Experiments on the selective non-catalytic reduction of nitric oxide /
Selective non-catalytic removal of nitric oxide (NO) using
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| Format: | Thesis Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=742163991&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | Selective non-catalytic removal of nitric oxide (NO) using powdered cyanuric acid (C3H3N303) and gaseous ammonia (NH3) in separate tests was studied for pressures up to 515 kPa. The experiments were conducted in an electrically heated laminar-flow, variable geometry quartz reactor using mixtures of various concentrations of N2, 02, NO, CO, H20 to simulate exhaust gas. A Fourier Transform Infrared (FTIR) spectrometer was used to detect and quantify the gaseous products of this process. The effects of mixing, preheating, and/or quenching rate were significant to the reduction processes. The Thermal DeNOx, process showed the formation of substantial N02 at high-pressure conditions. The cyanuric acid (CA) decomposition results showed tremendous sensitivity to temperature. The RAPRENOx, process, which involved CA decomposition at 825 K, had less than 10% of the initial fixed nitrogen species of the simulated combustion stream after mixing with the CA decomposition stream for reactor temperatures above 1300 K at a pressure of 515 kPa. The fixed nitrogen species included NO, N20, N02, HNCO, NH3 and HCN. The MULTNOx, process (new to this investigation), which involved CA decomposition at 950K, generally showed little sensitivity to variations in 02, CO, and pressure, but HNCO appeared to be formed during the reduction reaction for reaction temperatures below 1125 K. The results of this investigation at elevated pressure have not previously been available, and should allow for modifications to existing kinetic models to improve the understanding of these various reduction processes. |
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| Item Description: | Vita. "Major Subject: Mechanical Engineering". |
| Physical Description: | xxi, 256 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references. |