کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1515001 | 1511229 | 2011 | 8 صفحه PDF | دانلود رایگان |
In chemical-looping auto-thermal reforming (CLRa), hydrogen is produced without the need of an exterior heat supply. Thus, an important aspect to be considered in the design of a CLRa system is the heat balance. In this work, mass and heat balances have been done to determine the auto-thermal operating conditions that maximize H2 production in a CLRa system working with a Ni-based oxygen carrier with a 20 wt % of active metal oxide (NiO). It was found that the oxygen-to-methane molar ratio should be higher than 1.25 to reach auto-thermal conditions, which means that the H2 yield is 2.7 mol H2/mol CH4. The control of the oxygen-to-methane ratio by the air flow to the air-reactor was preferred against controlling the oxygen transferred by the solids circulation rate because a lower excess of air was needed in the first case to reach auto-thermal conditions.
Journal: Energy Procedia - Volume 4, 2011, Pages 425-432