Effect of supercritical water on redox cycle capability of iron oxide duringdecomposition of formic acid
Publish place: 12th annual electrochemical seminar of Iran
Publish Year: 1395
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ELECTROCHEMISTRY012_187
تاریخ نمایه سازی: 5 آذر 1397
Abstract:
Formic acid (FA) has great potential as an in situ source of hydrogen, because it offers highenergy density, and can be safely handled in aqueous solution. In the current study,decomposition of formic acid (H2+CO2←HCOOH→CO+H2O) was investigated in thesupercritical water (W) medium over iron oxide nanoparticle in order to shift the conversiontoward more hydrogen production through water-gas shift reaction (CO+ H2O↔ H2+ CO2). Thisreaction can be accelerated through the redox mechanism (Fe+3↔Fe2+) in which supercriticalwater has a positive effect on this cycle. The effects of parameters (temperature, water densityand FA/W ratio) were investigated on the catalyst structure and gas composition. From X-raydiffraction (XRD), electron diffraction (ED) analysis of catalyst as well as gas chromatographicanalysis (GC) of gas composition (CO, CO2, H2, CH4), it was revealed that water pressure haspositive effect on stability of catalyst and modification of selectivity toward more H2 production.The pathway of the reaction can be seen at the following.
Keywords:
Authors
Morteza Hosseinpour
School of Chemical Engineering, University of Tehran, Tehran, Iran
Shohreh Fatemi
School of Chemical Engineering, University of Tehran, Tehran, Iran
Seyed Javad Ahmadi
Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran