Using the microwave heating possesses selective characteristics,two kinds of microwave-assisted dual functional residue hydrogenation catalysts C-Fe and C-Si was prepared by adding the microwave sensitizer during the preparation of catalysts. The crystal phase, pore structure, acidity, acid strength distribution, reducibility and micro-morphology of the catalysts were characterized by X-ray diffraction, nitrogen adsorption-desorption, infrared spectroscopy, hydrogen temperature programmed reduction and field emission TEM techniques. The microwave-assisted catalytic hydrogenation of residue was conducted under the same microwave conditions to compare with the commercial catalyst. It is found that Fe2O3 is formed in the burning stage of the catalyst C-Fe. However, no reactions of the support or active metals with formed Fe2O3 or SiC in C-Si catalyst is observed. The pore volume of the catalyst containing microwave sensitizer is decreased, while the content of Br?nsted acid at mid-low temperature is increased. The reduction peak area of C-Fe is increased and the peak moves to higher temperature. The TEM results indicate that the microwave sensitizer was wrapped by alumina in the prepared residue hydrogenation catalyst. The C-Si has the equivalent impurity removal activity under microwave-assisted conditions with the commercial catalyst, while the performance of the catalyst C-Fe is the best of the three.
