05256b5b08693f5c5c5faaa22606b1de EngPro_a2022v19n1p32.pdf 5fd8dba9503f587b35665cd1944cf2fb9bb64acb EngPro_a2022v19n1p32.pdf ca10bad6f5a3d509af8faafb73cbef8baa2f2f508acf99e7dc7d3b36fbd43aa5 EngPro_a2022v19n1p32.pdf Title: Cobalt Nanocomposites as Catalysts for Carbon Dioxide Conversion to Methanol "2279 Subject: Carbon capture and utilisation (CCU), has arisen as an alternative to the reduction of CO2 concentration in the atmosphere by converting it into value-added products. CO2 conversion to methanol presents certain drawbacks, such as high pressure and temperature conditions and, to solve these issues, new materials are being investigated. Among them, cobalt stands out due to its abundance and low price compared to noble metals. Cobalt and its oxides exhibit interesting electronic and magnetic properties and are being used as catalysts in a wide range of reactions. In this work, we present a systematic comparison of different cobalt and cobalt oxide nanocomposites in terms of their efficiency as catalysts for CO2 hydrogenation to methanol, and how porous and non-porous supports can enhance their catalytic capacity. For this purpose, a fixed bed reactor operating with continuous flow is used, under mild temperature (160–260 C) and pressure (10–15 bar) conditions. Several parameters are measured to evaluate the efficiency of the catalysis: CO2 conversion; space–time yield (STY), which indicates the methanol production yield per mass unit of catalyst and reaction time, and methanol selectivity, which evaluates the production of reaction side products such as carbon monoxide. How the adsorption capacity provided by the porous supports can enhance the catalytic capacity of cobalt and cobalt oxide is confirmed, as well as how porous supports such as zeolite and graphene clearly improve this capacity compared with a non-porous support such as silicon dioxide. Keywords: methanol; nanocomposites; heterogeneous catalysis; cobalt Author: Javier Moral-Vico, Anna Carrasco García and Antoni Sánchez Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Mon Jul 11 11:03:09 2022 CEST ModDate: Mon Jul 11 11:07:18 2022 CEST Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 3 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 531797 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- SSNIUI+VnURWPalladioL-Bold Type 1 Custom yes yes no 10 0 FBTPXS+URWPalladioL-Bold Type 1 Custom yes yes no 15 0 KSSMKD+URWPalladioL-Roma Type 1 Custom yes yes no 20 0 VEAYVQ+URWPalladioL-Ital Type 1 Custom yes yes no 24 0 QGUKZH+CMSY10 Type 1 Builtin yes yes no 28 0 BFTPJC+VnURWPalladioL Type 1 Custom yes yes no 32 0 BCDEEE+PalatinoLinotype-Bold TrueType WinAnsi yes yes no 74 0 BCDFEE+PalatinoLinotype-Roman TrueType WinAnsi yes yes no 78 0 BCDGEE+PalatinoLinotype-Italic TrueType WinAnsi yes yes no 82 0 BCDIEE+PalatinoLinotype-Roman CID TrueType Identity-H yes yes yes 86 0 TimesNewRomanPSMT TrueType WinAnsi no no no 93 0 BCDJEE+Calibri TrueType WinAnsi yes yes no 97 0 Jhove (Rel. 1.28.0, 2023-05-18) Date: 2023-12-01 02:35:04 CET RepresentationInformation: EngPro_a2022v19n1p32.pdf ReportingModule: PDF-hul, Rel. 1.12.4 (2023-03-16) LastModified: 2023-11-30 16:56:33 CET Size: 531797 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 144 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: section.1 Item: Title: Results and Discussion Destination: section.2 Item: Title: Conclusions Destination: section.3 Item: Title: References Destination: section.3 Info: Title: Cobalt Nanocomposites as Catalysts for Carbon Dioxide Conversion to Methanol "2279 Author: Javier Moral-Vico, Anna Carrasco García and Antoni Sánchez Subject: Carbon capture and utilisation (CCU), has arisen as an alternative to the reduction of CO2 concentration in the atmosphere by converting it into value-added products. CO2 conversion to methanol presents certain drawbacks, such as high pressure and temperature conditions and, to solve these issues, new materials are being investigated. Among them, cobalt stands out due to its abundance and low price compared to noble metals. Cobalt and its oxides exhibit interesting electronic and magnetic properties and are being used as catalysts in a wide range of reactions. In this work, we present a systematic comparison of different cobalt and cobalt oxide nanocomposites in terms of their efficiency as catalysts for CO2 hydrogenation to methanol, and how porous and non-porous supports can enhance their catalytic capacity. For this purpose, a fixed bed reactor operating with continuous flow is used, under mild temperature (160 260 C) and pressure (10 15 bar) conditions. Several parameters are measured to evaluate the efficiency of the catalysis: CO2 conversion; space time yield (STY), which indicates the methanol production yield per mass unit of catalyst and reaction time, and methanol selectivity, which evaluates the production of reaction side products such as carbon monoxide. How the adsorption capacity provided by the porous supports can enhance the catalytic capacity of cobalt and cobalt oxide is confirmed, as well as how porous supports such as zeolite and graphene clearly improve this capacity compared with a non-porous support such as silicon dioxide. 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