文献类型：期刊文献

英文题名：A comprehensive kinetics study on non-isothermal pyrolysis of kerogen from Green River oil shale

作者：Kuang, Wuqi[1]; Lu, Mengke[1]; Yeboah, Isaac[2]; Qian, Gang[1]; Duan, Xuezhi[1]; Yang, Jia[2]; Chen, De[2]; Zhou, Xinggui[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China; [2] Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim, 7491, Norway

年份：2019

卷号：377

外文期刊名：Chemical Engineering Journal

收录：EI(收录号：20184606071682)

语种：英文

外文关键词：Oil shale - Least squares approximations - Isotherms - Kerogen - Pyrolysis - Reaction kinetics - Activation energy - Thermogravimetric analysis - Activation analysis - Carbonates

摘要：Fundamentally understanding the pyrolysis kinetics of kerogen is of prime scientific and industrial importance. Herein, bitumen- and carbonates-free kerogen sample is prepared through Soxhlet extraction followed by decarbonation of Green River oil shale, and its pyrolysis is studied by non-isothermal thermogravimetric analysis. The systematic analyses show that both the Popescu and master plots methods are not applicable to describe the kerogen pyrolysis process due to the changed reaction model and the varied activation energy over certain conversion range, respectively, while the piecewise non-linear least squares analysis is identified as an effective method to discriminate the most probable kinetic model from commonly used 15 reaction models based on four solid-state pyrolysis mechanisms. Two-stage reaction model, i.e., F1 at the early stage and F2 at the later one, is proposed to well describe the kerogen pyrolysis process, which demonstrates a wide applicability owing to their insensitivities on the heating rate and estimation methods of the activation energies. The methodology revealed here could be applicable to determine other solid-state pyrolysis kinetics and reaction mechanism. ? 2018 Elsevier B.V.