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The use of metal nitrate-modified amorphous nano silica for synthesizing solid amine CO2 adsorbents with resistance to urea linkage formation.

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Title: The use of metal nitrate-modified amorphous nano silica for synthesizing solid amine CO2 adsorbents with resistance to urea linkage formation.
Authors: Li, Kai Min1 (AUTHOR) likaimin16@gmail.com, Lu, Lu1 (AUTHOR), Xu, Yu Rong1 (AUTHOR), Jia, Si Yuan1 (AUTHOR), Zhang, Zhen Qi2 (AUTHOR), Qi, Zhong Bao2 (AUTHOR), Wei, Shu Ya1 (AUTHOR)
Source: International Journal of Greenhouse Gas Control. Mar2021, Vol. 106, pN.PAG-N.PAG. 1p.
Subject Terms: *Sorbents, *Urea, *Carbon dioxide, Metallic glasses, Polyethyleneimine, Silica
Abstract: • A facile method was developed for synthesizing solid amine CO 2 adsorbents with resistance to urea linkage formation. • Metal nitrates-modified-amorphous nano SiO 2 supported polyethyleneimine significantly inhibited urea linkage formation. • The addition of metal nitrates into amorphous nano SiO 2 enhanced the H 2 O binding ability of SiO 2 at 130 °C. The formation of urea linkages is a limitation to the application of solid amine CO 2 adsorbents. Therefore, the development of solid amine adsorbents with resistance to urea linkage formation has attracted much interest over the last 5 years. In this study, we developed a facile method for synthesizing solid amine adsorbents with effective resistance to urea linkage formation. For the first time, metal nitrates were used to modify amorphous nano SiO 2 to support polyethyleneimine (PEI). Three metal nitrates were investigated: aluminum, magnesium, and zinc nitrates. A series of adsorbents were prepared by controlling the mass ratios of metal nitrates and nano SiO 2. After 50 cycles of adsorption–desorption tests, adsorbing at 75 °C under 15 % CO 2 balanced with N 2 and desorbing at 130 °C under pure CO 2 , Al-20%@SiO 2 -PEI, Al-15%@SiO 2 -PEI, Al-10%@SiO 2 -PEI, Zn-10%@SiO 2 -PEI, and Mg-10%@SiO 2 -PEI lost only 2.6 %, 4.0 %, 5.2 %, 15.9 %, and 28.8 % of their original CO 2 adsorption capacities, respectively. However, SiO 2 -PEI, calcined SiO 2 -PEI, and Al-5%@SiO 2 -PEI lost 42.9 %, 48.6 %, and 49.6 %, respectively. By combining the infrared spectra of all the adsorbents through cyclic adsorption–desorption tests, inhibitory effects on urea linkage formation were proven for Al-20%@SiO 2 -PEI, Al-15%@SiO 2 -PEI, Zn-10%@SiO 2 -PEI, and Mg-10%@SiO 2 -PEI, and especially for Al-10%@SiO 2 -PEI. Through a relatively comprehensive analysis, we found that a desirable amount of metal nitrates could modify nano SiO 2 samples and their corresponding adsorbents possessed a stronger H 2 O binding ability at 130 °C. The retained H 2 O could act as an inhibiting agent for the inhibition of urea linkage formation. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Greenhouse Gas Control is the property of Elsevier B.V. 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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Items – Name: Title
  Label: Title
  Group: Ti
  Data: The use of metal nitrate-modified amorphous nano silica for synthesizing solid amine CO2 adsorbents with resistance to urea linkage formation.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Kai+Min%22">Li, Kai Min</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> likaimin16@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Lu%2C+Lu%22">Lu, Lu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Yu+Rong%22">Xu, Yu Rong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jia%2C+Si+Yuan%22">Jia, Si Yuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Zhen+Qi%22">Zhang, Zhen Qi</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Qi%2C+Zhong+Bao%22">Qi, Zhong Bao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wei%2C+Shu+Ya%22">Wei, Shu Ya</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Greenhouse+Gas+Control%22">International Journal of Greenhouse Gas Control</searchLink>. Mar2021, Vol. 106, pN.PAG-N.PAG. 