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Abstract

The chemical compound NOx is one of the biggest sources of air pollution, and presently Selective Catalytic Reduction (SCR) is the most frequently used method to dispose of NOx. A proportion of NH₃ as a reducer is injected into the system and mixed with the NOx waste gas so as to be treated thoroughly. With sufficient O₂, NOx is reduced to innocuous N₂ and H₂O by the catalytic reduction of the catalyst. The purpose of this study is to develop a monitoring system for blending the mixing ratio and concentration of NO automatically and for SCR catalyst De-NOx performance test analysis. This monitoring system enables the user to set various control parameters and instrument parameters, executes user calibration operations (e.g. zero calibration, full scale calibration and low concentration calibration), and tests the De-NOx performance of the plate type catalyst. In the catalyst De-NOx performance testing process, the system prepares the NO mixing ratio and concentration automatically according to the blending concentration and temperature control curves set by the user and then implements the catalyst bed multi-stage temperature control, so as to complete NO or NH₃ concentration detection and automatic data logging as the base of De-NOx performance test analysis.

Keywords

Nitrogen oxides selective catalytic reduction De-NOx performance automatic control system

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References

Bosch and

Janssen , DeNOx catalyst review, Catalyst Today 2 (1988), 369–532.

Boyano ,

M.J.

Lazaro ,

Cristiani ,

F.J.

Maldonado ,

Forzatti and

Moliner , A comparative study of V2O5/AC and V2O5/Al2O3 catalysts for the selective catalytic reduction of NO by NH3, Chemical Engineering Journal 149 (2009), 173–182.

Chen ,

Li ,

Ge and

Zhu , Enhanced activity of tungsten modified CeO2 /TiO2 for selective catalytic reduction of NOx with ammonia, Catalysis Today 153 (2010), 77–83.

P.R.

Ettireddy ,

Mamedov ,

Boolchand and

P.G.

Smirniotis , Surface characterization studies of TiO2 supported manganese oxide catalysts for low temperature SCR of NO with NH3, Applied Catalysis B: Environmental 76 (2007), 123–134.

Jin ,

Liu ,

Wu ,

Wang and

Gu , Low-temperature selective catalytic reduction of NO with NH3 over Mn-Ce oxides supported on TiO2 and Al2O3: A comparative study, Chemosphere 78 (2010), 1160–1166.

Liu ,

He ,

Zhang ,

Shan and

Shi , Mechanism of selective catalytic reduction of NOx with NH3 over environmental-friendly iron titanate catalyst, Catalysis Today 175 (2011), 18–25.

Jiang ,

Liu and

Wu , Low-temperature selective catalytic reduction of NO on MnOx/TiO2 prepared by different methods, Journal of Hazardous Materials 162 (2009), 1249–1254.

Jin ,

Liu ,

Wu ,

Wang and

Gu , Relationship between SO2 poisoning effects and reaction temperature for selective catalytic reduction of NO over Mn-Ce/ TiO2 catalyst, Catalysis Today 153 (2010), 84–89.

M.S.

Hu and

L.H.

Chen , Control system for dichlorophenol and volatile organic compound catalytic reduction performance analysis, Sensors and Materials 29(11) (2017), 1555–1568.

10.

USB-4711A User Manual, 150 KS/s, 12-bit Multifunction USB Data Acquisition Module, Advantech.

11.

PCI-1724U User Manual, 14-bit, 32-ch, Isolated Analog Output Card, Advantech.

12.

B.C.

Kuo , Automatic Control Systems, Holt, Rinehart and Winston, Inc, New York, 2003.

13.

S.Z.

Xie , Graphical Programming Language-LabVIEW, Chuan Hwa Book Co., LTD., 2013.

14.

K.H.

Ang ,

Chong and

Li , PID control system analysis, design, and technology, IEEE Trans Control Systems Technology 13(4) (2005), 559–576.

15.

Li ,

K.H.

Ang and

G.C.Y.

Chong , Patents, software, and hardware for PID control: An overview and analysis of the current art, Control Systems, IEEE 26(1), 42–54.

The control system for plate type catalytic reduction performance analysis with automatic blending

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