Iron oxide supported sulfated TiO2 nanotube catalysts for NO reduction with propane

Narasimharao, Katabathini; Malik, Maqsood Ahmad; Mokhtar, Mohamed; Basahel, Sulaiman N.; Al-Thabaiti, Shaeel A.

doi:10.1016/j.ceramint.2013.08.058

Cited by 16 publications

(6 citation statements)

References 48 publications

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“…Isolated iron is active and selective for NO reduction with propene in the presence of O 2 . 8 Narasimharao et al [18] investigated the NO reduction activity over different iron oxide supported 9…”

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confidence: 99%

“…with light hydrocarbons [17][18][19]. Tuti et al[17] reported that FeOx/ZrO 2 samples with low iron load 6 of less than 2.8Fe atoms nm −2 contain a large fraction of isolated Fe 3+ along with small iron oxide 7…”

mentioning

confidence: 99%

“…The catalytic activity tests were carried out in a fixed-bed flow ceramic reactor at 18 atmospheric pressure. A one-dimensional ceramic tube with an inner diameter of 25 mm was used 19…”

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confidence: 99%

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Preparation, characterization, and properties of monolithic Fe/Al2O3/cordierite catalysts for NO reduction with C2H6

Zhou

Liao

et al. 2015

Applied Catalysis A: General

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confidence: 99%

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confidence: 99%

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Preparation, characterization, and properties of monolithic Fe/Al2O3/cordierite catalysts for NO reduction with C2H6

Zhou

Liao

et al. 2015

Applied Catalysis A: General

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“…The absence of Fe diffraction peaks, even at 7.64 At% Fe, indicates that iron oxide may be highly dispersed on the surface of TiO 2 nanotube. It was reported that both Fe 3+ (0.64 Å ) and Ti 4+ (0.68 Å ) have similar ionic radius values; therefore, the Fe 3+ ions can enter into the crystal structure of titania and locate at interstices or occupy some of the lattice sites of TiO 2 , forming an iron-titanium solid solution [20].…”

Section: Resultsmentioning

confidence: 99%

Fabrication, characterization and photocatalytic performance of Fe-doped TiO2 nanotube composite for efficient degradation of water pollutants

Kim

2016

Desalination and Water Treatment

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A B S T R A C TPure TiO 2 nanotube and Fe-doped TiO 2 nanotube composite were fabricated by the electrochemical anodic oxidation process and the impregnating-calcination method, respectively. The structural and spectral properties were characterized by scanning electron microscopy, energy dispersive X-ray spectrometer, X-ray diffraction, Fourier transform infrared spectroscopy, photoluminescence, and UV-vis spectrum. These results showed that Fe was effectively deposited on the surface of TiO 2 nanotube. It is demonstrated that the Fe-doped TiO 2 nanotube composite can inhibit the recombination of electron-hole pairs and enhance the light harvesting ability. The photocatalytic activity of Fe-doped TiO 2 nanotube composite under UV irradiation was examined in terms of color and UV-vis absorbance for the degradation of methyl orange. The photocatalytic performance of UV-C irradiation in presence of Fe-doped TiO 2 nanotube composite increased obviously for the removal efficiency of color and UV-vis absorbance compared to that of UV-A irradiation, and the reaction rate constant was about 6.8 times faster than that of UV-A irradiation. This can be ascribed to the effective separation of the photo-generated charge carriers.

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“…Selective catalytic reduction of NO x with NH 3 (NH 3 -SCR) is well known as the best available control technology (BACT) to reduce nitrogen oxides due to its high efficiency [7,8]. Meanwhile, there exists some drawbacks such as high cost, high-temperature conversion of SO 2 to SO 3 , the toxicity, and volatility of vanadium species for the commercial vanadium-based catalyst [9][10][11][12][13][14][15][16]. Due to the non-toxicity, low cost, environment, and the outstanding redox ability between Fe III and Fe II , a series of iron-based mixed oxide catalysts prepared through co-precipitation, sol-gel, and impregnation methods have been developed by many researchers [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

The Role of Nitrate on the Sol-Gel Spread Self-Combustion Process and Its Effect on the NH3-SCR Activity of Magnetic Iron-Based Catalyst

et al. 2020

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Sol-gel spread self-combustion is the burning of the complexing agent in dried gel and the oxidant. Meanwhile, high temperature takes place during the combustion process, which is harmful to the pore structure of the catalyst. The nitrate from metal nitrate precursors as an oxidant could participate in the spread of the self-combustion process. Therefore, the influence of nitrate from metal nitrate on the spread self-combustion of an iron–cerium–tungsten citric acid gel and its catalytic performance of NOx reduction were investigated by removing nitrate via the dissolution of washing co-precipitation with citric acid and re-introducing nitric acid into the former solution. It was found that the removal of nitrate contributes to enhancing the NH3–SCR activity of the magnetic mixed oxide catalyst. The NOx reduction efficiency was close to 100% for Fe85Ce10W5–CP–CA at 250 °C while the highest was only 80% for the others. The results of thermal analysis demonstrate that the spread self-combustion process of citric acid dried gel is enhanced by re-introducing nitric acid into the citric acid dissolved solution when compared with the removal of nitrate. In addition, the removal of nitrate helps in the formation of γ-Fe2O3 crystallite in the catalyst, refining the particle size of the catalyst and increasing its pore volume. The removal of nitrate also contributes to the formation of Lewis acid sites and Brønsted acid sites on the surface of the catalyst compared with the re-introduction of nitric acid. The in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) demonstrates that both Eley–Rideal (E–R) and Langmuir–Hinshelwood (L–H) mechanisms exist over Fe85Ce10W5–CP–CA at 250 °C with E–R as its main mechanism.

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Iron oxide supported sulfated TiO2 nanotube catalysts for NO reduction with propane

Cited by 16 publications

References 48 publications

Preparation, characterization, and properties of monolithic Fe/Al2O3/cordierite catalysts for NO reduction with C2H6

Preparation, characterization, and properties of monolithic Fe/Al2O3/cordierite catalysts for NO reduction with C2H6

Fabrication, characterization and photocatalytic performance of Fe-doped TiO2 nanotube composite for efficient degradation of water pollutants

The Role of Nitrate on the Sol-Gel Spread Self-Combustion Process and Its Effect on the NH3-SCR Activity of Magnetic Iron-Based Catalyst

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