Low-Cost Synthesis of Zsm-5 Zeolite Using Organic Silica from Rice Husk Agro Waste

Priyadi Priyadi; Nurleni Kurniawati; Vera Prawestiana

doi:10.37676/agritepa.v9i1.2104

Priyadi Priyadi Politeknik Negeri Lampung
Nurleni Kurniawati Program Studi Agroteknologi, Sekolah Tinggi Ilmu Pertanian Dharma Wacana
Vera Prawestiana Jurusan Sains, Institut Teknologi Sumatera

DOI: https://doi.org/10.37676/agritepa.v9i1.2104

Keywords: Rice Husk, Silica, Synthesis, Zeolite

Abstract

Rice husk is an agricultural waste that has the potential source of silica in low-cost zeolite synthesis. The objectives of this study were 1) silica extraction of rice husks as synthetic zeolite raw materials, 2) synthesis and characterized ZSM-5 zeolite from rice husks silica. Silica extraction was carried out by soaking rice husks using a heated 15% NaOH solution. Furthermore, 10% HNO₃ solution was added to pH 7 for 12 hours. The filtrate dried in an oven for 12 hours at 100^oC. Analysis of silica composition using XRF, crystallinity using XRD, and SEM for morphology. The results showed that rice husks were successfully extracted with an alkali addition and used as a source of silica in the synthesized of ZSM-5 zeolite. The zeolite synthesis was carried out with a low temperature of 90^oC and a structural directing agent decrease. Zeolite ZSM-5 showed that the level of crystallinity and morphology by the standard ZSM-5 zeolite. Decreasing of the structural directing agent was found at the SDA/Si ratio of 0.045.

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