Carbon materials (e.g., carbon, charcoal, activated carbon) are easily heated by microwaves as they are, in general, very good absorbents of microwaves (Menéndez et al., 2010). Recently, a novel concept of pyrolysis utilizing microwave absorbents is being developed, in which the use of these absorbents could significantly improve the heating rate. With minimal energy input through microwave irradiation, the temperature of the reactor is steady when the solid residue is dropped directly onto the heated absorbent. In this concept, the biomass is heated due to two heating mechanisms simultaneously used: the microwave irradiation and conduction due to the high temperature of the absorbents. Since the biomass is almost instantaneously heated (less than 1 s) to the reaction temperature, it can be feed continuously or semi-continuously to the reactor. These findings suggest that MAP, which was in the intermediate rate pyrolysis category, can reach fast microwave assisted pyrolysis (fMAP) conditions with this new heating mechanism, thus achieving higher product yield and quality at the same time.