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Cited by 19 publications
(9 citation statements)
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“…2(b), the total number of acidic sites was found to decrease with increasing platinum content, as previously reported by Mouli et al [21] when studying Pt-Ir/FAU catalysts. Some authors [22,23] have suggested that this behavior may result from direct anchoring on proton sites and from blockage of zeolitic channels by platinum particles. De Lucas et al [9] evaluated the effect of metal loading in the hydroisomerization of n-octane over Pt-Pd/BEA.…”
Section: Support and Catalytic Precursor Characterizationmentioning
confidence: 99%
“…2(b), the total number of acidic sites was found to decrease with increasing platinum content, as previously reported by Mouli et al [21] when studying Pt-Ir/FAU catalysts. Some authors [22,23] have suggested that this behavior may result from direct anchoring on proton sites and from blockage of zeolitic channels by platinum particles. De Lucas et al [9] evaluated the effect of metal loading in the hydroisomerization of n-octane over Pt-Pd/BEA.…”
Section: Support and Catalytic Precursor Characterizationmentioning
confidence: 99%
“…The platinum atoms dispersed in the zeolitic surface, by virtue of their vacant d-orbitals (a property of transition metals), facilitate the formation of carbocations and hence enhance the rate of methylation of toluene in spite of decreasing the number and strength of the acid sites in these catalysts. 4,5,42,43 For the same reason, this reaction is also enhanced using the Pt-loaded H-MOR catalysts.…”
Section: Methylation Of Toluene On Platinum-loaded H/zsm-5mentioning
confidence: 96%
“…The acidity parameters (number & strength), as well as the dispersion of Pt in the Pt/zeolite catalysts (Table 2), in general are found to be diminished with increasing the percentage of platinum incorporated in the zeolite support, 4,5,42,43 since platinum crystallites mask the strongest acid sites in the zeolite, or have somehow exchanged protons in the si1icaalumina framework. Furthermore, Pt incorporation may play a role in decreasing the dimension of the zeolitic channels.…”
Section: Reactions On Platinum-loaded H/zsm-5 and H-mor Catalystsmentioning
confidence: 99%
“…In other words, though acid leaching decreases diffusion limitation, however, Van Bokhoven et al (2001) found that extra framework Al is produced predominantly after steaming and this may increase, diffusion limitation. Aboul-Gheit et al (1998, 1999 …”
Section: Introductionmentioning
confidence: 99%