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    Microporous Cokes Formed in Zeolite Catalysts Enable Efficient Solar Evaporation

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    Type
    Article
    Authors
    Wang, Jianjian cc
    Liu, Zhaohui cc
    Dong, Xinglong cc
    Hsiung, Chia-En
    Zhu, Yihan
    Liu, Lingmei
    Han, Yu cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Science Program
    Nanostructured Functional Materials (NFM) laboratory
    Physical Science and Engineering (PSE) Division
    Date
    2017
    Permanent link to this record
    http://hdl.handle.net/10754/623039
    
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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 cokederived carbons possessed ordered interconnected pores and tunable compositions. We found that the porous structure and the oxygen content in as-prepared carbons had important influences on their energy conversion efficiencies. Among various investigated carbon materials, the carbon derived from the methanol-to-olefins reaction over zeolite Beta gave the highest conversion efficiency of 72% under simulated sunlight with 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.
    Citation
    Wang J, Liu Z, Dong X, Hsiung C-E, Zhu Y, et al. (2017) Microporous Cokes Formed in Zeolite Catalysts Enable Efficient Solar Evaporation. J Mater Chem A. Available: http://dx.doi.org/10.1039/c7ta00882a.
    Sponsors
    This work is supported by the CCF grants from Advanced Membranes and Porous Materials Center (AMPMC) and KAUST Solar Center (KSC) at King Abdullah University of Science and Technology. Yu Han thanks the Key international science and technology cooperation project of Hainan province (kjhz2014-08) for supporting a meeting for initial discussions.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Journal of Materials Chemistry A
    DOI
    10.1039/c7ta00882a
    Additional Links
    http://pubs.rsc.org/en/Content/ArticleLanding/2017/TA/C7TA00882A#!divAbstract
    ae974a485f413a2113503eed53cd6c53
    10.1039/c7ta00882a
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Science Program

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