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Using the response surface methodology to optimize the extraction of silica and alumina from coal fly ash for the synthesis of zeolite Na-A

Response surface methodology and inductively coupled plasma-optical emission spectroscopy were used to analyze the silicon (Si) and aluminum (Al) ion concentrations extracted from microwave-assisted hydrothermal fusion reactions between coal fly ash (CFA) and sodium hydroxide solution. The extracts...

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Main Authors: Matlob, Abdul Salam, Kamarudin, Rose Aini, Jubri, Zaemah, Ramli, Zainab
Format: Article
Published: King Fahd University of Petroleum and Minerals 2012
Subjects:
Q Science (General)
Online Access:http://eprints.utm.my/id/eprint/47700/
http://dx.doi.org/10.1007/s13369-011-0149-2
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spelling my.utm.477002018-10-21T04:33:13Z http://eprints.utm.my/id/eprint/47700/ Using the response surface methodology to optimize the extraction of silica and alumina from coal fly ash for the synthesis of zeolite Na-A Matlob, Abdul Salam Kamarudin, Rose Aini Jubri, Zaemah Ramli, Zainab Q Science (General) Response surface methodology and inductively coupled plasma-optical emission spectroscopy were used to analyze the silicon (Si) and aluminum (Al) ion concentrations extracted from microwave-assisted hydrothermal fusion reactions between coal fly ash (CFA) and sodium hydroxide solution. The extracts containing Si and Al ions were successfully converted to zeolites by hydrothermal treatment at 95°C for 72 h. Fifteen experimental conditions for the extraction process were obtained using Box-Behnken design through the manipulation of three independent variables. These variables include NaOH concentration (2, 4 and 6 M), power level of microwave irradiation (10, 50 and 100 W)+++ and exposure time (1, 3.5 and 6 min). The statistical analysis result indicated a significant interaction effect with a p value of 0.001. Increasing the values of all the three variables led to an increase in the concentration of Si and Al ions in the CFA extract. The optimized combinations of the three variables within the experimental range for Si and Al extraction were 5.6 M for NaOH concentration, 5.5 min time of exposure to microwave irradiation and 100 W of microwave power level. Based on the extracted concentration values of Si and Al, three products were isolated; zeolite Na-A, sodalite octahydrate and gibbsite which were characterized by their XRD images. Plots of percent yield of the final products versus [Si 4+] and [Al 3+] revealed a trend of the types of product for various ranges of concentrations of the ions in the extracts prior to hydrothermal treatment at 95°C King Fahd University of Petroleum and Minerals 2012 Article PeerReviewed Matlob, Abdul Salam and Kamarudin, Rose Aini and Jubri, Zaemah and Ramli, Zainab (2012) Using the response surface methodology to optimize the extraction of silica and alumina from coal fly ash for the synthesis of zeolite Na-A. Arabian Journal of Science and Engineering, 37 (1). pp. 27-40. ISSN 1319-8025 http://dx.doi.org/10.1007/s13369-011-0149-2 DOI: 10.1007/s13369-011-0149-2
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic Q Science (General)
spellingShingle Q Science (General)
Matlob, Abdul Salam
Kamarudin, Rose Aini
Jubri, Zaemah
Ramli, Zainab
Using the response surface methodology to optimize the extraction of silica and alumina from coal fly ash for the synthesis of zeolite Na-A
description Response surface methodology and inductively coupled plasma-optical emission spectroscopy were used to analyze the silicon (Si) and aluminum (Al) ion concentrations extracted from microwave-assisted hydrothermal fusion reactions between coal fly ash (CFA) and sodium hydroxide solution. The extracts containing Si and Al ions were successfully converted to zeolites by hydrothermal treatment at 95°C for 72 h. Fifteen experimental conditions for the extraction process were obtained using Box-Behnken design through the manipulation of three independent variables. These variables include NaOH concentration (2, 4 and 6 M), power level of microwave irradiation (10, 50 and 100 W)+++ and exposure time (1, 3.5 and 6 min). The statistical analysis result indicated a significant interaction effect with a p value of 0.001. Increasing the values of all the three variables led to an increase in the concentration of Si and Al ions in the CFA extract. The optimized combinations of the three variables within the experimental range for Si and Al extraction were 5.6 M for NaOH concentration, 5.5 min time of exposure to microwave irradiation and 100 W of microwave power level. Based on the extracted concentration values of Si and Al, three products were isolated; zeolite Na-A, sodalite octahydrate and gibbsite which were characterized by their XRD images. Plots of percent yield of the final products versus [Si 4+] and [Al 3+] revealed a trend of the types of product for various ranges of concentrations of the ions in the extracts prior to hydrothermal treatment at 95°C
format Article
author Matlob, Abdul Salam
Kamarudin, Rose Aini
Jubri, Zaemah
Ramli, Zainab
author_facet Matlob, Abdul Salam
Kamarudin, Rose Aini
Jubri, Zaemah
Ramli, Zainab
author_sort Matlob, Abdul Salam
title Using the response surface methodology to optimize the extraction of silica and alumina from coal fly ash for the synthesis of zeolite Na-A
title_short Using the response surface methodology to optimize the extraction of silica and alumina from coal fly ash for the synthesis of zeolite Na-A
title_full Using the response surface methodology to optimize the extraction of silica and alumina from coal fly ash for the synthesis of zeolite Na-A
title_fullStr Using the response surface methodology to optimize the extraction of silica and alumina from coal fly ash for the synthesis of zeolite Na-A
title_full_unstemmed Using the response surface methodology to optimize the extraction of silica and alumina from coal fly ash for the synthesis of zeolite Na-A
title_sort using the response surface methodology to optimize the extraction of silica and alumina from coal fly ash for the synthesis of zeolite na-a
publisher King Fahd University of Petroleum and Minerals
publishDate 2012
url http://eprints.utm.my/id/eprint/47700/
http://dx.doi.org/10.1007/s13369-011-0149-2
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score 13.211869

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