SINTESIS ZEOLIT A DARI ABU DASAR BATUBARA (COAL BOTTOM ASH) DENGAN METODE PELEBURAN DAN HIDROTERMAL

Sunarti Sunarti

doi:10.30598/MJoCEvol11iss1pp8-16

Sunarti Sunarti Departement of Chemistry-FKIP, Pattimura University Ambon

DOI: https://doi.org/10.30598/MJoCEvol11iss1pp8-16

Keywords: Zeolite, coal bottom ash, fussion method, hydrothermal method

Abstract

Zeolites can be synthesized from materials containing silica (SiO₂) and alumina (Al₂O₃). The analysis showed that the coal bottom ash from PLTU Paiton contained a number of oxides, namely: SiO₂ 49.73%; Al₂O₃ 19.51%; Fe₂O₃ 16.18%; CaO 5.40%; MgO 2.96%; Na₂O 1.23%; K₂O 0.84%; TiO₂ 0.99%; MnO 0.17%; and LOI of 2.38%. Zeolite from coal bottom ash was carried out by fussion and hydrothermal methods. Based on the percentage of alumina from the bottom ash, it is necessary to add pure alumina for the perfection of the zeolite formed. The addition of 1.5 g sodium aluminate resulted in a higher crystallinity level of the zeolite. This is indicated by the appearance of sharp peaks at 2Î¸ = 30.098 (d = 2.96); 24.14 (d = 3.68); 27.24 (d = 3.27); 6.63 (d = 13.31); 7.08 (d = 12.47); 7.32 (d = 12.06) and 10.30 (d = 8.58). Based on the comparison of the peaks that appear on the diffractogram with the standards proposed by Ballmoos, with the addition of 1.5 grams of aluminate, the overall zeolite formed is zeolite A.

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