4.6 Article

Sol-Gel Synthesis and Characterization of the Cu-Mg-O System for Chemical Looping Application

期刊

MATERIALS
卷 15, 期 6, 页码 -

出版社

MDPI
DOI: 10.3390/ma15062021

关键词

sol-gel synthesis; magnesium oxide matrix; copper oxide; chemical looping; reduction; oxidation cycling

资金

  1. Ministry of Science and Higher Education of the Russian Federation [AAAA-A21-121011390054-1]

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A sol-gel technique was used to prepare a two-component Cu-Mg-O oxide system, and its properties were characterized. The presence of MgO matrix was found to significantly affect the reduction and re-oxidation ability of CuO. After three cycles, the system exhibited stable operation and absorbed similar amounts of hydrogen within the same temperature range. These results suggest that the Cu-Mg-O system has potential as a chemical looping agent.
A sol-gel technique was applied to prepare the two-component oxide system Cu-Mg-O, where MgO plays the role of oxide matrix, and CuO is an active chemical looping component. The prepared samples were characterized by scanning electron microscopy, low-temperature nitrogen adsorption, and X-ray diffraction analysis. The reduction behavior of the Cu-Mg-O system was examined in nine consecutive reduction/oxidation cycles. The presence of the MgO matrix was shown to affect the ability of CuO towards reduction and re-oxidation significantly. During the first reduction/oxidation cycle, the main characteristics of the oxide system (particle size, crystallization degree, etc.) undergo noticeable changes. Starting from the third cycle, the system exhibits a stable operation, providing the uptake of similar hydrogen amounts within the same temperature range. Based on the obtained results, the two-component Cu-Mg-O system can be considered as a prospective chemical looping agent.

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