Effect of Promoter MgO on CeO2/Al2O3 Oxygen Carrier Used in Partial Oxidation of Methane to Syngas
首发时间:2007-12-21
Abstract:Promoter MgO on 10%CeO2/Al2O3 oxygen carrier was investigated for direct partial oxidation of methane to syngas in molten salt. The contents of 0.5%, 1%, 2%, 3% and 4%MgO on the 10%CeO2/ Al2O3 oxygen carriers in experiments were prepared at the temperature of 750℃, respectively. The methane conversion, H2 and CO selectivity were measured on these prepared oxygen carriers at different reaction temperatures. The results showed that the 3% MgO on 10%CeO2/Al2O3 had the best activity, and the CH4 conversion and CO selectivity reached 92.58% and 87.64% at 875℃, respectively. The effect of different preparation temperatures on 3% MgO as promoter on 10%CeO2/Al2O3 oxygen carrier was investigated. The results of BET indicated that 3% MgO as promoter had the largest surface area at 750℃, and the results also indicated that (and)the higher calcined temperature had a negative effect on oxygen carrier activity.
keywords: methane partial oxidation syngas molten salt rare earths
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Effect of Promoter MgO on CeO2/Al2O3 Oxygen Carrier Used in Partial Oxidation of Methane to Syngas
摘要:Promoter MgO on 10%CeO2/Al2O3 oxygen carrier was investigated for direct partial oxidation of methane to syngas in molten salt. The contents of 0.5%, 1%, 2%, 3% and 4%MgO on the 10%CeO2/ Al2O3 oxygen carriers in experiments were prepared at the temperature of 750℃, respectively. The methane conversion, H2 and CO selectivity were measured on these prepared oxygen carriers at different reaction temperatures. The results showed that the 3% MgO on 10%CeO2/Al2O3 had the best activity, and the CH4 conversion and CO selectivity reached 92.58% and 87.64% at 875℃, respectively. The effect of different preparation temperatures on 3% MgO as promoter on 10%CeO2/Al2O3 oxygen carrier was investigated. The results of BET indicated that 3% MgO as promoter had the largest surface area at 750℃, and the results also indicated that (and)the higher calcined temperature had a negative effect on oxygen carrier activity.
关键词: methane; partial oxidation; syngas; molten salt; rare earths
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No.1722417866611982****
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