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2004 Progress Report: Development of Nanocrystalline Zeolite Materials as Environmental Catalysts: From Environmentally Benign Synthesis to Emission Abatement
EPA Grant Number: R829600Title: Development of Nanocrystalline Zeolite Materials as Environmental Catalysts: From Environmentally Benign Synthesis to Emission Abatement
Investigators: Larsen, Sarah C. , Grassian, Vicki H.
Institution: University of Iowa
EPA Project Officer: Lasat, Mitch
Project Period: January 1, 2002 through December 31, 2004
Project Period Covered by this Report: January 1, 2004 through December 31, 2005
Project Amount: $350,000
RFA: Exploratory Research: Nanotechnology (2001)
Research Category: Nanotechnology
Description:
Objective:This research project involves the development of nanometer-sized zeolites and zeolite nanostructures as environmental catalysts. Zeolites, which are widely used in applications in separations and catalysis, are aluminosilicate molecular sieves with pores of molecular dimensions. The crystal size of zeolites formed during conventional synthesis range in size from 1,000 to 10,000 nm. For some applications, however, it would be advantageous to employ much smaller nanometer-sized zeolite crystals in the range of 10-100 nm. Specific advantages to be gained by using zeolite nanostructures include facile adsorption and desorption, the ability to form dense films to facilitate separation applications, and optical transparency. The two main objectives of this research projects are to: synthesize and characterize nanocrystalline zeolites and to use the nanocrystalline zeolites as environmental catalysts.
Progress Summary:The major accomplishments of the work during Year 3 of this research project are:
- synthesized nanocrystalline NaY with particle sizes of 20-50 nm;
- developed a more efficient synthesis method for the preparation of silicalite and NaY that involves reusing the synthesis solution for subsequent batches
- characterized the size-dependent properties of nanocrystalline NaY by powder x-ray diffraction, scanning electron microscopy, nitrogen adsorption isotherms, and solid state nuclear magnetic resonance;
- studied the adsorption and desorption of a representative volatile organic compound, such as toluene, on nanocrystalline NaY;
- prepared hollow zeolite structures using nanocrystalline silicalite as a building block;
- functionalized the external surface of nanocrystalline ZSM-5 to increase hydrophobicity;
- utilized Fourier transform infrared spectroscopy (FTIR) to investigate the use of nanocrystalline NaY for the selective catalytic reduction of NOx with propylene;
- and utilized FTIR to investigate the use of nanocrystalline NaY for the selective catalytic reduction of NOx with urea.
During Year 4 of the project, we will determine environmental applications for nanocrystalline zeolites. The studies of applications involving environmental catalysis, specifically NOx selective catalytic reduction on nanocrystalline NaY will be completed during this time. A study of the potential application of the iron loaded zeolite structures for the visible light photoreduction of Cr(VI) in water will be conducted. The self-assembly of nanocrystalline silicalite also will be investigated.
Journal Articles on this Report: 8 Displayed | Download in RIS Format
| Other project views: | All 45 publications | 15 publications in selected types | All 11 journal articles |
| Type | Citation | ||
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Li GH, Larsen SC, Grassian VH. Catalytic reduction of NO2 in nanocrystalline NaY zeolite. Journal of Molecular Catalysis A-Chemical 2005;227(1-2):25-35. |
R829600 (2004) R829600 (Final) |
not available |
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Li GH, Larsen SC, Grassian VH. An FT-IR study of NO2 reduction in nanocrystalline NaY zeolite: effect of zeolite crystal size and adsorbed water. Catalysis Letters 2005;103(1-2):23-32 |
R829600 (2004) R829600 (Final) |
not available |
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Song WG, Li GH, Grassian VH, Larsen SC. Development of improved materials for environmental applications: Nanocrystalline NaY zeolites. Environmental Science & Technology 2005;39(5):1214-1220. |
R829600 (2004) R829600 (Final) |
not available |
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Song W, Kanthasamy R, Grassian VH, Larsen SC. Hexagonal, hollow, aluminium-containing ZSM-5 tubes prepared from mesoporous silica templates. Chemical Communications 2004;(17):1920-1921 |
R829600 (2004) R829600 (Final) |
not available |
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Song W, Justice RE, Jones CA, Grassian VH. Size-dependent properties of nanocrystalline silicalite synthesized with systematically varied crystal sizes. Langmuir 2004;20(11):4696-4702. |
R829600 (2004) R829600 (Final) |
not available |
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Song W, Justice RE, Jones CA, Grassian VH, Larsen SC. Synthesis, characterization, and adsorption properties of nanocrystalline ZSM-5. Langmuir 2004;20(19):8301-8306 |
R829600 (2004) R829600 (Final) |
not available |
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Song W, Grassian VH, Larsen SC. High yield method for nanocrystalline zeolite synthesis. Chemical Communications 2005;(23):2951-2953. |
R829600 (2004) R829600 (Final) |
not available |
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Song W, Woodworth JF, Grassian VH, Larsen SC. Microscopic and macroscopic characterization of organosilane-functionalized nanocrystalline NaZSM-5. Langmuir 2005;21(15):7009-7014. |
R829600 (2004) R829600 (Final) |
not available |
pollution prevention, clean technologies, pollution prevention, green chemistry, nanotechnology, waste minimization, remediation, VOC, nitrogen oxides, solvents, oxidation,
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Toxics, Sustainable Industry/Business, Scientific Discipline, Waste, Remediation, Chemical Engineering, HAPS, Environmental Engineering, cleaner production/pollution prevention, Environmental Chemistry, Chemistry and Materials Science, VOCs, clean technology, nanotechnology, nitrogen oxide, green chemistry, solvents, Nox, waste minimization, environmentally benign synthesis, zeolites, Nitrogen Oxides, nanomaterials, environmental catalysts, emission abatement, pollution prevention
Relevant Websites:
http://www.uiowa.edu/~chemdept/faculty/larsen/index.html 
http://www.uiowa.edu/~chemdept/faculty/grassian/index.html
Progress and Final Reports:
2002 Progress Report
Original Abstract
Final Report