Effect of Fe, Ni, and Co on the hydrothermal liquefaction of Chinese herb residue for bio-oil productionLiangbei Liu, Haibin Guan, Bingtong Chen, Baofeng Zhao, Cunqing Zhong, Heming Zhang, Di Zhu, Qinghe Bao, Bari Wulan and Xiangyu FengSci. Tech. Energ. Transition, 79 (2024) 24DOI: https://doi.org/10.2516/stet/2024018