Open AccessSynthesis of metal oxide-hierarchical ZSM-5 (CO3O4/ZSM-5 and Fe2O3/ZSM-5) as catalysts for partial oxidation of biomethane to methanol
Author(s) -
Arbhyando T. Putrananda,
D. A. Nurani,
Yuni Krisyuningsih Krisnandi
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/763/1/012029
Subject(s) - zsm 5 , methanol , cobalt oxide , catalysis , cobalt , materials science , inorganic chemistry , incipient wetness impregnation , partial oxidation , oxide , fourier transform infrared spectroscopy , nuclear chemistry , chemistry , chemical engineering , zeolite , organic chemistry , metallurgy , selectivity , engineering
This study presents a partial oxidation of biomethane from anaerobic organic waste of cow dung (83.7 % of methane and 16.3 % of oxygen) to methanol using modified cobalt and iron metal oxide-hierarchical ZSM-5 catalysts. Hierarchical ZSM-5 was synthesized using double template methods with tetrapropylammonium hydroxide (TPAOH) and dimethyl diallyl ammonium chloride acrylamide copolymer (PDDAM) as the first and secondary templates, respectively. The as-synthesized ZSM-5 materials were characterized with Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy (SEM-EDS), Fourier Transform Infrared (FTIR), X-Ray Diffraction (XRD), and the results show the similarities of physicochemical properties with standard ZSM-5 materials. The hierarchical ZSM-5 was then modified with cobalt or iron oxides through impregnation with incipient wetness. The results of XPS analysis show that the impregnated cobalt and iron metal oxide are Co 3 O 4 and Fe 2 O 3 , respectively. While the AAS analysis indicates that the metal content in Co 3 O 4 /ZSM-5 and Fe 2 O 3 /ZSM-5 are 2.1 % (Co) and 2.4 % (Fe), respectively. The partial oxidation of bio-methane to methanol was carried out in an atmospheric fixed batch reactor, c.a. 200 mL, with biomethane to N 2 ratio of 0,2:2 (in bar). The results of application using biomethane show the hierarchical Fe 2 O 3 /ZSM-5 catalyst has higher methanol yield (17.61 %), compared to the yield by using hierarchical Co 3 O 4 /ZSM-5 (10.99 %). In addition, no side product is detected after reaction. Thus, it can be concluded that Fe 2 O 3 is more active than Co 3 O 4 as catalyst and biomethane can be utilized as source in this partial oxidation reaction.