Sumari, Ni'Matus Sholihah, Mahrullina Mahirotul Aisiyah, Intan Oktaviani, Natasha Khilmi, Yana Fajar Prakasa
This study aimed to convert cotton cellulose into glucose using the catalyst of activated natural zeolite assisted by ultrasonic. The catalyst of hydrolysis of cellulose into glucose used acid-activated natural zeolite. Preparation and activation of natural zeolite used HCl solution 1M, 2M, and 3M. This activated natural zeolite was characterized using Freundlich adsorption isotherms, XRD, and XRF. Hydrolysis of cotton cellulose assisted by ultrasonic-waves was conducted for 1, 2, and 4 hours. Identification of the degradation product used Fehling test and Nelson-Somogyi test. Based on the Freundlich adsorption isotherm analysis, the natural zeolite activated by 1M HCl solution had the largest surface area of 120 m2/g. The XRD diffractogram showed that zeolite before and after the activation process had a similar type structure that is mordenite. Meanwhile, the XRF test showed a decrease in the relative percentage of impurities followed by the increase in Si and Al percentage on activated natural zeolite with Si/Al ratio of 7.13. Based on the Fehling and Nelson-Somogyi test, the highest yield of glucose of 4.51% was obtained when using a catalyst natural zeolite activated with HCl 1 M for 4 hours sonication time. © Published under licence by IOP Publishing Ltd.
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia
