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Selective Catalytic Reduction of NOx on Cr-Mn Mixed Oxide at Low Temperature CHEN Zhihang 1,2,a, LI Xuehui 2, Cen Chaoping 1, GAO Xiang 2, WANG Lefu 2 1.
Introduction Selective catalytic reduction [1,2], plasma catalysis[4,5], catalytic decomposition[4] and so on could be used for elimination of nitrogen oxides.
Intensity data were collected over a 2θ range of 5°-85°.
The XRD phases were identified by comparison with the reference data from International Center for Diffraction Data (ICDD) files.
The performance of pure CrOx, MnOx, and Cr(0.5)-MnOx mixed oxide catalysts prepared by the citric acid, the co-precipitation and the solid state reaction method for selective catalytic reduction of NOx with NH3 is shown in Fig. 1.

Data for CDM projects were found in the database of the United Nations Framework Convention on Climate Change (UNFCCC), and the projects used were obtained from the National Agency of Electric Energy and a geo-referenced information system of the power sector.
Installed capacity, capacity factor, and reservoir area were data of interest, found in thegeo-referenced information system of the ANEEL (SIGEL) [5].
These data were for 1401 enterprises located on the Brazilian interconnected power system.
The average emission factor (Ef) of the interconnected system was calculated according to the data available at the MCT [6] website.
These data take into account the methodologies ACM0002 and AMS ID from the UNFCCC.

In order to quickly obtain valuable information from these data, there is an increased likelihood that an intermediate, additional step which is data reduction (dimension reduction) should be performed prior to data analysis.
On account of two reasons mentioned above, it is necessary to develop an efficient approach for solving the problem of data reduction and an approach suitable for limited prior knowledge to construct membership functions of fuzzy sets.
The manufacturing process dataset Data no.
Holmes: IEEE Trans. on Knowledge and Data Engin.
Pawlak: Rough Sets - theoretical aspects of reasoning about data (Kluwer Academic Publishers, 1991)

Salikhovb South Ural State University (National Research University), Chelyabinsk, Russia abakytsuleimen@mail.ru, bsalikhovsp@susu.ru Keywords: ayat deposit, oolitic iron ore, phosphorus reduction, reduction temperature.
The effect of reduction of temperature was studied, by CO gas at 800, 900, 1000, 1050 °C, for 3hours reduction time.
At lower temperatures iron had lower degree of reduction, and phosphorus was not reduced at all.
According to the data provided in Table 3 for the analysis shown in Fig. 2 it can be observed that in CO gas atmosphere at temperature of 800 ° C and for 3 hours holding time there was no reduction of iron to metal in the oolite structure (there was no bright white metal phase found).
Only after reduction the preoxidized ore acquired magnetic properties.

Up to now, interfacial instabilities in aluminium reduction cells have attracted much attention since they might cause short circuit and influence greatly on the temperature distribution and reduction of energy consumption.
Besides, a NI data acquisition board PCI6284 is applied to collect raw signals from the sensors, which has 32 analog input channels, a resolution of 18 bit and a sampling rate of 500kSps, this enables a sampling rate of up to 15 kSps per channel if 32 analog input channels are utilized simultaneously.
An analysis of the hydrodynamics of aluminium reduction cells.
An Energy Analysis of Unstable, Aluminium Reduction Cells, European Journal of Mechanics, B/Fluids, vol. 13(1994), pp. 15-32
Interfacial instability due to MHD mode coupling in aluminium reduction cells.

The middle zone – is the reduction one.
Content, % Reduction Degree, % Notes Fetotal FeO S CaO SiO2 MgO Femet. 1 56,3 38,6 0,05 0,5 2,5 17,5 – 18 Whole lump average sample 2 60,2 48,2 N/A 6,0 3,6 22,9 26,5 58,2 Upper layer 61,3 64,0 0,004 5,2 3,7 22,6 24,7 60,0 Intermediate layer 58,3 55,1 0,003 5,2 3,7 22,6 17,7 51,0 Lump core 3 64,5 51,5 0,005 0,5 0,2 24,7 24,8 58,5 Whole lump average sample It follows from data of Table 3 that decomposition in argon atmosphere results in FeO and Fe3O4 oxide mixture with the composition of .
The obtained results agree completely with the work data [2].
As is seen from data of Table 3, ferrous oxide content increases and the metallic iron decreases from the sample surface to the center, what is indicative of significant diffusion resistance in the ore sample with the size of 45 – 50 mm.
Experiments were carried out to obtain data on the ore firing in the neutral atmosphere (argon) on the samples with the dimensions of 12 – 15 mm.

Reduction ability of carbon and silicon as well as reduction characteristics of Nb2O5 and Fe(NbO3) were compared.
As related work was concentrated on technological conditions, while reduction characteristics of Nb compounds in steel were the fundamental research to be studied, therefore, the research on this paper was carried out, so as to provide data for the technology of direct alloying Nb.
I/a.u 2θ/o Fig.2 XRD patterns of synthetic product Results of reduction characteristics of Nb compounds In CaO-SiO2-Al2O3 slag system, reduction compositions of Nb compounds in Fe-C and Fe-Si melt are shown in Table1 and Table2 respectively, equilibrium ω[Nb] has no obvious difference, while the equilibrium time of reduction of Fe(NbO3)2 is longer than that of Nb2O5; Meanwhile, the reduction capability of silicon (reduction rate 92%) is more powerful than that of carbon (reduction rate 30%).
Therefore, reduction compositions of Fe(NbO3)2 and Nb2O5 have no obvious difference, but the equilibrium time of reduction of Fe(NbO3)2 is longer than that of Nb2O5.
Although reduction equilibrium composition of Nb2O5 is the same as that of Fe(NbO3)2, reduction time of Fe(NbO3)2 is longer than that of Nb2O5.

On the base of measuring data, the noise resource is analyzed and the character of the noise resource is discussed.
Perfect effects of noise reduction can be obtained in the working project.
Table 1 is the measurement of sound data.
From the test data could be drawn, cooling tower near point1 to point10 average noise reached 72.8dB ( A ), and with the increase of distance, the energy of noise attenuation is slow.
Therefore decided to install muffler at the fan exit so as to achieve the purpose of the noise reduction.

Consequently, according to the XRD data analysis, prolonging reduction time after 60 minutes is useless.
XRD Data Analysis of Saprolite Reduction Process using Anthracite Charcoal in 1000°C.
XRD Data Analysis of Saprolite Reduction Process using Coconut Shell Charcoal in 1000°C.
This pattern is supporting the XRD data analysis that the process will be significantly inactive after 60 minutes reduction.
This also corresponds with XRD data mentioned before.

The gas space velocity in the experiment simulated atmospheric data.
“Zeolite-based materials for the selective catalytic reduction of NOx with hydrocarbons.”
"Catalytic reduction of nitric oxide by methane over CaO catalyst."
"Plasma-catalytic reduction of NO with C2H4 in the presence of excess oxygen."
Catalyst oxidation and reduction, Ind Eng Chem Prod Res Dev 20 (1981), pp. 451–457.