SYNTHESIS, ACTIVITY AND THERMAL STABILITY OF GOLD NANOPARTICLE ON MODIFIED NH4-Y TYPE ZEOLITE FOR COOXIDATION
Loading...
Files
Date
Advisor
Journal Title
Journal ISSN
Volume Title
Publisher
Iranian Association of Environmental Health (IAEH)
Abstract
Description
Gold nanoparticle is the active catalyst for CO oxidation at low
temperature. This feature of gold base catalysts is suitable to
overcome the problem of cold-start problem of automobile exhaust TWC
converters. In this study gold nanoparticle were deposited on modified
NH4-Y type zeolite. The activity of synthesized catalyst was measured
in a fixed-bed quartz-tubular reactor (7mm i.d.) under atmospheric
pressure. In order to investigate the catalytic activities toward CO
oxidation reaction, 31mL/min of air and 0.155mL/min of carbon monoxide
were mixed and then passed through the reactor. It was found that
activity of Au/Y catalyst was 100% at 20°C. The thermal stability
of Au/Y catalyst was measured at 400°C for 4h. The activity of the
catalyst was decreased to 65% at 20°C after thermal stability
test. Results of Energy Dispersive Analysis by X-rays before and after
thermal stability have showed that Au content of these samples were
3.89% and 1.76, respectively. It was found that the amount of Au
content decreased after thermal stability process. Fourier Transform
Infrared (FT-IR) spectra showed no changes in framework structure of
zeolite during thermal stabilization process of the catalyst.
Keywords
Gold nanoparticle, NH4Y-type zeolite, CO oxidation, Catalyst, Thermal
stabilization
Citation
ISSN
Related Outputs
Items in TSpace are protected by copyright, with all rights reserved, unless otherwise indicated.