کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6630553 | 1424933 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Development of MgMnO3-δ as an oxygen carrier material for chemical looping combustion
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Chemical looping combustion (CLC) is attracting attention as a promising technology for carbon dioxide separation. Oxygen carrier materials are the most important factor in determining the efficiency of CLC. In this paper, we present MgMnO3-δ with a defect cubic spinel structure as an oxygen carrier material with high efficiency, low cost, and stable properties. MgMnO3-δ has a non-stoichiometric oxygen content of MgMnO2.68. The reduced composition of MgMnO3-δ in H2, CO, or CH4 is a complete solid solution of (Mg,Mn)O. The redox reaction from MgMnO3-δ to (Mg,Mn)O is reversible and stable. Interestingly, MgMnO3-δ also shows a chemical looping oxygen uncoupling (CLOU) phenomenon and is reduced to MgMn2O4 and MgO in N2 at 900â¯Â°C. The oxygen transfer capacities of MgMnO3-δ under 15% H2/N2, 15% CO/CO2, 15% CH4/N2, and 15% CH4/CO2 are 8.34, 8.56, 8.42, and 8.74â¯wt%, respectively, at 900â¯Â°C. The oxygen transfer capacity was well maintained during the 5th redox cycle. No phase or structure changes or agglomeration occurred as the redox cycle number increased. Moreover, MgMnO3-δ has a high tolerance to carbon deposition when used in CO or CH4 fuels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 231, 1 November 2018, Pages 290-296
Journal: Fuel - Volume 231, 1 November 2018, Pages 290-296
نویسندگان
Jong Ha Hwang, Jeom In Baek, Ho Jung Ryu, Jung Min Sohn, Ki-Tae Lee,