Temperature imposed textural and surface synergism affecting the isomerization activity of sulfated zirconia catalysts
نویسندگان
چکیده
منابع مشابه
Sulfated zirconia and tungstated zirconia as effective supports for Pd-based SCR catalysts
It is now well established that even though Pd supported on acidic zeolites is highly selective for CH4-SCR, zeolitic structures are susceptible to dealumination under hydrothermal environments. In this contribution, we have investigated the ability of non-zeolitic acidic materials to promote the SCR selectivity and stability in the presence of H2O and SO2. The results of catalytic activity mea...
متن کاملIn Situ Spectroscopic Investigation of Activation, Start-Up and Deactivation of Promoted Sulfated Zirconia Catalysts
Sulfated zirconia (SZ), unpromoted and promoted with 0.5–2.0 wt% Mn or Fe, was investigated by in situ IR and UV–vis spectroscopy during activation at 723–773 K and interaction with n-butane at 298–323 K. During start-up of the catalysts, the isomerization rate increases with the amount of water that is being formed, consistent with an activation of n-butane via oxidative dehydrogenation. Sulfa...
متن کاملConformal sulfated zirconia monolayer catalysts for the one-pot synthesis of ethyl levulinate from glucose
The primary goal of this preparation method was synthesis of uniformly coated ZrO2/SBA-15 materials exhibiting high dispersion and accessibility of zirconium using a layerwise deposition method to minimize growth of large crystallites. SBA15 was prepared the original method by Zhao et al.1 First 10g of SBA-15 was dried at 300°C for 4 hours. Then the dried SBA-15 and 58.5g of zirconium precursor...
متن کاملNO reduction by CH4 in the presence of excess O2 over Pd/sulfated zirconia catalysts
The selective catalytic reduction (SCR) of NO by methane in the presence of excess oxygen has been studied on a series of Pd catalysts supported on sulfated zirconia (SZ). This support is not as sensitive to structural damage by steaming as the acidic zeolites, such as H-ZSM-5 and H-Mor. In previous studies, it was shown that this type of acidic zeolites are able to stabilize Pd2+ ions and prom...
متن کاملConformal sulfated zirconia monolayer catalysts for the one-pot synthesis of ethyl levulinate from glucose.
Here we describe a simple route to creating conformal sulphated zirconia monolayers throughout an SBA-15 architecture that confers efficient acid-catalysed one-pot conversion of glucose to ethyl levulinate.
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ژورنال
عنوان ژورنال: Journal of the Serbian Chemical Society
سال: 2009
ISSN: 0352-5139,1820-7421
DOI: 10.2298/jsc0912429z