Preparation of Activated Carbons from Waste External Thermal-Insulating Phenolic Foam BoardsLijuan Gao, Xiaojun Zheng, Yaming Zhu, Xuefei Zhao and Junxia ChengMATEC Web Conf., 142 (2018) 01005DOI: https://doi.org/10.1051/matecconf/201714201005