Results 81 to 90 of about 19,084 (216)

First principles calculation of vibrational Raman spectra in large systems: signature of small rings in crystalline SiO2

open access: yes, 2002
We present an approach for the efficient calculation of vibrational Raman intensities in periodic systems within density functional theory. The Raman intensities are computed from the second order derivative of the electronic density matrix with respect ...
Francesco Mauri   +11 more
core   +1 more source

Synthesis of titanium-containing ZSM-48 [PDF]

open access: yes, 1992
Titanium-containing ZSM-48 is synthesized with silicon to titanium ratios of 26 or larger; changes in unit cell volume and IR data show that titanium is incorporated into framework ...
Davis, Mark E.   +2 more
core   +1 more source

Synergistic effects of Ni and CeO2 on ZSM-5 for enhancement of CO2 methanation at low temperatures

open access: yesSustainable Chemistry for Climate Action
Methanation offers a potential option for converting CO2 to green synthetic fuels, providing a solution for reducing carbon emissions. Nickel-based catalysts, promoted with CeO2 and supported on zeolite ZSM-5, were synthesized for CO2 methanation using ...
Nguyen Xuan Hong Quan   +7 more
doaj   +1 more source

Characterization of Ghanaian clays as raw materials for the synthesis of ZSM-5 zeolite

open access: yesScientific African
Clay minerals are inexpensive and widely available starting materials for the synthesis of zeolites, such as ZSM-5. In this work, clay samples were collected from Anfoega, Mfensi, Teleku-Bokazo, and Tetebu clay reserves in Ghana and used as sources of ...
Benjamin K. Kokloku   +4 more
doaj   +1 more source

Zeolite-​encapsulated 2-​(o-​aminophenyl)​benzimidazole complexes: synthesis, characterization and catalytic activity [PDF]

open access: yes, 2011
Cobalt(II)​, copper(II) and zinc(II) complexes of 2-​(o-​aminophenyl)​benzimidazole (AmPhBzlH) encapsulated in the super cages of zeolite-​Y and ZSM-​5 were synthesized and characterized by spectroscopic studies (IR, UV​/visible, EPR)​, elemental ...
Mahendra, K.N.   +2 more
core   +2 more sources

Photo-Catalytic Activity of ZnO Supported on H-ZSM-5 Zeolite to Reduce Cr(VI) from Aqueous Solutions [PDF]

open access: yes, 2016
Aims: The application of photocatalytic processes to remove heavy metals in aqueous solutions and industrial wastewater are regarded as extremely effective, clean and without producing waste methods.
Dehghani, R.   +4 more
core  

Hydrocarbon detection with metal oxide semiconducting gas sensors modified by overlayer or admixture of zeolites Na-A, H-Y and H-ZSM-5 [PDF]

open access: yes, 2017
A control thick-film SnO2 gas sensor was modified with zeolites holding LTA, FAU and MFI frameworks using two different approaches to integrate them into the gas-sensing interface. The objective was to prompt selectivity and sensitivity enhancements that
Hailes, SMV, Hernandez, PT, Parkin, IP
core   +1 more source

Synthesis of Dimethyl Terephthalate from Terephthalic Acid Esterification over the Zeolite Catalysts

open access: yesInorganics
The esterification of terephthalic acid (PTA) with methanol to dimethyl terephthalate (DMT) was investigated using commercially available zeolite catalysts as the eco-friendly solid acids. Six typical zeolites (ZSM-5-25, ZSM-5-50, ZSM-5-100, ZSM-35, MOR,
Ningyu Jia   +4 more
doaj   +1 more source

CuH-ZSM-5 as Hydrocarbon Trap under Cold Start Conditions [PDF]

open access: yes, 2013
Cold start tests are carried out to evaluate the performance of copper-exchanged zeolites as hydrocarbon traps under simulated gasoline car exhaust gases, paying special attention to the role of copper in the performance of these zeolites.
Cazorla-Amorós, Diego   +5 more
core   +2 more sources

Photo-Catalytic Activity of ZnO Supported on H-ZSM-5 Zeolite to Reduce Cr(VI) from Aqueous Solutions [PDF]

open access: yesInternational Archives of Health Sciences, 2015
Aims The application of photocatalytic processes to remove heavy metals in aqueous solutions and industrial wastewater are regarded as extremely effective, clean and without producing waste methods.
Haghighi M. MSc,   +4 more
doaj  

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