Synthesis and characterization of mesoporous ZrMCM-48 molecular sieves with good thermal and hydrothermal stability

Jiang, Tingshun; Wu, Denghao; Song, Jun; Zhou, Xinping; Zhao, Qian; Ji, Mingyang; Yin, Hengbo

doi:10.1016/j.powtec.2010.11.030

Cited by 23 publications

(10 citation statements)

References 31 publications

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“…The intensity of the 960 cm −1 band was degenerated to the shoulder of the 1080 cm −1 band with the modification of MTS-CNSL with MgO, which points out that the surface silanols groups around 960 cm −1 interrelated with the oxide species and contributed to forming the Si-O-Mg in the process of modification. Usually the band 960 cm −1 is taken as evidence for the incorporation of metal atoms in the silica framework of mesoporous material [20]. This agrees with the FT-IR results, whereby around 960 cm −1 no Si-OH bending bands are observed on the mesoporous catalysts spectrums.…”

Section: Resultssupporting

confidence: 81%

Solvent-Free MgO-Functionalized Mesoporous Catalysts for Jatropha Oil Transesterification

Andrew

Katima

Lee

et al. 2015

Journal of Nanotechnology

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A convenient solvent-free technique was employed in the functionalization of Micelle-Templated Silica using Cashew Nut Shell Liquid (MTS-CNSL) as a template and magnesium nitrate as a precursor salt. Magnesium oxide species was highly dispersed in MTS-CNSL by manually grinding the precursor salt and the as-synthesized mesoporous silica followed by calcination. The resultant modified mesoporous silicas MgO/MTS-CNSL were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR, N2adsorption/desorption), and scanning electron microscopy/energy dispersive X-ray (SEM/EDX). MgO/MTS-CNSL (30) having small specific surface area of 16.7 m2/g and larger pore volume of 0.02 cm3/g, presented higher activity of 81.45% for jatropha oil under optimized conditions (200°C, 4 h, 36 : 1 methanol : oil ratio, 500 rpm, and 6% wt of catalyst). This method of catalyst development has an advantage of being highly energy- and time-efficient.

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Section: Resultssupporting

confidence: 81%

Solvent-Free MgO-Functionalized Mesoporous Catalysts for Jatropha Oil Transesterification

Andrew

Katima

Lee

et al. 2015

Journal of Nanotechnology

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“…They illustrate the shape and behavior of the N 2 adsorption isotherms for the mesoporous materials. All the isotherms belonged to IV type in the IUPAC classification [19] in all samples. The isotherms were wide, without any clear plateau, and a certain hysteresis slope was observed at intermediate and high relative pressures in all four catalysts, which is indicative of the presence of large mesopores.…”

Section: Characteristics Of the Four Experimental Catalystsmentioning

confidence: 89%

Hydrogen-rich gas production from ethanol steam-reforming reaction using NiZr-loaded MCM-48 catalysts at mild temperature

Lee

Kim

Choi

et al. 2013

Int. J. Energy Res.

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SUMMARY The rich‐hydrogen generation from ethanol steam reforming over NiZr, which is used as an anode material in solid oxide fuel cells, ‐loaded MCM‐48 (NiZr/MCM‐48) catalyst was investigated in this study. We used an impregnation approach to synthesize an MCM‐48 (70.0 wt‐%) support loaded with bimetallic NiZr (30.0‐wt%, Ni:Zr atomic ratio = 4:6, 5:5, and 6:4), and the prepared catalysts were applied to the steam‐reforming reactions of ethanol. These three bimetallic NiZr/MCM‐48 catalysts exhibited significantly higher reforming reactivity than the mono‐metal, Ni‐loaded MCM‐48 (Ni/MCM‐48) catalyst. The hydrogen production was started from 350°C over the three NiZr/MCM‐48 catalysts, compared to above 550°C over the Ni/MCM‐48 catalyst. The catalytic performance was affected by the Zr content. The H2 production and ethanol conversion were maximized at 85% and 95%, respectively, over Ni4Zr6/MCM‐48 at 750°C for 1 h at CH3CH2OH:H2O = 1:1 and a gas hourly space velocity of 4000 h‐1. This high performance was maintained for up to 60 h. Copyright © 2013 John Wiley & Sons, Ltd.

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“…A detailed synthesis procedure for Zr incorporated MCM-48 mesoporous molecular sieve has been reported in our previous publication (Jiang et al, 2011). The typical composition for the synthesis of Zr incorporated MCM-48 was: 1TEOS: x Zr: 0.65CTAB: 0.5NaOH: 0.1NaF: 62H 2 O (x = 0.02 and 0.04, respectively).…”

Section: Synthesis Of Zr Incorporated Mcm-48 Mesoprous Molecular Sievesmentioning

confidence: 99%

Preparation of mesoporous zirconium incorporated MCM-48 solid acid catalyst and its catalytic activity for alkylation of phenol with tert-butyl alcohol

Jiang

Cheng

et al. 2015

Journal of the Association of Arab Universities for Basic and A

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2015) Preparation of mesoporous zirconium incorporated MCM-48 solid acid catalyst and its catalytic activity for alkylation of phenol with tert-butyl alcohol, Abstract Zirconium incorporated mesoporous MCM-48 solid acid catalysts with the different Si/Zr molar ratios were prepared by modification with H 2 SO 4 and NH 4 NO 3 solution, respectively. Their physicochemical properties were characterized by XRD, TEM, NH 3 -TPD and N 2 physical adsorption. The catalytic performances of these catalysts were investigated by using the alkylation reaction of phenol and tert-butyl alcohol as the target reaction. The results reveal that the SO 4 2À / ZrMCM-48 and H-ZrMCM-48 catalysts still maintained the cubic mesporous structure of MCM-48, but the mesoporous ordering decreased. Under comparable conditions, the catalytic activity of SO 4 2À /ZrMCM-48(25) solid acid catalyst is the highest among all catalysts. The lower reaction temperature is favorable for formation of the 2,4-DTBP and the 4-TBP is easily formed at the higher reaction temperature.ª 2014 Production and hosting by Elsevier B.V. on behalf of University of Bahrain.

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Synthesis and characterization of mesoporous ZrMCM-48 molecular sieves with good thermal and hydrothermal stability

Cited by 23 publications

References 31 publications

Solvent-Free MgO-Functionalized Mesoporous Catalysts for Jatropha Oil Transesterification

Solvent-Free MgO-Functionalized Mesoporous Catalysts for Jatropha Oil Transesterification

Hydrogen-rich gas production from ethanol steam-reforming reaction using NiZr-loaded MCM-48 catalysts at mild temperature

Preparation of mesoporous zirconium incorporated MCM-48 solid acid catalyst and its catalytic activity for alkylation of phenol with tert-butyl alcohol

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