Natural gas steam reforming reaction at low temperature and pressure conditions for hydrogen production via Pd/PSS membrane reactor
| Autor: | Simona Liguori, Bryce H. Anzelmo, Jennifer Wilcox |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Chromatography
Membrane reactor Hydrogen business.industry chemistry.chemical_element Filtration and Separation 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Methane 0104 chemical sciences Catalysis Steam reforming chemistry.chemical_compound chemistry Chemical engineering Natural gas General Materials Science Physical and Theoretical Chemistry 0210 nano-technology business Hydrogen production Space velocity |
| Zdroj: | Journal of Membrane Science. 522:343-350 |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/j.memsci.2016.09.029 |
| Popis: | The objective of this work is to analyze the performance of a composite palladium-based membrane reactor (MR) by performing the natural gas steam reforming reaction at low operating conditions for producing high-purity hydrogen. The MR comprises a composite membrane, having ~13 µm Pd layer deposited on a porous stainless steel support, fabricated via electroless plating and a commercial Ni-based catalyst. The composite membrane shows infinite ideal selectivity, H 2 /He and H 2 /Ar, at trans-membrane pressures less than 100 kPa and T=400 °C at the onset of experimental testing. The steam reforming reaction is performed at 400 °C, by varying the reaction pressures and sweep gas flow rate between 150 kPa and 300 kPa, and 0–100 mL/min, respectively. The gas hourly space velocity (GHSV) and steam-to-carbon ratio (S/C) are kept constant at 2600 h −1 and 3.5. The effect of CO 2 as an impurity in the feed line is also analyzed at 400 °C and 150 kPa. The best performance of the Pd-based MR is obtained at 400 °C, 300 kPa and 100 mL/min of sweep-gas, yielding a methane conversion of 84%, hydrogen recovery of 82%, and obtaining a pure hydrogen stream at the permeate side. The Pd/PSS MR worked for more than 700 h under differing operating conditions. As a comparison, a conventional reactor operating at the same MR conditions is compared and discussed. |
| Databáze: | OpenAIRE |
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