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Issue 15, 2017
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Microporous cokes formed in zeolite catalysts enable efficient solar evaporation

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Abstract

Cokes are inevitably generated during zeolite-catalyzed reactions as deleterious side products that deactivate the catalyst. In this study, we in situ converted cokes into carbons within the confined microporous zeolite structures and evaluated their performances as absorbing materials for solar-driven water evaporation. With a properly chosen zeolite, the coke-derived carbons possessed ordered interconnected pores and tunable compositions. We found that the porous structure and the oxygen content in the as-prepared carbons had important influences on their energy conversion efficiencies. Among various investigated carbon materials, the carbon derived from the methanol-to-olefin reaction over zeolite beta gave the highest conversion efficiency of 72% under simulated sunlight with an equivalent solar intensity of 2 suns. This study not only demonstrates the great potential of traditionally useless cokes for solar thermal applications but also provides new insights into the design of carbon-based absorbing materials for efficient solar evaporation.

Graphical abstract: Microporous cokes formed in zeolite catalysts enable efficient solar evaporation

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Publication details

The article was received on 26 Jan 2017, accepted on 13 Mar 2017 and first published on 13 Mar 2017


Article type: Paper
DOI: 10.1039/C7TA00882A
Citation: J. Mater. Chem. A, 2017,5, 6860-6865
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    Microporous cokes formed in zeolite catalysts enable efficient solar evaporation

    J. Wang, Z. Liu, X. Dong, C. Hsiung, Y. Zhu, L. Liu and Y. Han, J. Mater. Chem. A, 2017, 5, 6860
    DOI: 10.1039/C7TA00882A

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