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Research Article

Preparation of amorphous silica from a renewable agricultural waste of rice husk ash by calcination method combined with chemical activation

Gizem Tufaner, Açelya Çalışkan, Huriye Banu Yener, Şerife Şeref Helvacı

Department of Chemical Engineering, Ege University, İzmir, Turkey

Keywords

Abstract


SiO2;

Calcination;

Rice husk ash;

Alkali hydroxide;

Chemical activation

In the study, silica particles were synthesized from rice husk ash by calcination method in the presence of activating agents. The parameters which are effective in calcination method on structure and morphology of synthesized silica particles, activating agent type (NaOH and KOH), the calcination temperature (500-850°C), the calcination time (1-3 hours) and the weight ratio of activating agent to ash (4:1 and 5:1), were investigated. The crystal structures of the silica particles were determined by XRD, agent structures by FTIR, sizes and shapes by SEM, surface areas and porous structures by N2 adsorption-desorption analysis. Amorphous silica particles were synthesized in all experimental conditions. Optimum weight ratio, calcination temperature and time were determined as 4:1, 750°C and 2 hours, respectively. The activating agent NaOH was found to be more active than KOH in the preparation of silica© 2019 MIM Research Group. All rights reserved.

DOI: http://dx.doi.org/10.17515/resm2019.79ma1205                          Full Text

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25/12/2019 Most Cited Paper Award: The paper authored by Manoj Sahni and Sanjeev Sharma entitled as “Elastic-plastic deformation of a thin rotating solid disk of exponentially varying density" is awarded the 2019 Most Cited Paper Award of Research on Engineering Structures and Materials (RESM).

25/12/2019 Best Paper Award: The paper authored by Marcelo Mesquita do Amaral, Matheus Wanglon Ferreira and Mauro de Vasconcellos Real entitled as “A simplified method for analysis of reinforced concrete beams exposed to fire situation” is awarded the 2019 Best Paper Award of Research on Engineering Structures and Materials (RESM).


13/11/2019 Data articles as a new type of submision: Editorial Board of our journal have decided to accept a new type of submission: data articles. The focus of these papers is only on data and how it is collected but not on its interpretation and drawn conclusions. For more see News section.


24/5/2019 Collaboration for THERMAM 2019: Editorial Board of our journal and Organizing Committee of 6th International Conference of Thermophysical and Mechanical Properties of Advanced Materials, 8th Rostocker International Conference of Thermophysical Properties for Technical Thermodynamics have agreed to collaborate. Extended versions of the selected papers from the conference will be published in our journal. For more see Events.


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LATEST AWARDS


2019 Most Cited Paper Award:

The paper authored by Manoj Sahni and Sanjeev Sharma entitled as “Elastic-plastic deformation of a thin rotating solid disk of exponentially varying density" is awarded the


2019 Best Paper Award:

The paper authored by Marcelo Mesquita do Amaral, Matheus Wanglon Ferreira and Mauro de Vasconcellos Real entitled as “A simplified method for analysis of reinforced concrete beams exposed to fire situation” is awarded the 


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Last Update:

15.02.2020

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