1995 Fiscal Year Final Research Report Summary
Rapid Determination of Different Nitrogen Oxides in the Outlet Gas from the Iron Ore Sintering Process by Means of Infra-red Spectroscopy
| Project/Area Number |
06555220
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Metal making engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
KASAI Eiki Institute for Advanced Materials Processing, Tohoku University, Associate Professor, 素材工学研究所, 助教授 (50134044)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIKAWA Osamu Res.& Develop.Dept., Chromatographic & Spectrophotometric Instruments Div, Shima, 第1分析事業部・技術部, 課長
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| Project Period (FY) |
1994 – 1995
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| Keywords | Infra-red Spectroscopy / Nitrogen Oxides / Micro-determination / Combustion / Coke / Iron Ore Sintering / Spectle Analysis |
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| Research Abstract |
A new method quantitatively determining a small amount of nitrogen oxide species and other gases take a part in the formation of nitrogen oxides were developed. This method can be applicable to the conditions, where the concentrations of gaseous species are quite low and they change rapidly. The principle of the measurement is an application of Fourier Transform Infra-red Spectroscopy (FTIR). The determination limit and response for 90% are 0.5ppm, respectively. It becomes possible due to rapid elimination of water vapor which gives wide range of infra-red absorption bands by the multi-pipe made of molecule-exchange film and due to limitation of measured absorption peaks of objective gases which are not influenced by residual water vapor, carbon-dioxide, methene and so forth.
The major feature of the developed method is as follows :
1) Software for determination of gaseous concentration : Optimum algorithm for high-speed calculation and record of spectra data considering proper range of absorption corresponding to objective gases.
2) Gas cell with a small volume and optical length : Gas cell having inner volume 100cc and optical path 10m was applied. Gas flow condition in the gas cell was optimized by the mathematical simulation.
3) Application to modeled and combustion gases : Calibration curve was prepared using various standard gas mixtured and then it was applied to actual combustion gases. The results gives the validity of the method.
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