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Such technologies offer greater energy efficiency and sustainability by eliminating the need for separate, energy\u2010intensive alkane dehydrogenation steps. In this work, we report a dual chemical looping \/ catalytic process that couples alkane dehydrogenation with aromatic alkylation over a copper\u2010containing mordenite yielding up to 25% of alkylated aromatics with &gt;97% selectivity per cycle. In situ MAS NMR and FTIR spectroscopies combined with DFT calculations showed that the alkylation of benzene with alkanes proceeds via a \u03c0\u2010bounded Cu(I)\u2010olefin intermediate, which subsequently interacts with benzene, catalyzed by Br\u00f8nsted acid sites, leading to alkylated products that readily desorb from the active material into the gas phase. DFT calculations show that alkylation mediated solely by Cu(I) has prohibitively high barriers (&gt;1.8\u00a0eV), whereas a bi\u2010functional pathway involving both Cu(I) and Br\u00f8nsted acid sites can proceed with significantly lower barrier (0.8\u00a0eV) through a concerted C\u2013C bond formation and proton transfer step.<\/jats:p>","DOI":"10.1002\/anie.202523668","type":"journal-article","created":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T09:12:52Z","timestamp":1769764372000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Dual Chemical Looping\/Catalytic Process for Alkylation of Benzene With Ethane and Propane Yielding Ethylbenzene and Cumene Over Copper\u2010Containing Mordenite"],"prefix":"10.1002","volume":"65","author":[{"given":"Florent J.","family":"Dubray","sequence":"first","affiliation":[{"name":"Paul Scherrer Institute (PSI) Center For Energy and Environmental Sciences  Villigen 5232 Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu\u2010Hsun","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering University of California  Davis California 95616 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mikalai A.","family":"Artsiusheuski","sequence":"additional","affiliation":[{"name":"Paul Scherrer Institute (PSI) Center For Energy and Environmental Sciences  Villigen 5232 Switzerland"},{"name":"Laboratory For the Science and Applications of Catalysis College of Chemistry University of California at Berkeley  Berkeley California 94720 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiawei","family":"Guo","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering University of California  Davis California 95616 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rene","family":"Verel","sequence":"additional","affiliation":[{"name":"Institute For Chemical and Bioengineering ETH Zurich  Vladimir\u2010Prelog\u2010Weg 1 Zurich 8093 Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ambarish","family":"Kulkarni","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering University of California  Davis California 95616 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeroen A.","family":"van Bokhoven","sequence":"additional","affiliation":[{"name":"Paul Scherrer Institute (PSI) Center For Energy and Environmental Sciences  Villigen 5232 Switzerland"},{"name":"Institute For Chemical and Bioengineering ETH Zurich  Vladimir\u2010Prelog\u2010Weg 1 Zurich 8093 Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3788-8969","authenticated-orcid":false,"given":"Vitaly L.","family":"Sushkevich","sequence":"additional","affiliation":[{"name":"Paul Scherrer Institute (PSI) Center For Energy and Environmental Sciences  Villigen 5232 Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,1,30]]},"reference":[{"key":"e_1_2_7_2_1","volume-title":"Industrial Aromatic Chemistry","year":"1988"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-031-24166-6"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.energy.2005.04.001"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.fuel.2024.131270"},{"key":"e_1_2_7_6_1","first-page":"1","article-title":"A Review on the Production of Light Olefins Using Steam Cracking of Hydrocarbons","volume":"14","author":"Gholami Z.","year":"2021","journal-title":"Energies (Basel)"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.17077\/0031\u20100360.24332"},{"key":"e_1_2_7_8_1","unstructured":"S.Crone O.Machhammer andG.\u2010P.Schindler Method for the production of propene from propane EP 1 824 803 B1 2009."},{"key":"e_1_2_7_9_1","unstructured":"E.ClippingerandB. 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