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The Cu/Al_2O_3 catalysts were prepared by the solution combustion synthesis method using aluminum nitrate and copper nitrate as oxidants and citric acid as fuel. The Cu/Al_2O_3 catalysts were characterized by XRD, N_2 adsorptiondesorption, SEM-EDS, and H_2-TPR techniques. The test results indicated that this catalyst contained mesoporostity and highly dispersed copper. The Cu/Al_2O_3 catalysts were utilized as bifunctional catalysts in the syngas-to-dimethyl ether(STD) process. The CO conversion and DME selectivity were 70.9% and 58.8%, respectively. Moreover, the CO conversion kept increasing from 260 ℃ to 320 ℃ thanks to the high copper dispersion, which could reduce copper sintering at high reaction temperatures.
The Cu / Al 2 O 3 catalysts were prepared by the solution combustion synthesis method using aluminum nitrate and copper nitrate as oxidants and citric acid as fuel. The Cu / Al 2 O 3 catalysts were characterized by XRD, N 2 adsorption desorption, SEM-EDS, and H 2 -TPR techniques. The test results indicated that this catalyst contained mesoporostity and highly dispersed copper. The Cu / Al 2 O 3 catalysts were utilized as bifunctional catalysts in the syngas-to-dimethyl ether (STD) process. The CO conversion and DME selectivity were 70.9% and 58.8% respectively. the CO conversion kept increasing from 260 ℃ to 320 ℃ thanks to the high copper dispersion, which could reduce copper sintering at high reaction temperatures.