity was slightly above that of CoMo/Al 2 O 3 and about twofold compared to Pt/HY.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0926337310003759; http://dx.doi.org/10.1016/j.apcatb.2010.08.022; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=77957797063&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0926337310003759; https://api.elsevier.com/content/article/PII:S0926337310003759?httpAccept=text/xml; https://api.elsevier.com/content/article/PII:S0926337310003759?httpAccept=text/plain; https://dx.doi.org/10.1016/j.apcatb.2010.08.022
Elsevier BV
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