Production of η-alumina from waste aluminium dross

Das, B.; Dash, Barsha; Tripathy, B.C.; Bhattacharya, I.N.; Das, Supriyo

doi:10.1016/j.mineng.2006.09.002

Cited by 140 publications

(56 citation statements)

References 3 publications

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“…The bands at wavenumbers of 3568 and 34,358 cm −1 are attributed to the stretching vibration of -OH groups in the structure of hydration water. The band occurring at 1700 cm −1 is the result of stretching vibration of intermolecular interactions such as OH-O hydrogen bonds which existed in polymeric species of Al 3 The available bands at 1126 and 1058 cm −1 are the consequence of symmetrical bending vibration of Al-O-H group. The appearance of bands at wavenumbers of 965, 824, and 584 cm −1 is the results of bending vibration of Al-O-Al, the existence of AlO 4 group, and octahedral coordination of AlO 6 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, uncontrolled waste disposal leads to the loss of the remaining valuable materials in the composition of the waste. For the reasons mentioned above, many researchers are looking for appropriate solutions, especially green approaches, to retrieve the remaining valuable components and to eliminate or reduce the accumulation of such detrimental substances [2][3][4]. On the other hand, with increasing demand for valuable materials such as nanomaterials, strict environmental laws and regulations, sustainable production, recycling, and waste management have been converted into important research fields [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Production of nanostructured γ-alumina from aluminum foundry tailing for catalytic applications

Mahinroosta

Allahverdi

2018

Int Nano Lett

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Aluminum production industry tailings are considered as hazardous solid wastes accompanied by a variety of serious disposal, environmental, and public health issues. This study is devoted to presenting a promising solution for dealing with such problems. Within the scope of the present study, synthesis of nanostructured γ-alumina from aluminum foundry tailing using a novel process was presented. The proposed process will provide a multilateral advantage to both environment and industries. Firstly, the amount of tailing and accordingly, disposal cost could be partly lessened; secondly, the environmental pollution can be reduced, and finally, if possible, green production of advanced materials from this kind of waste at a rational expense can bring about the conservation of natural sources and also gain economic benefits. Characterization of the as-synthesized products was performed using X-ray diffractometry (XRD), X-ray fluorescence (XRF), Fourier-transform infrared (FTIR) spectroscopy, field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDAX), and dynamic light scattering (DLS) for crystalline phase analysis, chemical composition, chemical bond recognition, morphology, elemental analysis, and particle size distribution, respectively. The chemical composition analyzed by XRF indicated that the as-synthesized alumina exhibits a purity of more than 97 wt%. The XRD pattern majorly possessed characteristic peaks related to the gamma phase of alumina. Microstructural analyses by FESEM and TEM confirmed the nano-sized morphology of the as-synthesized γ-alumina.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Production of nanostructured γ-alumina from aluminum foundry tailing for catalytic applications

Mahinroosta

Allahverdi

2018

Int Nano Lett

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“…According to Hwang et al [15] and Tsakiridis et al [14], metallic aluminum could be recovered by screening and sieving after crushing and grinding the original Al dross. Second, Das et al [7] reported that when Al dross was subjected to acid treatment with 15% H2SO4 concentration, the material recovered alumina at around 71% yield. Therefore, alumina content increased to 593.59 mg.g -1 , when the Al dross was treated with acid at 20 wt%.…”

Section: Characterization Of the Catalystmentioning

confidence: 99%

“…Kim et al [6] prepared CrAPO -5 (the chromium-containing analogue of AlPO4 -5 ) by using Al dross and identical properties were obtained with sample prepared by Al(OH)3. Das et al [7] produced ή-alumina from waste Al dross by leaching, hydrolyzing and calcination. In short, Al dross can be utilized as an alternative material of Al for preparation of the catalysts.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Application of Aluminum Dross as Catalyst in Pyrolysis of Waste Cooking Oil

Kamil

Salmiaton

Shahruzzaman

et al. 2016

Bull. Chem. React. Eng. Catal.

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Aluminium dross, a waste material produced by dissolution of aluminum scrap, was characterized physically and chemically by various analysis techniques for a potential to be used as catalyst. Using catalyst from waste materials reduced the cost for synthesizing of new catalyst. An efficient catalyst derived from industrial solid waste was modified by acid washing for using in a pyrolysis of waste cooking oil. The modification of aluminum dross resulted in increased surface area (from 0.96 to 68.24 m 2 /g), acidity (from 315 to 748 µmol/g) and thermal stability. Pyrolysis waste cooking oil was used to test the performance of aluminum dross as catalyst before and after modification. The product analysis showed a better result than the unmodified material based on increased yield of bio-oil and improved selectivity.

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“…Till now, some progress has been made in iron-based metal oxides catalysts [16]. On the other hand, various metal oxide wastes that include red mud [17,18], fly ash [19] and aluminum dross [20] are inexpensive materials that can be directly used in catalyst preparation, among which the red mud contains abundant effective iron oxides and thereby is valuable in research on SCR deNO x catalyst. Therefore, a systematic study is needed to assess the feasibility of red mud for SCR deNO x in coal-fired flue gas processing.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of Modified Red Mud-Based Catalysts for Selective Catalytic Reduction of NOx with NH3

Gong

et al. 2018

Catalysts

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Bayer red mud was selected, and the NH 3 -SCR activity was tested in a fixed bed in which the typical flue gas atmosphere was simulated. Combined with XRF, XRD, BET, SEM, TG and NH 3 -Temperature Programmed Desorption (TPD) characterization, the denitration characteristics of Ce-doped red mud catalysts were studied on the basis of alkali-removed red mud. The results showed that typical red mud was a feasible material for denitration catalyst. Acid washing and calcining comprised the best treatment process for raw red mud, which reduced the content of alkaline substances, cleared the catalyst pore and optimized the particle morphology with dispersion. In the temperature range of 300-400 • C, the denitrification efficiency of calcined acid washing of red mud catalyst (ARM) was more than 70%. The doping of Ce significantly enhanced NH 3 adsorption from weak, medium and strong acid sites, reduced the crystallinity of α-Fe 2 O 3 in ARM, optimized the specific surface area and broadened the active temperature window, which increased the NO x conversion rate by an average of nearly 20% points from 250-350 • C. The denitration efficiency of Ce 0.3 /ARM at 300 • C was as high as 88%. The optimum conditions for the denitration reaction of the Ce 0.3 /ARM catalyst were controlled as follows: Gas Hourly Space Velocity (GHSV) of 30,000 h −1 , O 2 volume fraction of 3.5-4% and the NH 3 /NO molar ratio ([NH 3 /NO]) of 1.0. The presence of SO 2 in the feed had an irreversible negative effect on the activity of the Ce 0.3 /ARM catalyst.

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Production of η-alumina from waste aluminium dross

Cited by 140 publications

References 3 publications

Production of nanostructured γ-alumina from aluminum foundry tailing for catalytic applications

Production of nanostructured γ-alumina from aluminum foundry tailing for catalytic applications

Characterization and Application of Aluminum Dross as Catalyst in Pyrolysis of Waste Cooking Oil

Preparation and Performance of Modified Red Mud-Based Catalysts for Selective Catalytic Reduction of NOx with NH3

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