1 Ocak 2024 Dergi makalesi Açık Erişim

Altinsoy, N. Semih; Avci, Ahmet K.

MARC21 XML

<?xml version='1.0' encoding='UTF-8'?>
<record xmlns="http://www.loc.gov/MARC21/slim">
  <leader>00000nam##2200000uu#4500</leader>
  <datafield tag="909" ind1="C" ind2="O">
    <subfield code="p">user-tubitak-destekli-proje-yayinlari</subfield>
    <subfield code="o">oai:aperta.ulakbim.gov.tr:278085</subfield>
  </datafield>
  <datafield tag="520" ind1=" " ind2=" ">
    <subfield code="a">&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;</subfield>
  </datafield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">publication</subfield>
    <subfield code="b">article</subfield>
  </datafield>
  <datafield tag="540" ind1=" " ind2=" ">
    <subfield code="a">Creative Commons Attribution</subfield>
    <subfield code="u">http://www.opendefinition.org/licenses/cc-by</subfield>
  </datafield>
  <datafield tag="100" ind1=" " ind2=" ">
    <subfield code="a">Altinsoy, N. Semih</subfield>
    <subfield code="u">Bogazici Univ, Dept Chem Engn, TR-34342 Istanbul, Turkiye</subfield>
  </datafield>
  <datafield tag="856" ind1="4" ind2=" ">
    <subfield code="z">md5:92a0e087a26c29eea95c9cf00db6c1d2</subfield>
    <subfield code="s">175</subfield>
    <subfield code="u">https://aperta.ulakbim.gov.trrecord/278085/files/bib-6ea6e072-7b12-442c-bcfc-b1f828095e8f.txt</subfield>
  </datafield>
  <controlfield tag="005">20250417170415.0</controlfield>
  <datafield tag="260" ind1=" " ind2=" ">
    <subfield code="c">2024-01-01</subfield>
  </datafield>
  <datafield tag="024" ind1=" " ind2=" ">
    <subfield code="a">10.1016/j.cep.2024.109874</subfield>
    <subfield code="2">doi</subfield>
  </datafield>
  <datafield tag="542" ind1=" " ind2=" ">
    <subfield code="l">open</subfield>
  </datafield>
  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">Sorption enhanced DME synthesis by one-step CO2 hydrogenation</subfield>
  </datafield>
  <datafield tag="909" ind1="C" ind2="4">
    <subfield code="v">203</subfield>
    <subfield code="c">8</subfield>
    <subfield code="p">CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION</subfield>
  </datafield>
  <datafield tag="650" ind1="1" ind2="7">
    <subfield code="a">cc-by</subfield>
    <subfield code="2">opendefinition.org</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Avci, Ahmet K.</subfield>
    <subfield code="u">Bogazici Univ, Dept Chem Engn, TR-34342 Istanbul, Turkiye</subfield>
  </datafield>
  <controlfield tag="001">278085</controlfield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">user-tubitak-destekli-proje-yayinlari</subfield>
  </datafield>
</record>