%A Andarini, Novita %A Haryati, Tanti %A Lutfia, Zuhrotul %D 2018 %T Synthesis of Zeolite A From Coal Fly Ash with Variation of Si/Al Molar Ratio %K %X Fly ash containing 30-36% silica and 14,52-23,78% alumina can be potentially as raw material for synthetic zeolite such as zeolite A. Zeolite A is an aluminosilicate mineral which is rich in alumina so that this zeolite has a good cation exchange capability. Zeolite A has been synthesized by hydrothermal treatment after NaOH fusion. Fly ash has been fused with NaOH at 550 0C for 40 minutes and hydrothermally treated at 1000C for 5 hours. The hydrothermal treatment was conducted in some various Si/Al molar ratios from 0.90; 1.00.; 1.05; to 1.24. The zeolite A was then analyzed using XRD and XRF. The best zeolite A based on XRD result is zeolite with Si/Al molar ratio of 1.1 with crystallinity of 96,80%. The x-ray fluorescence result showed that the Si/Al molar ratios of the four zeolite samples were close to of Si/Al molar ratios of 1, 1.1, 1.21.3 respectively. Keywords : Fly ash, Zeolite A, Hydrothermal Fusion %U https://jurnal.unej.ac.id/index.php/JID/article/view/5910 %J Jurnal ILMU DASAR %0 Journal Article %R 10.19184/jid.v19i2.5910 %P 105-110%V 19 %N 2 %@ 2442-5613 %8 2018-07-30