Methanol to clean gasoline over nanostructured CuO–ZnO/HZSM-5 catalyst: Influence of conventional and ultrasound assisted co-impregnation synthesis on catalytic properties and performance

Sadeghi, Sedigheh; Haghighi, Mohammad; Estifaee, Pooya

doi:10.1016/j.jngse.2015.03.045

Cited by 49 publications

(16 citation statements)

References 38 publications

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“…Another recorded band at 1620 cm –1 together with the other broad band at 3450 cm –1 was assigned to physically absorbed water and the interconnecting OH groups, respectively, akin to the other reports. 20,46,47…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Production of Benzene-Free Aromatics from Methanol over Low-Si/Al-Ratio Alkali-Modified Fe/Zn/HZSM-5

Ghanbari

Zangeneh

Rizi³

et al. 2018

ACS Omega

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Herein, the methanol conversion to aromatic hydrocarbons was studied over a new family of mesoporous low-silica HZSM-5 (Si/Al = 11) catalysts in a fixed-bed tubular reactor under ambient pressure at 375 °C, feeding with weight hourly space velocity of 2 h –1 . The catalysts were prepared in the absence and presence of Zn and Fe in both alkaline and neutral aqueous solutions, characterized by using X-ray diffraction, X-ray fluorescence, temperature programmed desorption of ammonia, N 2 adsorption/desorption, thermogravimetric analysis, Fourier-transform infrared, transmission electron microscopy (TEM), field emission scanning electron microscopy and FE-SEM/energy dispersive X-ray spectroscopy techniques. The [0.2Fe,0.3Zn]-alk-HZSM-5 catalyst exhibited novel selectivity for aromatics (>86 wt %), specifically for m and p -xylenes (44.7 wt %) alongside 0.1 wt % for benzene.

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Section: Resultsmentioning

confidence: 99%

Highly Efficient Production of Benzene-Free Aromatics from Methanol over Low-Si/Al-Ratio Alkali-Modified Fe/Zn/HZSM-5

Ghanbari

Zangeneh

Rizi³

et al. 2018

ACS Omega

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“…Whereas in the case of the impregnation method the HZSM-5 zeolite pore structure might be easily damaged. 89,90 However, by treatment with the ALD technique, some Pt nanoparticles are deposited in the microporous channels of HZSM-5. The microporous structure and acidic sites of HZSM-5 remain stable, which indicates that ALD is an important technique for protection of the zeolite structure in catalyst preparation.…”

Section: Synthesis Of Vamentioning

confidence: 99%

Recent advances in biomass-derived platform chemicals to valeric acid synthesis

et al. 2022

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“…Regarding the FTIR patterns, the spectrum of all samples after metals incorporation is similar to the ZSM-5/11 and demonstrate common characteristic absorption bands at around 450, 550, 797, 1100 and 1225 cm -1 regions. 48 The peak at 450 cm -1 is related to the vibration of Al (or Si) T-O bond of AlO 4 and SiO 4 in a tetrahedral network. The band at 550 cm -1 is correlated with the presence of double five rings which are the characteristic structure of pentasil in MFI and MEL zeolite family.…”

Section: Bet Analysismentioning

confidence: 99%

Conversion of methanol to aromatics over ZSM-5/11 intergrowth Zeolites and bimetallic Zn-Cu-ZSM-5/11 and Ga-Ag-ZSM-5/11 catalysts prepared with direct synthesis method

2019

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Catalytic conversion of methanol to gasoline range hydrocarbons, especially aromatics was carried out in a fixed bed reactor over nano-crystal composite H-ZSM-5/11 zeolite synthesized by hydrothermal method. The metals of Zn, Cu, Ga and Ag as bimetallic Zn-Cu and Ga-Ag with different concentrations (3: 2, 5: 3) and (1:1, 3:2) respectively were selected for loading into the prepared zeolite catalysts. Direct synthesis method was used for incorporating metals. Prepared zeolites were characterized by XRD, SEM, TEM, N 2 adsorption-desorption, ICP-OES, NH 3-TPD and FT-IR. After incorporation of metal species into the zeolites framework, the particles crystalline size was reduced, the intercrystalline porosity was increased, causing the formation of new moderate acid sites. The catalytic results illustrated that the incorporation of metal species enhanced the activity and catalyst stability in MTA reaction. BTX yield in ZSM-5/11 reached up at 23.5% to 30.4% and 25.88% with Zn-Cu-ZSM-5/11(1) and Ga-Ag-ZSM-5/11(1), respectively whereas heavier aromatics production reduced. Also, the comparison of catalysts with different metals content showed that due to improvement in structure and properties, low metal content zeolites have better performance in converting methanol to aromatics.

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Methanol to clean gasoline over nanostructured CuO–ZnO/HZSM-5 catalyst: Influence of conventional and ultrasound assisted co-impregnation synthesis on catalytic properties and performance

Cited by 49 publications

References 38 publications

Highly Efficient Production of Benzene-Free Aromatics from Methanol over Low-Si/Al-Ratio Alkali-Modified Fe/Zn/HZSM-5

Highly Efficient Production of Benzene-Free Aromatics from Methanol over Low-Si/Al-Ratio Alkali-Modified Fe/Zn/HZSM-5

Recent advances in biomass-derived platform chemicals to valeric acid synthesis

Conversion of methanol to aromatics over ZSM-5/11 intergrowth Zeolites and bimetallic Zn-Cu-ZSM-5/11 and Ga-Ag-ZSM-5/11 catalysts prepared with direct synthesis method

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