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To gain further chemical kinetic insights into this process, laboratory\u2010scale experiments is combined using isotopically labeled\n 13<\/jats:sup>\n CO\n 2<\/jats:sub>\n with detailed chemical modeling. In the experiments, an atmospheric\u2010pressure coaxial dielectric barrier discharge plasma reactor attached to a molecular\u2010beam mass spectrometer is used to detect reaction products from a feed mixture containing equal amounts of CH\n 4<\/jats:sub>\n and CO\n 2<\/jats:sub>\n . The experiments confirm that the formation of the observed hydrocarbons is clearly related to the CH\n 4<\/jats:sub>\n chemistry and that the detected double\u2010oxygenated C\n 2<\/jats:sub>\n H\n 4<\/jats:sub>\n O\n 2<\/jats:sub>\n , C\n 3<\/jats:sub>\n H\n 6<\/jats:sub>\n O\n 2<\/jats:sub>\n , and C\n 4<\/jats:sub>\n H\n 8<\/jats:sub>\n O\n 2<\/jats:sub>\n species can partially be traced back to the CO\n 2<\/jats:sub>\n chemistry. To provide further insights, the chemistry mechanism from the earlier work (\n Proc. Combust. Inst.,<\/jats:italic>\n 2024,<\/jats:bold>\n 40, 105404) is expanded to include the formation chemistry of these double\u2010oxygenated products. The updated mechanism predicts the formation of both acids and esters, for example, acetic acid (CH\n 3<\/jats:sub>\n COOH) and methyl formate [HC(=O)OCH\n 3<\/jats:sub>\n ] for the C\n 2<\/jats:sub>\n H\n 4<\/jats:sub>\n O\n 2<\/jats:sub>\n species. According to the reaction path analysis, the products are formed through the COOH radical that itself stems from the CO+OH reaction, with the CO being partially formed from plasma\u2010initiated CO\n 2<\/jats:sub>\n dissociation.\n <\/jats:p>","DOI":"10.1002\/cphc.202500318","type":"journal-article","created":{"date-parts":[[2025,10,7]],"date-time":"2025-10-07T01:30:16Z","timestamp":1759800616000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Entanglement of CH\n 4<\/sub>\n and CO\n 2<\/sub>\n Chemistries in Plasma\u2010Assisted Dry Reforming of Methane"],"prefix":"10.1002","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1375-0797","authenticated-orcid":false,"given":"Nils","family":"Hansen","sequence":"first","affiliation":[{"name":"Combustion Research Facility Sandia National Laboratories Livermore CA 94550 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emma 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