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Abstract:
Up to date, to design the efficient catalysts for CO2 reforming with ethanol is of great challenge due to the severe coke deposition. In this work, MOF derived CoCeOx nanocomposite (CoCe-MOF) with outstanding performance for ethanol dry reforming was successfully prepared. Indeed, the experimental results revealed that ethanol conversion was 97% with a H-2/CO ratio of ca.1 and negligible acetone formation (0.4 mol%) at 550 degrees C which was better than that of Co3O4/CeO2 synthesized by impregnation technique. Moreover, no obvious deactivation was observed even after 40 h time-on-stream tests for CoCe-MOF catalyst. Interestingly, ethanol conversion over CoCe-MOF slightly decreased from 99% to 96% while the value over Co3O4/CeO2 sample remarkably declined from 90% to 79% as well as the increase of byproduct formation (acetone from 1.1 mol% to 1.9 mol%). Particularly, the relationship between catalytic performance and morphology structure were investigated in detail by a series of characterization technique such as XRD, H-2-TPR, BET, XPS, TEM, Raman etc. The results demonstrated that the uniform aliovalent incorporation of Co into CeO2 framework greatly improved the physicochemical features of the CoCe-MOF catalyst including the generation of more oxygen defects/surface oxygen species (14,5% of Ce3+ species), stronger Co-O-Ce interaction, lower temperature reducibility etc. Hence, these positive factors might explain its high activity and stability. Eventually, this study might provide a simple method to develop the high-performance catalysts for dry reforming process and other heterogeneous catalytic reactions.
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Source :
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
ISSN: 2213-2929
Year: 2022
Issue: 3
Volume: 10
7 . 7
JCR@2022
7 . 7 0 0
JCR@2022
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 18
SCOPUS Cited Count: 19
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 5
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