Synthesis of gamma alumina from Kankara kaolin using a novel technique

Salahudeen, Nurudeen; Ahmed, Abdulkarim S.; Al-Muhtaseb, Ala’a H.; Dauda, Mohammed; Waziri, Saidu M.; Jibril, Baba Y.

doi:10.1016/j.clay.2014.11.041

Cited by 49 publications

(28 citation statements)

References 25 publications

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“…Kaolin has been a very useful and versatile domestic and industrial material known much before the industrial revolution and the oldest known use of the kaolin is as a ceramic raw material [21]. The other uses of kaolin include applications in medicine, coated paper, paint and construction [22]. Thus, using cheap and abundantly available kaolin to partly replace nano-Al 2 O 3 is cost effective and practical approach.…”

Section: Introductionmentioning

confidence: 99%

Spent wash decolourization using nano-Al2O3/kaolin photocatalyst: Taguchi and ANN approach

David

Arivazhagan

Ibrahim

2015

Journal of Saudi Chemical Society

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Please cite this article as: C. David, M. Arivazhagan, M. Ibrahim, Spent wash decolourization using nano-Al 2 O 3 / kaolin photocatalyst: Taguchi and ANN approach, Journal of Saudi Chemical Society (2015), doi: http://dx. AbstractThe intense colour of the spent wash effluent leads to crucial ecological issue when released untreated into the environment. The decolourization of distillery spent wash effluent is known to be a very challenging task. In this study, the degradation of organic pollutants in the form of colour was performed using nano photocatalyst prepared using aluminium oxide (Al 2 O 3 ) nanoparticle and kaolin clay. As-synthesized nano-Al 2 O 3 /kaolin composites were used as photocatalyst for colour degradation of spent wash effluent. The process parameters such as dosage, pH, temperature and agitation were optimized to attain the maximum decolourization efficiency. The structural and the textural characteristics of the photocatalyst were analyzed by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis, High Resolution Scanning Electron Microscope (HRSEM) and Energy Dispersive X-ray (EDAX).Optimization of the process parameters using Taguchi Orthogonal Array (OA) design resulted in a maximum of 80% spent wash decolourization. Using Artificial Neural Network (ANN), a two layered feedforward backpropagation model resulted as the best performance and predictive model for spent wash decolourization. The experimental data was found to be in excellent agreement with the predicted results from the ANN model.

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Section: Introductionmentioning

confidence: 99%

Spent wash decolourization using nano-Al2O3/kaolin photocatalyst: Taguchi and ANN approach

David

Arivazhagan

Ibrahim

2015

Journal of Saudi Chemical Society

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“…Each lump represents a macrostructure consisting of agglomerated particles with irregular particle shapes. Therefore, it could be deduced from the images that the gamma-alumina possessed a lumpy anhedral morphology (Salahudeen, 2014), this further shows the amorphous nature of the gammaalumina produced as already shown by the XRD result. The structural morphology was a flake-like euhedral morphology, which is in agreement with reported works (Aderemi and Hameed, 2011;Salahudeen et al, 2014).…”

Section: Methodsmentioning

confidence: 92%

“…Zeolites are microporous aluminosilicate minerals used for numerous commercial and domestic applications. The content of zeolite in zeolite catalyst is not greater than 3-15% (Salahudeen et al, 2014). Zeolite Y is used commercially as catalyst in petroleum refinery because of its high concentration of active acid sites, its high thermal stability, high size selectivity and its crystal size is in the approximate range of 0.2 -0.5µm and pore diameter of 7.4Ǻ (Htay, 2008).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Gamma-Alumina from Kankara Kaolin as Potential Zeolite Active Matrix

Bawa¹,

Ahmed²,

Okonkwo³

2017

Nig J Bas App Sci

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Commercial fluid catalytic cracking catalysts are manufactured using zeolites dispersed on an amorphous matrix, which is mostly alumina. Alumina is widely used as catalyst support in many heterogeneous catalytic processes owing to its high surface area, superior chemical activity and low cost. In compounded zeolite catalyst it serves as the active matrix which aids the conversion of the bulkiest molecules in the feed owing to its larger pore size than zeolite. Large specific surface area gamma-alumina (γ-Al2O3) was synthesized by hydrothermal method using Kankara kaolin as starting material. Thermal treatment of ammonium alum prepared from the filtrate of the dealuminated metakaolin was employed to obtain the alumina. Crystalline aluminum sulfate with 39 wt% Al2O3 was obtained at calcination temperature of 800°C with 3 h soaking. Gamma-alumina was produced at 850°C with 3 h soaking time, having specific surface area of 166 m 2 /g. The weight percent of Al2O3 content in the synthesized and commercial gamma-alumina were 85% and 89% respectively as obtained from the XRF analysis. Good comparison was also observed in the diffractogram of the synthesized and commercial gamma-alumina from the XRD analysis. The Scanning Electron Microscopy (SEM) image showed the platy hexagonal shape of the gamma-alumina.

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“…In order to obtain the maximum adsorption capacity and the optimum conditions for fluoride ions removal, two most widely used equilibrium models were employed to carry out the equilibrium fluoride adsorption data (q e VS. C e ). One is Langmuir, which indicates the monolayer adsorption on uniform homogeneous surface with identical sites of adsorbent [36]; the other one is Freundlich, which indicates the heterogeneity of the adsorbent surface and considers multilayer adsorption [37].…”

Section: Adsorption Isotherm Studiesmentioning

confidence: 99%

Controllable synthesis of mesoporous alumina with large surface area for high and fast fluoride removal

Liu

Dong

et al. 2016

Ceramics International

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Synthesis of gamma alumina from Kankara kaolin using a novel technique

Cited by 49 publications

References 25 publications

Spent wash decolourization using nano-Al2O3/kaolin photocatalyst: Taguchi and ANN approach

Spent wash decolourization using nano-Al2O3/kaolin photocatalyst: Taguchi and ANN approach

Synthesis of Gamma-Alumina from Kankara Kaolin as Potential Zeolite Active Matrix

Controllable synthesis of mesoporous alumina with large surface area for high and fast fluoride removal

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