Feasibility of Biochar Preparation with Solar Pyrolysis Method Huihong Luo, Shaohong Chen, Jie Li, Xiaoting Hou, Nuo Chen, Haipeng Lan, Dongyong Cai, Qia Chen, Xiaoyin Yang, Sitian Zhang and Changsheng Peng E3S Web Conf., 299 (2021) 03003 Published online: 05 August 2021 DOI: 10.1051/e3sconf/202129903003