Characterization and Application of HCl-Activated LTA Zeolite from Lampung Natural Zeolite (LNZ) for Bioethanol Purification

Abstract

Lynde Type-A (LTA) zeolite as being molecular sieve and hydrophilic zeolite is used to dehydrate water in the purification of bioethanol. LTA zeolite from LNZ has a small surface area of 29,62 m2/g. Adding HCl activators to LTA Zeolite from LNZ was carried out to increase the surface area of LTA zeolite. The activation of LTA zeolite was carried through in a closed erlemeyer with various HCl concentration: 10% w/w, 15 % w/w, and 20% w/w and the ratio acid/LTA zeolite was 10 ml: 1 gram. The XRD analysis showed that the structure of LTA zeolite activated does not change despite the process of activation, and the highest percentage of crystallinity was obtained at 68.25% wt by concentration of HCl at 20 % w/w. The result of XRF analysis showed that the highest of impurity removal and the highest of decreasing ratio of Si/Al was in the LTA zeolite activated by HCl 20% w/w. The result of BET analysis showed the largest surface area at 45.67 m2/g obtained by adding 10% w/w of HCl activator, which was 45.67 m2/g, and the size of zeolite’s pore volume was 0.027 cc/g. The result performance of LTA zeolite activated obtained the highest purity of bioethanol by 99.74 % v/v at HCl concentration 20% w/w.

Kajian Pemanfaatan Zeolit Alam Ende sebagai Katalis dalam Pirolisis Polietilena dari Sampah Plastik

“…Karena reaksi pirolisis menggunakan mekanisme reaksi orde 1, maka persamaan di atas dapat diterapkan ke dalam persamaan regresi linear sederhana dengan cara menurunkannya ke dalam bentuk fungsi eksponensial, yaitu: (Himawanto, 2013) Zeolit alam yang didominasi oleh jenis mordenit dan klinoptilolit. Hasil analisis juga menunjukkan sampel zeolit alam Ende ini memiliki banyak fasa amorf yang ditandai dari base line yang membentuk bukit, sehingga dapat mengurangi daya katalitik dari zeolit ini (Ginting et al, 2022).…”