Sulfated zirconia catalyst supported on MCM-41 mesoporous molecular sieve

Chen, Chang Lin; Cheng, Sheng-Tzong; Lin, Hong Ping; Wong, She Tin; Mou, Chung‐Yuan

doi:10.1016/s0926-860x(01)00504-x

Cited by 84 publications

(29 citation statements)

References 34 publications

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“…The conversion profiles show strong activity decay during the first 30 min on stream, followed by a slower deactivating region. Similar initial high rates of conversion for n-butane isomerization has already been reported by Mou et al for various mesoporous molecular sieve supported SZ materials [8][9][10]. One can also see that for the present MSZ samples prepared by the alcohothermal method, n-butane conversion increased in the order of Zr/ SO 2À 4 ¼ 12 < 8 < 4.…”

Section: Resultssupporting

confidence: 89%

“…Hence, the usefulness of these materials is greatly compromised due to their limited specific surface area. Higher surface areas are attainable by supporting SZ materials on mesoporous materials such as MCM-41, SBA-15 and FSM-16 [7][8][9][10][11][12], but this was usually achieved at the expense of low catalytic activity for alkane isomerization, which is possibly due to a decrease of their acidic strength [10].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of thermally stable mesostructured sulfated zirconia by a novel sulfate-assisted alcohothermal route

Cao

Wang

et al. 2005

Catal Lett

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Thermally stable mesostructured sulfated zirconia (MSZ) with a high surface area has been successfully prepared by a novel one-step synthetic method involving the alcohothermal processing of zirconium nitrate in the presence of ammonium sulfate. The MSZ samples were characterized using X-ray diffraction (XRD), N 2 adsorption measurements, thermal analysis (TG/DTA) and transmission electron microscopies (TEM). It is shown that the resulting mesostructured sulfated zirconia samples are tetragonal crystalline, which have a high specific surface area and a well-developed textural mesoporosity with narrow pore size distribution. Catalytic testing showed that the present mesostructured sulfated zirconia was much more active than conventional sulfated zirconia for n-butane isomerization.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of thermally stable mesostructured sulfated zirconia by a novel sulfate-assisted alcohothermal route

Cao

Wang

et al. 2005

Catal Lett

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“…shown that sulfated zirconia supported on MCM-41 shows an increased surface area, generating a good catalyst for cumene cracking, [11] isomerization of n-butane [12] or n-pentane, [13] and veratrole acylation [14]. β-Aminoalcohols are present in several biologically active natural and synthetic products; unnatural amino acids, chiral auxiliaries, as chiral catalysts in asymmetric synthesis [15], and their existence is fundamental because of their biological and chemical reactivity.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Regioselective Synthesis of β-Aminoalcohols under Solventless Conditions Catalyzed by Sulfated Zirconia and SZ/MCM-41

Negrón‐Silva¹,

Hernández-Reyes²,

Ángeles-Beltrán³

et al. 2007

Molecules

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Sulfated zirconia and SZ/MCM-41 were used as catalysts for the synthesis of β-aminoalcohols via epoxide aminolysis. Sulfated zirconia was prepared by sol-gel and SZ/MCM-41 was obtained by impregnation. Solid catalysts were characterized by XRD, SEM-EDS, UV-Vis, FT-IR pyridine desorption and Nitrogen physisorption. Both acid materials were useful as catalysts, even when they were recycled several times. The β-aminoalcohols were characterized by FT-IR, 1 H-and 13 C-NMR and GC-MS.

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“…High surface area is available by supporting SZ into the pores of mesoporous silica [10][11][12][13][14][15][16], such as MCM-41, SBA-15 and HMS, but the resulting materials show low catalytic activity for alkane isomerization [10,11], if the activity is expressed as conversion under the same catalyst weight. The possible reason is due to a decrease in acid strength.…”

Section: Introductionmentioning

confidence: 99%

Catalytic activities and properties of mesoporous sulfated Al2O3–ZrO2

et al. 2007

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Mesoporous sulfated Al 2 O 3 -ZrO 2 (MSAZ) catalysts with large surface areas and pore volumes after calcination at high temperature (650°C) and with higher Al 2 O 3 content than 20wt% were successfully prepared from a template of block copolymer (P84). The MSAZ catalysts were characterized by X-ray diffraction (XRD), N 2 adsorption, transmission electron microscopy (TEM), 27 Al magic-angle spinning nuclear magnetic resonance (MAS NMR), thermogravimetric analysis (TG-DTG), temperature-programmed desorption of ammonia (NH 3 -TPD) and infrared spectra (IR) of adsorbed pyridine. It is shown that the resulting mesostructured sulfated Al 2 O 3 -ZrO 2 samples have a well-developed textural mesoporosity. The number of acid sites present on MSAZ catalysts is higher than that on conventional sulfated zirconia, and the former catalysts are more active than the latter one for various acid-catalyzed reactions.

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Sulfated zirconia catalyst supported on MCM-41 mesoporous molecular sieve

Cited by 84 publications

References 34 publications

Synthesis and characterization of thermally stable mesostructured sulfated zirconia by a novel sulfate-assisted alcohothermal route

Synthesis and characterization of thermally stable mesostructured sulfated zirconia by a novel sulfate-assisted alcohothermal route

Comparative Study of Regioselective Synthesis of β-Aminoalcohols under Solventless Conditions Catalyzed by Sulfated Zirconia and SZ/MCM-41

Catalytic activities and properties of mesoporous sulfated Al2O3–ZrO2

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