1 Ocak 2024 Dergi makalesi Açık Erişim

Altinsoy, N. Semih; Avci, Ahmet K.

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/278085</identifier>
  <creators>
    <creator>
      <creatorName>Altinsoy, N. Semih</creatorName>
      <givenName>N. Semih</givenName>
      <familyName>Altinsoy</familyName>
      <affiliation>Bogazici Univ, Dept Chem Engn, TR-34342 Istanbul, Turkiye</affiliation>
    </creator>
    <creator>
      <creatorName>Avci, Ahmet K.</creatorName>
      <givenName>Ahmet K.</givenName>
      <familyName>Avci</familyName>
      <affiliation>Bogazici Univ, Dept Chem Engn, TR-34342 Istanbul, Turkiye</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Sorption Enhanced Dme Synthesis By One-Step Co2 Hydrogenation</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2024</publicationYear>
  <dates>
    <date dateType="Issued">2024-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/278085</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.cep.2024.109874</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
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  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;DME synthesis by direct CO2 hydrogenation was studied on physical mixture of commercial Cu-ZnO/Al2O3 (CZA) and in-house synthesized PTA (phosphotungstic acid)/gamma-Al2O3 catalysts. Effects of PTA loading (0-50 % by mass) and relative amounts of the catalysts on CO2 conversion and DME yield were investigated. The process was intensified through integration of in-situ steam separation by Zeolite 3A (Z3A) adsorbent mixed with the catalysts. Experiments were run at 498 K, 30 bar, H2:CO2=3:1 and GHSV=1750 h-1 (based on CZA catalyst). Optimum PTA loading and CZA:PTA/gamma-Al2O3 mass ratio were 30 % and 1:2, respectively, that gave -21 % CO2 conversion and 6.3 % DME yield. These values remained below the respective thermodynamic limits (28.5 % and 21 %), which were exceeded upon adsorbent integration. Catalytic performance depended strongly on adsorbent quantity studied at the catalyst (CZA+PTA/gamma-Al2O3):adsorbent mass ratio range of 1:0.33-4. Catalysts and the adsorbent remained stable during the pressure swing driven adsorption-regeneration cycles. Sorption assistance at catalyst:adsorbent ratio=1:4 increased catalyst productivity from 5.5x10- 3 to 2x10- 2 kgDME h-1 kgcat - 1. The latter value was comparable to those of the sorption enhanced CO2+CO hydrogenation systems due to the PTAbased dehydration catalyst with strong acidic features and was promising when the strong thermodynamic limitations of CO2-DME conversion was considered.&lt;/p&gt;</description>
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