Testing of a highly reactive impregnated Fe<sub>2sub>O<sub>3sub>/Al<sub>2sub>O<sub>3sub> oxygen carrier for a SR-CLC system in a continuous CLC unit

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• 作者：Pilar Gay&aacute ; n<sup> ; sup><sup>pgayan@icb.csic.essup> ; Miguel A. Pans ; Marí ; a Ortiz ; Alberto Abad ; Luis F. de Diego ; Francisco Garcí ; a-Labiano ; Juan Ad&aacute ; nez
• 关键词：Hydrogen ; Steam reforming ; Chemical looping combustion ; CO2 capture ; Oxygen carrier ; Iron oxide
• 刊名：Fuel Processing Technology
• 出版年：2012
• 期刊代码：36_03783820
• 类别：ce
• 出版时间：April, 2012
• 卷：96
• 期：Complete
• 页码：37-47
• 文件大小：2381 K

摘要

A Fe鈥恇ased oxygen carrier (OC) was evaluated for H<sub>2sub> production with CO<sub>2sub> capture by coupling steam reforming of methane and chemical鈥恖ooping combustion (CLC) processes (SR-CLC). The CLC system supplies the heat necessary to carry out the endothermic reformed reactions, using the PSA off鈥恎as as fuel. The Fe鈥恇ased OC was made by incipient hot impregnation using Al<sub>2sub>O<sub>3sub> as support and was first characterized by TGA and batch fluidized bed reactor in order to determine its reactivity and its fluidization behavior. The OC behavior in a continuous CLC unit was evaluated using a simulated PSA off鈥恎as and methane as fuels. During 46 h of continuous operation, the OC never showed agglomeration or carbon deposition, and the attrition was moderate. It was found that the fuel composition has low effect on the combustion efficiency and full conversion can be obtained at 1153 K with an oxygen carrier鈥恡o鈥恌uel ratio > 1.5. The solids inventory needed to fully convert methane or PSA off鈥恎as was lower than those found with other Fe鈥恇ased materials. These results were due to the positive effect of the alumina on the OC reactivity. Therefore, the Fe<sub>2sub>O<sub>3sub>/Al<sub>2sub>O<sub>3sub> OC prepared by impregnation is suitable for burning a PSA off鈥恎as in the SR-CLC process.