Yao, Xin, Yu, Qingbo, Xu, Guowei, Han, Zhengri, Xie, Huaqing, Duan, Wenjun, and Qin, Qin
Abstract A two-stage utilization of the waste heat of granulated blast furnace slag (BFS) was proposed, and the characteristics of bio-oil dry reforming under different conditions were investigated. For the bio-oil dry reforming utilizing granulated BFS as the heat carrier, when the temperature was higher than 800 °C, changes in the characteristics as bio-oil conversion and lower heating value (LHV) were not pronounced in response to the increasing temperature. The bio-oil conversion reached its maximum value with a CO 2 /C (molar ratio of CO 2 to carbon in bio-oil) of 0.85. When the liquid hourly space velocity (LHSV) was higher than 0.45 h−1, the bio-oil conversion and LHV dropped quickly as the LHSV increased. At the optimal condition with a temperature of 800 °C, a CO 2 /C of 0.85 and an LHSV of 0.45 h−1, the bio-oil conversion and LHV reached 90.15% and 511.02 kJ per mole of bio-oil, respectively. Granulated BFS could be beneficial for the bio-oil dry reforming process. Combining biomass pyrolysis and bio-oil dry reforming, a feasible industry application utilizing the waste heat of granulated BFS was presented systematically. Highlights • A two-stage utilization of the waste heat of granulated BFS was proposed. • Temperature of 800 °C, CO 2 /C of 0.85 and LHSV of 0.45 h−1 was regarded as the optimal condition for the bio-oil dry reforming. • At the optimal condition, the conversion of bio-oil and LHV were 90.15% and 511.02 kJ per mole of bio-oil, respectively. • Granulated blast furnace slag could catalyse the bio-oil dry reforming. [ABSTRACT FROM AUTHOR]