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Sains Malaysiana 45(11)(2016): 1723–1731
Synthesis of Zeolite
from Coal Fly Ash by Hydrothermal Method without Adding Alumina
and Silica Sources: Effect of Aging Temperature and Time (Sintesis
Zeolit daripada
Abu Cerobong Arang Batu melalui Kaedah
Hidroterma Tanpa
Menambah Sumber Alumina dan Silika: Kesan
Penuaan Suhu
dan Masa) W. CHANSIRIWAT1,2, D. TANANGTEERAPONG1
& K. WANTALA1,2,3* 1Department of Chemical Engineering,
Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand 2Chemical Kinetics and Applied Catalysis
Laboratory (CKCL), Faculty of Engineering, Khon Kaen
University, Khon Kaen
40002, Thailand 3Research Center for Environmental
and, Hazardous Substance Management (EHSM) Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand Received: 25 December 2015/Accepted:
4 April 2016 ABSTRACT The aim of this research was
to synthesize zeolite from coal fly ash by hydrothermal method.
The effect of aging temperature and time on zeolite P1 synthesis
(Na-P1) from Mae Moh coal fly ash (MFA) without adding any alumina
and silica sources were examined during the synthesized process.
The central composite design (CCD) was used for experimental design
to obtain the optimal process parameters of the aging temperature
(105-195ºC) and time (12-84 h) where the specific surface area
was used as a response. The chemical and physical properties of
Na-P1 such as specific surface area, crystalline phase, compositions
and morphology were examined. The response results showed that
the specific surface area of Na-P1 decreased with an increase
of both aging temperature and time, whereas the XRD intensity
of Na-P1 increased with an increase of both aging temperature
and time. The composition of SiO2/Al2O3 in
mass ratio of coal fly ash was observed, which was suitable to
Na-P1 synthesis. The maximum specific surface area of zeolite
products was found at the designed condition of aging temperature
of 105ºC and time of 12 h. Thus, zeolite P1 can be prepared by
hydrothermal method without adding any alumina and silica sources. Keywords: Coal fly ash; Coal
power plant; response surface methods; zeolite synthesis ABSTRAK Tujuan kajian ini adalah untuk mensintesis
zeolit daripada
abu cerobong arang
batu melalui
kaedah hidroterma. Kesan penuaan suhu
dan masa pada
zeolite sintesis P1 (Na-P1) daripada abu cerobong arang
batu Mae Moh
(MFA)
tanpa menambah
apa-apa sumber alumina dan silika dikaji
semasa proses sintesis.
Pusat reka bentuk
komposit (CCD) telah
digunakan untuk
uji kaji reka
bentuk bagi
mendapatkan parameter proses optimum pada
suhu penuaan
(105-195ºC) dan masa (12-84 h) dengan kawasan permukaan tertentu digunakan sebagai tindak balas. Sifat kimia dan fizikal Na-P1 seperti kawasan permukaan yang khusus, fasa hablur,
komposisi dan
morfologi telah ditentukan. Hasil maklum balas
menunjukkan bahawa kawasan permukaan tertentu Na-P1 menurun dengan peningkatan suhu penuaan dan
masa, manakala keamatan
XRD
Na-P1 terus meningkat
dengan peningkatan suhu penuaan dan
masa. Komposisi oleh SiO2/Al2O3 dalam nisbah jisim
abu cerobong
arang batu diperhatikan,
sesuai untuk
sintesis Na-P1. Kawasan maksimum permukaan tertentu produk zeolit telah ditemui
pada satu
keadaan penuaan suhu 105ºC dan masa 12 h. Oleh itu, zeolit
P1 boleh disediakan
dengan menggunakan kaedah hidroterma tanpa menambah apa-apa sumber alumina dan silika. Kata kunci: Abu cerobong
arang batu;
kaedah gerak balas
permukaan; loji
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