SYNTHESIS OF NICKEL BASED CORE-SHELL CATALYST AND CHARACTERIZATION FOR DRY REFORMING OF METHANE PROCESS

• Main Author: Rinindra Putri, Enrisha
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/48695
• Institution: Institut Teknologi Bandung

Dry reforming of methane reaction is a reaction between CO2 and CH4 to produce synthesis gas (CO and H2). This reaction requires a very high temperature around 800oC for the reaction to take place and results in high conversion. The catalyst commonly used for this reaction is a catalyst with nickel as the active site, one of which is the Ni/Al2O3 catalyst. The disadvantage of commercial catalysts that are commonly used is the deactivation of catalysts due to the phenomenon of sintering caused by the high operating temperature needed in the reaction. Choosing the right catalyst to use can minimize catalyst deactivation and can improve catalyst performance. The latest technology in making catalysts for the dry reforming of methane reaction is in the form of core-shell NiO@Al2O3 which can prevent the catalyst from deactivating the catalyst. This study aims to synthesize and characterize the NiO@Al2O3 catalyst for the dry reforming of methane reaction. Synthesis of catalyst was carried out using the microemulsion method. Variations made in this study are variations in the composition of nickel of 77% -wt, 64% wt, and 52% -wt with variations in calcination temperature carried out at 600oC, 700oC and 800oC. This study compared the effect of nickel and alumina composition and catalyst calcination temperature on crystallinity, surface area, pore size distribution, and catalyst morphology. Characterization was performed using the XRF, XRD, HRTEM, BET, and BJH tests. The results showed that the average crystallite size of the NiO@Al2O3 catalyst produced is in the range of 9-13 nm, surface area is in the range of 73 –171 m2/g, and pore diameters of 10- 22 nm. The synthesized NiO@Al2O3 catalyst has the form of multiple small core-shell coated by a single shell material with NiO particle size less than 20 nm. The core-shell structure obtained is able to inhibit the increase in Ni grain size (sintering) effectively at high temperatures compared to NiO/Al2O3 impregnation catalysts.