Simultaneous CO 2 and O 2 separation coupled to oxy-dry reforming of CH 4 by means of a ceramic-carbonate membrane reactor for in situ syngas production J.A. Fabián-Anguiano a , C.G. Mendoza-Serrato a , C. Gómez-Yáñez a , B. Zeifert a , Xiaoli Ma b , J. Ortiz-Landeros a,⇑ a Instituto Politécnico Nacional, Escuela Superior de Ingeniería Química e Industrias Extractivas, Departamento de Ingeniería en Metalurgia y Materiales, UPALM-Zacatenco, IPN Avenue, Mexico City 07738, Mexico b Department of Materials Science and Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA highlights  Novel ceramic-carbonate membrane exhibiting simultaneous CO 2 and O 2 permeation.  High permeation flux (JCO 2 + JO 2 ) of 5.9  10 7 mol∙m 2 ∙s 1 ∙Pa 1 at 875 °C.  Membranes were successfully coupled with the oxy-dry reforming of methane reaction.  Total conversion of CO 2 and O 2 is achieved by packing the reactor with a reforming catalyst. graphical abstract article info Article history: Received 13 July 2019 Received in revised form 23 September 2019 Accepted 26 September 2019 Available online 26 September 2019 Keywords: Inorganic membrane Gas permeation Ceramic-carbonate membrane Oxy-CO 2 reforming of methane Syngas production abstract It is reported the use of a ceramic-carbonate membrane exhibiting CO 2 and O 2 permeation, coupled with the oxy-carbon dioxide reforming of methane to produce syngas in a membrane reactor arrangement. The studied membrane is made of a porous fluorite/perovskite mixed conducting ceramic infiltrated with molten carbonates. The CO 2 and O 2 gas mixture used to perform the oxy-dry reforming process is the membrane’s permeate, which reacts with CH 4 supplied in the sweep gas with the assistance of a catalyst. The reactor converts from 74 to 99% of CH 4 under the studied separation and reaction conditions. The total rate of syngas production reaches 6.25 mL∙min 1 ∙cm 2 at 875 °C and a H 2 /CO ratio ranging from 2.1 to 1.3 between 800 and 875 °C. A long-term test shows a stable performance for 300 h. This work sug- gests the feasibility of this capture-conversion concept for the valorization of CO 2 by the efficient produc- tion of syngas. Ó 2019 Elsevier Ltd. All rights reserved. 1. Introduction Greenhouse gases emissions produced by industrial activities are the principal contribution to the anthropogenic climate change. For example, thermal power, cement and steel making plants, are important sources of emission of the hazardous CO 2 to the atmo- sphere (Chung et al., 2018; Espinal, 2013). The use of renewable energy is a promising way to tackle this environmental issue; however, the transition towards a primary use of energy sources without CO 2 emission can only be envisaged in the long term (Koytsoumpa et al., 2018). In this context, the scheme of the efficient capture and subsequent valorization of CO 2 is a topic of interest to the scientific community (Shu-Yuan et al., 2018). https://doi.org/10.1016/j.ces.2019.115250 0009-2509/Ó 2019 Elsevier Ltd. All rights reserved. ⇑ Corresponding author. E-mail address: jortizla@ipn.mx (J. Ortiz-Landeros). Chemical Engineering Science 210 (2019) 115250 Contents lists available at ScienceDirect Chemical Engineering Science journal homepage: www.elsevier.com/locate/ces