<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Enhanced activity and stability of SO42�/ZrO2 by addition of Cu combined with CuZnOZrO2 for direct synthesis of dimethyl ether from CO2 hydrogenation"^^ . "Cu-modified SO42�/ZrO2 catalysts (XCu-SZ) with different Cu loading contents were prepared by sulfation of ZrOCl2·8H2O with (NH4)2SO4 to form SO42�/ZrO2 (SZ) followed by impregnation of SZ with a Cu precursor. The resulting XCu-SZ catalysts combined with a CuO�ZnO�ZrO2 catalyst were tested for CO2 hydrogenation to dimethyl ether (DME). The results indicated that the unmodified SZ catalyst exhibited the maximum DME yield (3.7) which was 2.0�2.6 times higher than the DME yield of all XCu-SZ catalysts at the beginning of reaction. However, the DME yield over the unmodified SZ catalyst rapidly decreased, while that of all XCu-SZ catalysts gradually increased during the time-on-stream experiment. After 100 h, the 6 wt Cu-modified SZ catalyst achieved the maximum DME yield of 3.2 at 260 °C and 20 bar, while the DME yield of the unmodified SZ catalyst was only 2.5. The NH3-TPD and XPS analyses indicated that more strong acid sites were present on the unmodified SZ catalyst, resulting in a coke formation and thus the rapid deactivation. For the XCu-SZ catalysts, Cu0 was formed on the surface of SZ after the reduction with H2 which accounted for the active site of hydrogenolysis of methanol to methane. During the time-on-stream experiment, Cu0 was progressively transformed to Cu2S through poisoning, leading to the continued increase of DME yield. © 2022 Hydrogen Energy Publications LLC"^^ . "2022" . . "47" . "98" . . "Elsevier Ltd"^^ . . . "International Journal of Hydrogen Energy"^^ . . . "03603199" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "C.K."^^ . "Cheng"^^ . "C.K. Cheng"^^ . . "B.V."^^ . "Ayodele"^^ . "B.V. Ayodele"^^ . . "M."^^ . "Chareonpanich"^^ . "M. Chareonpanich"^^ . . "N."^^ . "Dolsiririttigul"^^ . "N. Dolsiririttigul"^^ . . "T."^^ . "Numpilai"^^ . "T. Numpilai"^^ . . "T."^^ . "Witoon"^^ . "T. Witoon"^^ . . "Y."^^ . "Poo-arporn"^^ . "Y. Poo-arporn"^^ . . "N."^^ . "Chanlek"^^ . "N. Chanlek"^^ . . "J."^^ . "Limtrakul"^^ . "J. Limtrakul"^^ . . . . . "HTML Summary of #16062 \n\nEnhanced activity and stability of SO42�/ZrO2 by addition of Cu combined with CuZnOZrO2 for direct synthesis of dimethyl ether from CO2 hydrogenation\n\n" . "text/html" . .