2026-06-03T02:09:53Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/293252026-02-03T11:18:45Zcom_10630_2254col_10630_37953

Phosphorus-containing mesoporous carbon acid catalyst for methanol dehydration to dimethyl ether. Valero-Romero, María José Calvo-Muñoz, Elisa Maria Ruiz-Rosas, Ramiro Rafael Rodríguez-Mirasol, José Cordero-Alcántara, Tomás Catalizadores Carbono Fósforo Metanol (Combustible) Catalytic dehydration of methanol on an acid carbon catalyst prepared by chemical activation of olive stone with H3PO4 is reported. This preparation methodology produces carbons with a well-developed porous texture and highly thermally stable phosphorus surface complexes in form of C–O–PO3 and C–PO3. These P groups confer the carbon with a high oxidation resistance, surface acid and redox sites. In the absence of oxygen, the catalyst experimented a gradual deactivation due to coke deposition on the strong acid sites (P-OH) and reduction of the moderate-strength acid P-surface groups (from C–O–P to C–P type ones). The novelty of this research concerns the high catalytic stability in air atmosphere of this type of carbon with a steady state methanol conversion of 20% at 300ºC and selectivity towards dimethyl ether of 95%. The presence of oxygen in the reaction gas avoids coke deposition by continuously (re)oxidation of reduced P-surface groups, without gasification of the carbon catalyst. 2024-01-26T12:41:17Z 2024-01-26T12:41:17Z 2024 2019-02-14 journal article María José Valero-Romero, Elisa María Calvo-Muñoz, Ramiro Ruiz-Rosas, José Rodríguez-Mirasol and Tomás Cordero. Phosphorus-Containing Mesoporous Carbon Acid Catalyst for Methanol Dehydration to Dimethyl Ether. Ind. Eng. Chem. Res. 2019, 58, 4042−4053 https://hdl.handle.net/10630/29325 10.1021/acs.iecr.8b05897 spa open access ACS Publications