Performance Improvement of Catalyst HZSM-5 Hierarchically through Nickel Impregnation for Cellulose Hydrolysis Reaction Mita Rilyanti (a*), Fransiska Valen Lintang Asmara (a), Annisa Distiani (a), Aprilia Sashya Kirana (a), Camelia (a), Mulyono (a), Suharso (a)
(a) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Lampung University, Bandar Lampung-35141 (Indonesia)
*mita.rilyanti[at]fmipa.unila.ac.id
Abstract
In this research, the synthesis of HZSM 5 and HZSM5 hierarchically based on silica bagasse ash (SCBA) was carried out using starch as Bio Mesoporogen. Efforts to improve catalyst performance were carried out by modifying the acid site through impregnation of nickel metal on the catalyst framework and its performance was studied in the hydrolysis reaction of banana peel cellulose. The characteristics of the extracted silica showed an amorphous phase with SiO2 and Al2O3 content percentage of 77.176 persen and 10.536 respectively and confirmed the presence of silanol functional groups and siloxane groups. SCBA silica was used to synthesize hierarchical pore ZSM 5 using a seeding technique via the hydrothermal method at a temperature of 180C for 144 hours. The hierarchical HZSM 5 and HZSM 5 catalysts showed a crystalline phase with crystallinity percentage of 86.13 and 70.41, respectively. The results of SEM analysis show differences in morphology where H-ZSM-5 is hexagonal (coffin type) while hierarchical HZSM 5 is in the form of small particles in the form of relatively uniform aggregates and a bulky shape with a surface area of 191.615 m2/g and a pore size distribution (PSD) 3.7 nm. Characterization of the hierarchical Ni/HZSM 5 and Ni/HZSM 5 catalysts shows that the Ni metal percentage contained in HZSM 5 is 0.490 and 0.298 respectively. The hierarchical Ni/HZSM 5 catalyst test obtained a cellulose conversion percentage of 76.68 with optimum reaction conditions, namely a temperature of 140 C for 3 hours with a catalyst/cellulose ratio of 3:5. This result is better than the percent conversion produced using the hierarchical HZSM 5 catalyst without Ni metal impregnation.
