scholarly journals Erratum: Toro, C. et al. On the Detection of Spectral Emissions of Iron Oxides in Combustion Experiments of Pyrite Concentrates. Sensors 2020, 20, 1284

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6141
Author(s):  
Carlos Toro ◽  
Sergio Torres ◽  
Víctor Parra ◽  
Rodrigo Fuentes ◽  
Rosario Castillo ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Spectral Emissions

The authors wish to make the following corrections to this paper [...]

scholarly journals On the Detection of Spectral Emissions of Iron Oxides in Combustion Experiments of Pyrite Concentrates

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1284 ◽  
Author(s):  
Carlos Toro ◽  
Sergio Torres ◽  
Víctor Parra ◽  
Rodrigo Fuentes ◽  
Rosario Castillo ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Spectral Resolution ◽  
Flame Temperature ◽  
Sulfide Mineral ◽  
High Spectral Resolution ◽  
Multivariate Curve Resolution ◽  
Mineral Particle ◽  
Non Linear ◽  
Detection Schemes ◽  
Spectral Emissions

In this paper, we report on the spectral detection of wustite, Fe(II) oxide (FeO), and magnetite, Fe(II, III) oxide (Fe3O4), molecular emissions during the combustion of pyrite (FeS2), in a laboratory-scale furnace operating at high temperatures. These species are typically generated by reactions occurring during the combustion (oxidation) of this iron sulfide mineral. Two detection schemes are addressed: the first consisting of measurements with a built-in developed spectrometer with a high sensitivity and a high spectral resolution. The second one consisting of spectra measured with a low spectral resolution and a low sensitivity commercial spectrometer, but enhanced and analyzed with post signal processing and multivariate data analysis such as principal component analysis (PCA) and a multivariate curve resolution—the alternating least squares method (MCR-ALS). A non-linear model is also proposed to reconstruct spectral signals measured during pyrite combustion. Different combustion conditions were studied to evaluate the capacity of the detection schemes to follow the spectral emissions of iron oxides. The results show a direct correlation between FeO and Fe3O4 spectral features intensity, and non-linear relations with key combustion variables such as flame temperature, and the combusted sulfide mineral particle size.

Selective oxidation of aniline into azoxybenzene catalyzed by Nb-peroxo@iron oxides at room temperature

2020 ◽  
Vol 44 (21) ◽  
pp. 8710-8717
Author(s):  
André L. D. Lima ◽  
Humberto V. Fajardo ◽  
André E. Nogueira ◽  
Márcio C. Pereira ◽  
Luiz C. A. Oliveira ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Selective Oxidation ◽  
Room Temperature ◽  
High Selectivity

Nb-peroxo@iron oxides show high selectivity and activity in aniline conversion to azoxybenzene.

Pilot Plant Data for Synthetic Iron Oxides

1952 ◽  
Vol 44 (3) ◽  
pp. 449-449
Author(s):  
C DeWitt ◽  
M Livingood ◽  
K Miller
Keyword(s):  
Iron Oxides ◽  
Pilot Plant ◽  
Plant Data

Effects of carbon and manganese impurities on cerium incorporation in iron oxides scales

1996 ◽  
Vol 93 ◽  
pp. 1509-1524 ◽  
Author(s):  
C Courty ◽  
H Buscail ◽  
JP Larpin
Keyword(s):  
Iron Oxides

Changes of Magnetic Characteristics of iron Oxides and Hydroxides in Aqueous Medium

2017 ◽  
Vol 39 (1) ◽  
pp. 46-52
Author(s):  
T. SAVCHENKO ◽  
◽  
A. GRECHANOVSKY ◽  
A. BRIK ◽  
N. DUDCHENKO
Keyword(s):  
Aqueous Medium ◽  
Iron Oxides ◽  
Magnetic Characteristics

IRON OXIDES FROM ELECTROFILTER ASH FOR WATER TREATMENT (ARSENIC REMOVAL)

2009 ◽  
Vol 8 (4) ◽  
pp. 895-900 ◽  
Author(s):  
Ionel Balcu ◽  
Adina Segneanu ◽  
Marius Mirica ◽  
Mirela Iorga ◽  
Catalin Badea ◽  
...  
Keyword(s):  
Water Treatment ◽  
Iron Oxides ◽  
Arsenic Removal

Oriented overgrowth of hematite on beta-alumina

1965 ◽  
Vol 34 (268) ◽  
pp. 416-422 ◽  
Author(s):  
E. R. Segnit
Keyword(s):  
Iron Oxides ◽  
Beta Alumina

SummaryAn alkali-alumina-silica slag from the interior of a kiln used for the firing of refractories was found to contain recrystallized mullite, corundum, and beta-alumina. Isolated areas of the slag were also rich in iron oxides; in these areas beta-alumina crystallized from the melt as hexagonal plates, and at a later stage small hexagonal plates of bematite grew on the 0001 face of the beta-alumina plates in a regular fashion.

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