Hydrogen production by coupled catalytic partial oxidation and steam methane reforming at elevated pressure and temperature |
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Authors: | Luwei Chen Qi Hong Jianyi Lin F.M. Dautzenberg |
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Affiliation: | 1. Institute of Chemical and Engineering Science Ltd, 1 Pesek Road, Jurong Island, Singapore 627833, Singapore;2. ABB Lummus Global Inc, 1515 Broad Street, Bloomfield, NJ 07003, USA |
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Abstract: | Hydrogen production by coupled catalytic partial oxidation (CPO) and steam methane reforming of methane (OSMR) at industrial conditions (high temperatures and pressures) have been studied over supported 1 wt.% NiB catalysts. Mixture of air/CH4/H2O was applied as the feed. The effects of O2:CH4 ratio, H2O:CH4 ratio and the gas hourly space velocity (GHSV) on oxy-steam reforming (OSRM) were also studied. Results indicate that CH4 conversion increases significantly with increasing O2:CH4 or H2O:CH4 ratio. However, the hydrogen mole fraction goes through a maximum, depending on reaction conditions, e.g., pressure, temperature and the feed gases ratios. Carbon deposition on the catalysts has been greatly decreased after steam addition. The supported 1 wt.% NiB catalysts exhibit high stability with 85% methane conversion at 15 bar and 800 °C during 70 h time-on-stream reaction (CH4:O2:H2O:N2 = 1:0.5:1:1.887). The thermal efficiency was increased from 35.8% by CPO (without steam) to 55.6%. The presented data would be useful references for further design of enlarged scale hydrogen production system. |
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Keywords: | Hydrogen production Catalytic partial oxidation Steam reforming Methane Ni catalyst |
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