Journal ArticleDOI
Synthesis and characterization of solid-phase super acid catalysts and their application for isomerization of n-alkanes
TLDR
In this paper, the reference ACSZ-2 showed high activity toward isomerization of n-hexane, n-heptane, and n-octane into their corresponding branched chain isomers.Abstract:
In the present work, first, the reference catalyst super acidic nanostructured sulfated zirconia (SZ) and super acidic nanostructured aluminum chloride impregnated sulfated zirconium oxides in mole ratios of Zr4+:Al3+ as 2:1 (ACSZ-1), 1:1 (ACSZ-2), and 1:2 (ACSZ-3) were synthesized by a simple precipitation method. The catalytic performance of these four catalysts were evaluated during the isomerization of n-hexane, n-heptane, and n-octane to their corresponding branched chain isomers at low temperature and pressure conditions. ACSZ-2 shows high activity toward isomerization of n-hexane, n-heptane, and n-octane into their corresponding branched chain isomers. The reference catalyst SZ was proved to be less effective compare to the other three synthesized ACSZ catalysts. Ammonia-temperature-programmed desorption of these two materials ensures that the super acidity of ACSZ-2 is higher than that of SZ. Atomic force microscopic and scanning electron microscopic pictures predict the nature of the surf...read more
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Bifunctional catalysts for the hydroisomerization of n-alkanes: the effects of metal–acid balance and textural structure
Wei Wang,Chang-jun Liu,Wei Wu +2 more
TL;DR: In this article, a review of the recent advances in the development of bifunctional catalysts for n-alkane hydroisomerization is presented, as well as the catalytic behaviors and the reaction mechanisms over catalysts.
Journal ArticleDOI
Rich and Stable Interlayer Porous Bamboo Carbon Sulfonic Acids Constructed by Silica Intercalation as Cheap and Robust Acid Catalysts
TL;DR: The rich and stable interlayer porous biomass carbon sulfonic acids (SBCSAs) pillared by silica were prepared conveniently using bamboo powder and water glass as main raw materials and investigated.
Journal ArticleDOI
Synergic role of platinum (Pt) and molybdenum trioxide (MoO3) promoted HBEA zeolite towards n-heptane isomerization
TL;DR: In this article, the potentiality of Pt and MoO3 loading on HBEA zeolite in enhancing n-heptane isomerization was investigated, and the results of in-situ FTIR studies of low-temperature hydrogen adsorption and n-Heptane adaption analyses help elucidate the isomerisation mechanism.
Journal ArticleDOI
Catalytic Performance and Kinetic Modeling of n-Butane Isomerization over Metal Bearing Silicotungstic Acid Supported on Mesoporous KIT-6
TL;DR: In this paper , mesoporous KIT-6 support was synthesized hydrothermally and its structure was improved by impregnation with phosphotungstic acid (HPW), silicotungcial acid (HSiW), and some metals such as Pt, Pd, and Ce.
Journal ArticleDOI
Hydroisomerization of n-hexane over metal oxides-loaded fibrous silica catalyst for cleaner fuel production
N.S. Hassan,A. Jalil,L.Y. Twu,Nasrul Aizuddin Ab Fatah,H. U. Hambali,Iqbal Hussain,Muhammad Lutfi Firmansyah +6 more
TL;DR: In this article , a new band at 1610 cm−1 of Zn/KCC-1, corresponds to the presence of Lewis acid sites and Brønsted acid sites.
References
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Journal ArticleDOI
An in Situ ATR-FTIR Investigation of Sulfate Bonding Mechanisms on Goethite.
TL;DR: It was determined that in situ spectra of both schwertmannite and adsorbed sulfate are quite similar, suggesting that a continuum of outer- and inner-sphere sulfate occurs in both cases.
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Synthesis and characterization of sol–gel derived ZrO2 doped Al2O3 nanopowder
TL;DR: Al2O3-ZrO2 composite gel precursor powder containing 5-15 mol% ZrO 2 was prepared by wet chemical route in this paper, where the washed gel containing pseudoboehmite and amorphous zirconia was characterized with respect to DTA/TG, XRD and IR spectroscopy.
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Studies on the Catalytic Activity of Zirconia Promoted with Sulfate, Iron, and Manganese
TL;DR: The catalytic properties of iron and manganese-promoted sulfated zirconia (SFMZ) for the isomerization of n-butane to isobutane are investigated using various catalyst pretreatments and reaction conditions.
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Consequences of Acid Strength for Isomerization and Elimination Catalysis on Solid Acids
TL;DR: It is concluded that the energetic difficulty of a catalytic reaction, imposed by gas-phase reactant proton affinities in transition state analogues, does not determine its sensitivity to the acid strength of solid catalysts.