1p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Sorbents%22">Sorbents</searchLink><br />*<searchLink fieldCode="DE" term="%22Urea%22">Urea</searchLink><br />*<searchLink fieldCode="DE" term="%22Carbon+dioxide%22">Carbon dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Metallic+glasses%22">Metallic glasses</searchLink><br /><searchLink fieldCode="DE" term="%22Polyethyleneimine%22">Polyethyleneimine</searchLink><br /><searchLink fieldCode="DE" term="%22Silica%22">Silica</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • A facile method was developed for synthesizing solid amine CO 2 adsorbents with resistance to urea linkage formation. • Metal nitrates-modified-amorphous nano SiO 2 supported polyethyleneimine significantly inhibited urea linkage formation. • The addition of metal nitrates into amorphous nano SiO 2 enhanced the H 2 O binding ability of SiO 2 at 130 °C. The formation of urea linkages is a limitation to the application of solid amine CO 2 adsorbents. Therefore, the development of solid amine adsorbents with resistance to urea linkage formation has attracted much interest over the last 5 years. In this study, we developed a facile method for synthesizing solid amine adsorbents with effective resistance to urea linkage formation. For the first time, metal nitrates were used to modify amorphous nano SiO 2 to support polyethyleneimine (PEI). Three metal nitrates were investigated: aluminum, magnesium, and zinc nitrates. A series of adsorbents were prepared by controlling the mass ratios of metal nitrates and nano SiO 2. After 50 cycles of adsorption–desorption tests, adsorbing at 75 °C under 15 % CO 2 balanced with N 2 and desorbing at 130 °C under pure CO 2 , Al-20%@SiO 2 -PEI, Al-15%@SiO 2 -PEI, Al-10%@SiO 2 -PEI, Zn-10%@SiO 2 -PEI, and Mg-10%@SiO 2 -PEI lost only 2.6 %, 4.0 %, 5.2 %, 15.9 %, and 28.8 % of their original CO 2 adsorption capacities, respectively. However, SiO 2 -PEI, calcined SiO 2 -PEI, and Al-5%@SiO 2 -PEI lost 42.9 %, 48.6 %, and 49.6 %, respectively. By combining the infrared spectra of all the adsorbents through cyclic adsorption–desorption tests, inhibitory effects on urea linkage formation were proven for Al-20%@SiO 2 -PEI, Al-15%@SiO 2 -PEI, Zn-10%@SiO 2 -PEI, and Mg-10%@SiO 2 -PEI, and especially for Al-10%@SiO 2 -PEI. Through a relatively comprehensive analysis, we found that a desirable amount of metal nitrates could modify nano SiO 2 samples and their corresponding adsorbents possessed a stronger H 2 O binding ability at 130 °C. The retained H 2 O could act as an inhibiting agent for the inhibition of urea linkage formation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Greenhouse Gas Control is the property of Elsevier B.V. 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.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ijggc.2021.103289
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Sorbents
        Type: general
      – SubjectFull: Urea
        Type: general
      – SubjectFull: Carbon dioxide
        Type: general
      – SubjectFull: Metallic glasses
        Type: general
      – SubjectFull: Polyethyleneimine
        Type: general
      – SubjectFull: Silica
        Type: general
    Titles:
      – TitleFull: The use of metal nitrate-modified amorphous nano silica for synthesizing solid amine CO2 adsorbents with resistance to urea linkage formation.
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            NameFull: Li, Kai Min
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            NameFull: Lu, Lu
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            NameFull: Xu, Yu Rong
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            NameFull: Zhang, Zhen Qi
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            – D: 01
              M: 03
              Text: Mar2021
              Type: published
              Y: 2021
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              Value: 106
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            – TitleFull: International Journal of Greenhouse Gas Control
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