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摘要:
This work is mainly concerned with the synthesis of Co-Zn nanocomposites by employing MCM-41 silica as hard template (CoZnO-HT) and its catalytic behavior toward to CO2 reforming with ethanol. The physicochemical features of the as-prepared catalysts were probed through various characterization techniques, including XRD, TEM, BET, H-2-TPR, and XPS. Indeed, CoZnO-HT catalyst possessed a highly ordered mesostructure with similarity to MCM-41 template and a higher specific surface area (304 m(2)/g) compared to the reference CoZnO-C sample (4.75 m(2)/g) prepared by the conventional impregnation method. Consequently, CoZnO-HT exhibited good performance at low temperature, and full ethanol conversion could be achieved at 550 degrees C as well as the negligible formation of byproduct acetone. In addition, this catalyst depicted good stability and no obvious deactivation was observed after 40 h time on stream tests under the stoichiometric feed ratio. Indeed, superior specific surface area and efficient mass transport within the mesopores might be critical factors assigned to better activity and stability for CoZnO-HT.
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来源 :
KOREAN JOURNAL OF CHEMICAL ENGINEERING
ISSN: 0256-1115
年份: 2022
期: 7
卷: 39
页码: 1744-1752
2 . 7
JCR@2022
2 . 7 0 0
JCR@2022
ESI学科: CHEMISTRY;
ESI高被引阀值:53
JCR分区:3
中科院分区:4
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