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INVESTIGATION OF WATER-VAPOR ADSORPTION ONTO METAL-ORGANIC FRAMEWORKS (MOFS) FOR GREENHOUSE AIR-CONDITIONING APPLICATION.

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Title: INVESTIGATION OF WATER-VAPOR ADSORPTION ONTO METAL-ORGANIC FRAMEWORKS (MOFS) FOR GREENHOUSE AIR-CONDITIONING APPLICATION.
Authors: Ashraf, Sahrish1, Sultan, Muhammad1, Hussain, Ghulam1,2, Noor, Shazia1,3, Ashraf, Hadeed1, Takahiko Miyazaki4, Shamshiri, Redmond R.5 rshamshiri@atb-potsdam.de, Kanwal, Rabia6, Mahmood, Muhammad H.1, Taseer, Yousaf R.7, Niaz, Yasir8
Source: Fresenius Environmental Bulletin. Jun2021, Vol. 30 Issue 6B, p7375-7383. 9p.
Subject Terms: *Adsorption (Chemistry), *Greenhouses, Drying agents, Metal-organic frameworks, Physisorption, Adsorption isotherms, Water vapor
Abstract: Metal-organic frameworks (MOFs) are providing a new class of organic desiccant materials that possess interesting physical and adsorption characteristics. In this study, MOFs of type (i) HKUST-1, (ii) CPO-27(Ni), (iii) MIL-101(Cr) and (iv) MIL-53), are studied for greenhouse desiccant air-conditioning application. Water vapor adsorption equilibrium data of the MOFs are obtained from the literature. The adsorption equilibrium models of Dubinin-Astakhov (D-A) and Guggnheim-Anderson-de Boer (GAB) are used to represent the adsorption uptake data, and thereby adsorption isotherms are developed for various temperatures. Optimized parameters of the models are provided accordingly. Among the studied MOFs, the MIL-101(Cr) shows the highest water vapor adsorption uptake of 1.45 kg/kg at a relative pressure of 0.90 and temperature of 25°C. The CPO-27(Ni) exhibits type-I adsorption isotherm according to IUPAC classification. Greenhouse airconditioning application is studied for three demand categories based on required relative humidity of 60%, 40%, and 20%. Steady-state moisture cycled by the MOF based desiccant system is estimated. It has been found that different MOF adsorbents provide optimum desiccant unit based on available regeneration temperature. Results showed that the CPO-27(Ni) is not found applicable for required RH < 20%, whereas, MIL-101(Cr) and MIL-53 are applicable for all RH ranges. [ABSTRACT FROM AUTHOR]
Copyright of Fresenius Environmental Bulletin is the property of PRT-Parlar Research & Technology and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: INVESTIGATION OF WATER-VAPOR ADSORPTION ONTO METAL-ORGANIC FRAMEWORKS (MOFS) FOR GREENHOUSE AIR-CONDITIONING APPLICATION.
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Fresenius+Environmental+Bulletin%22&quot;&gt;Fresenius Environmental Bulletin&lt;/searchLink&gt;. Jun2021, Vol. 30 Issue 6B, p7375-7383. 9p.
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  Data: Metal-organic frameworks (MOFs) are providing a new class of organic desiccant materials that possess interesting physical and adsorption characteristics. In this study, MOFs of type (i) HKUST-1, (ii) CPO-27(Ni), (iii) MIL-101(Cr) and (iv) MIL-53), are studied for greenhouse desiccant air-conditioning application. Water vapor adsorption equilibrium data of the MOFs are obtained from the literature. The adsorption equilibrium models of Dubinin-Astakhov (D-A) and Guggnheim-Anderson-de Boer (GAB) are used to represent the adsorption uptake data, and thereby adsorption isotherms are developed for various temperatures. Optimized parameters of the models are provided accordingly. Among the studied MOFs, the MIL-101(Cr) shows the highest water vapor adsorption uptake of 1.45 kg/kg at a relative pressure of 0.90 and temperature of 25&#176;C. The CPO-27(Ni) exhibits type-I adsorption isotherm according to IUPAC classification. Greenhouse airconditioning application is studied for three demand categories based on required relative humidity of 60%, 40%, and 20%. Steady-state moisture cycled by the MOF based desiccant system is estimated. It has been found that different MOF adsorbents provide optimum desiccant unit based on available regeneration temperature. Results showed that the CPO-27(Ni) is not found applicable for required RH &lt; 20%, whereas, MIL-101(Cr) and MIL-53 are applicable for all RH ranges. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Fresenius Environmental Bulletin is the property of PRT-Parlar Research &amp; Technology and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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      – Code: eng
        Text: English
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        PageCount: 9
        StartPage: 7375
    Subjects:
      – SubjectFull: Adsorption (Chemistry)
        Type: general
      – SubjectFull: Greenhouses
        Type: general
      – SubjectFull: Drying agents
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      – SubjectFull: Metal-organic frameworks
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      – SubjectFull: Physisorption
        Type: general
      – SubjectFull: Adsorption isotherms
        Type: general
      – SubjectFull: Water vapor
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      – TitleFull: INVESTIGATION OF WATER-VAPOR ADSORPTION ONTO METAL-ORGANIC FRAMEWORKS (MOFS) FOR GREENHOUSE AIR-CONDITIONING APPLICATION.
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              Text: Jun2021
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