Oxidation of 5-hydroxymethylfurfural into 2,5-furandicarboxylic acid over CuO and NiO modified natural sourced hierarchical ZSM-5 Idra Herlina (a), Yuni Krisyuningsih Krisnandi (b*), Muhammad Ridwan (b)
(a) Department of Chemistry, Institut Teknologi Sumatera, Lampung Selatan 35365
(b) Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Indonesia, Depok 16424
*yuni.krisnandi[at]sci.ui.ac.id
Abstract
FDCA (2,5-furandicarboxylic acid) is one of platform compounds with prospective applications. For example, in polyethylene 2,5-furandicarboxylic (PEF) production, an alternative bioplastic from polyethylene terephthalate (PET). FDCA can be synthesized by oxidation from 5-hydroxymethylfurfural (HMF). In this study, oxidation of HMF to FDCA was carried out over ZSM-5-based catalysts from natural sources. ZSM-5 was impregnated with CuO and NiO metals to increase its acidity and oxidizing ability. The physicochemical properties of the catalyst were determined by characterization using XRD, FT-IR, SEM-EDX, SAA and NH3-TPD. The results showed that synthesized ZSM-5 had hierarchical pores with a surface area of 123.58 m2/g. Impregnation with CuO and NiO did not change the crystallinity and functional groups of ZSM-5 but increased the acidity from the amount of acid by 0.361 mmol/g to 0.586 mmol/g for CuO/ZSM-5 and 0.379 mmol/g for NiO/ZSM-5. The conversion of HMF to FDCA was observed by High-Performance Liquid Chromatography (HPLC) to determine the yield of FDCA and the intermediate compounds, such as 5-hydroxymethylfuroic acid (HMFCA), 5-formylfuroic acid (FFCA), and 2,5-diformylfuran (DFF). HPLC results showed no DFF signal, indicating the formation of FDCA from HMF through HMFCA and FFCA. The reaction^s highest conversion results were shown using a NiO/ZSM-5 catalyst at a temperature of 130 oC for 4 hours, with an FDCA yield of 88.9%.
