1 Ocak 2022 Dergi makalesi Açık Erişim

Koybasi, H. Hasan; Avci, Ahmet K.

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  <dc:creator>Koybasi, H. Hasan</dc:creator>
  <dc:creator>Avci, Ahmet K.</dc:creator>
  <dc:date>2022-01-01</dc:date>
  <dc:description>Direct DME synthesis via CO2 hydrogenation in a membrane-integrated microchannel reactor is modeled. The proposed reactor comprises rectangular permeate and reaction channels separated by layers of sodalite membranes, permitting only H2O and H-2 transport. Reaction channels, dosed with CO2 and H-2, are washcoated with a physical mixture of methanol synthesis (Cu-ZnO/Al2O3 (CZA)) and dehydration (HZSM-5) catalysts. Pure H-2-fed permeate channels host the steam transported from reaction channels. The mathematical model of the isothermal, steady-state reactor involves conservation equations in catalyst and fluid phases, catalytic reactions, and membrane separation. The model is successfully benchmarked against literature-based experimental data. Differences between isothermal and non-isothermal models remain negligible. At 543 K, 50 bar, and H-2/CO2 = 3, cross-membrane H2O and H-2 transport increases membraneless CO2 conversion and DME yield values by more than 2-fold, i.e., up to similar to 73 and similar to 35%, respectively. Counter-current flow configuration offers more H2O separation than the co-current one. The sweep-to-reactive stream inlet velocity ratio affects cross-membrane mass transfer significantly. Reactor performance is positively correlated with the CZA/HZSM-5 mass ratio. A similar to 7 m(3)-sized reactor can transform similar to 1 x 10(3) tons/year of CO2 into 2.76 x 10(2) tons/year of DME.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/262343</dc:identifier>
  <dc:identifier>oai:aperta.ulakbim.gov.tr:262343</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>INDUSTRIAL &amp; ENGINEERING CHEMISTRY RESEARCH 61(30) 10846-10859</dc:source>
  <dc:title>Numerical Analysis of CO2-to-DME Conversion in a Membrane Microchannel Reactor</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
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