1 Ocak 2022 Dergi makalesi Açık Erişim

Koybasi, H. Hasan; Avci, Ahmet K.

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{
  "@context": "https://schema.org/", 
  "@id": 262343, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "Bogazici Univ, Dept Chem Engn, TR-34342 Istanbul, Turkey", 
      "name": "Koybasi, H. Hasan"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Bogazici Univ, Dept Chem Engn, TR-34342 Istanbul, Turkey", 
      "name": "Avci, Ahmet K."
    }
  ], 
  "datePublished": "2022-01-01", 
  "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.", 
  "headline": "Numerical Analysis of CO2-to-DME Conversion in a Membrane Microchannel Reactor", 
  "identifier": 262343, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Numerical Analysis of CO2-to-DME Conversion in a Membrane Microchannel Reactor", 
  "url": "https://aperta.ulakbim.gov.tr/record/262343"
}