A small bench scale of fMAP was developed in the authors’ lab to process biomasses with semi-continuous biomass feeding, in the presence of microwave absorbents. In this study, wood sawdust and corn stover were pyrolyzed using SiC as microwave absorbent. The preliminary data showed that the temperature of SiC samples could reach up to 960 C in a small 750Wmicrowave oven system. The objective of the study was to examine the effects of microwave absorbent on yields and properties of the bio-oil, char and gas. The effects of key process variables, such as temperature, feedstock loading, particle sizes of absorbent and biomass, and vacuum degree, on the bio-oil yield were also analyzed. Detailed physical and chemical characterization of the bio-oil, char and gas produced were carried out.