Article
Energy & Fuels
Shaotao Xu, Youhong Sun, Xiaoshu Lu, Qinchuan Yang, Qiang Li, Zhendong Wang, Mingyi Guo
Summary: This study investigated the chemical composition and pore evolution of oil shale during oxidizing pyrolysis (OP) and their influences on its thermophysical properties. The results showed that OP can significantly increase the surface and volume of mesopores and macropores in oil shale, leading to notable changes in the thermophysical properties of semi-cokes. Notably, semi-cokes obtained via OP at lower temperatures exhibited higher thermal conductivity and thermal diffusivity compared to those obtained via anaerobic retorting at higher temperatures. These findings highlight the potential of OP for in-situ oil shale exploitation.
Article
Energy & Fuels
Xiangxin Han, Yiru Huang, Xiaoye Wang, Yanwen Wang, Xiumin Jiang
Summary: Fluidized bed retorting of oil shale is a promising technology for high shale oil yield. This study focused on the effect of retorting temperature on product yield and composition distribution. Results showed that increasing retorting temperature led to higher shale oil yield, decreased shale char, and promoted cracking reactions of shale oil.
Article
Thermodynamics
Jian Lei, Baozhi Pan, Yuhang Guo, YuFei Fan, Linfu Xue, Sunhua Deng, Lihua Zhang, A. Ruhan
Summary: The study evaluated the effects of pyrolysis on the pore structure of oil shale through experiments and analysis, showing that pyrolysis significantly increases porosity and changes pore sizes. The results suggest that a single pore detection method has limitations and multiple methods need to be integrated to understand the pore structures of oil shale.
Article
Thermodynamics
Birgit Maaten, Andres Siirde, Signe Vahur, Kalle Kirsimae
Summary: This study focused on the fast pyrolysis process and properties of the produced materials during Estonian oil shale pyrolysis. Different properties of shale oil can be obtained depending on the process conditions. Understanding the process and properties can contribute to the development of oil shale utilization.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Review
Energy & Fuels
Jaber Taheri-Shakib, Apostolos Kantzas
Summary: Microwave irradiation accelerates the efficiency of oil shale pyrolysis and results in higher quality products than conventional heating methods. Additionally, microwave radiation has a better removal effect on impurities like sulfur and nitrogen in oil shale.
Article
Energy & Fuels
Emad A. M. Abdelghani, Krishna Prasad Rajan, Abdelaziz A. Noaman, Ibrahim H. Ali
Summary: This study examines the factors affecting the pyrolysis of oil-shale in Quseir-Safaga, Egypt, and proposes an empirical formula in terms of temperature, time, and particle size. The model demonstrates a good agreement between calculated and measured weight losses, and topographic evaluations reveal kerogen layers released after pyrolysis of the oil-shale.
PETROLEUM SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Fanyi Meng, Chuanjin Yao, Xinge Du, Tianyuan Di, Hexing Zhang, Jiao Ge
Summary: This study compared the influence of high-temperature and high-pressure N2 and supercritical water on the pyrolysis process of shale. The results showed that supercritical water conditions promoted the development of shale pores and had a larger specific surface area compared to N2 conditions. Increasing the temperature of supercritical water changed the ratio of micropores to mesoporous pores and significantly increased the average pore size. Additionally, the porosity of shale increased by 7.6 times under supercritical water conditions, indicating that the temperature of supercritical water could control the change in shale porosity. These findings highlight the potential of supercritical water in in situ shale transformation.
Article
Chemistry, Analytical
Jiahui Li, Xuanlong Shan, Xue Song, Wentong He
Summary: This study conducted a simulation experiment to investigate the in situ conversion process of Huadian oil shale under real underground pressure. The pyrolysis process, subsurface conversion environment, and hydrocarbon generation patterns were systematically analyzed. The results showed that the main oil production stage of Huadian oil shale occurs between 375-425 degrees Celsius. The heating temperature should not be lower than 350 degrees Celsius, and at 425 degrees Celsius, the oil shale no longer has hydrocarbon generation value.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Thermodynamics
Honglei Zhan, Fankai Qin, Sitong Chen, Ru Chen, Zhaohui Meng, Xinyang Miao, Kun Zhao
Summary: This study investigates the pyrolytic degradation mechanism of oil shale through various analytical techniques, revealing a two-step pyrolysis process and providing theoretical support for underground in-situ pyrolysis technology and underground oil shale development.
Article
Thermodynamics
Jiafeng Jin, Jinsheng Sun, Kaihe Lv, Qilin Hou, Xuan Guo, Kesong Liu, Yan Deng, Lide Song
Summary: This study synthesized a novel Cu@4 A zeolite nano-catalyst, which exhibited excellent catalytic pyrolysis performance on oil shale. The catalytic pyrolysis behaviors were investigated and the results showed a decrease in the initial pyrolysis temperature and activation energy after catalytic treatment. The yields of oil, gas, H2, and ethylene increased, and Cu@4 A showed selectivity on light alkanes and alkenes. The configurations of hydrocarbons in nano-pore were investigated by Molecular Dynamics simulations and the catalytic mechanism was elucidated.
Article
Engineering, Chemical
Hao Lu, Luwei Pan, Yue Guo, Quan Xiong, Fangqin Dai, Shuai Wang
Summary: An experimental investigation was conducted to study the characteristics and transformation mechanism of Jimsar oil shale and derived shale oil. Solid-state nuclear magnetic resonance spectrometer, Fourier transform infrared spectroscopy, liquid H-1 NMR, and gas chromatography-mass spectrometry techniques were used. The carbon skeleton structure of Jimsar oil shale is mainly composed of aliphatic carbons and aromatic carbon. Derived shale oil is primarily made of aliphatic compounds dominated by n-alkanes and alkenes. The conversion process involves decomposition of aliphatic groups with methylene structures. Increasing the heating rate promotes secondary cracking reactions in shale oil and enhances the generation of cycloalkanes and aromatic compounds. Shale oil has the maximum yield value, the highest contents of carbon, hydrogen, and nitrogen, and the lowest oxygen content at a pyrolysis heating rate of 5 degrees C/min.
Article
Engineering, Chemical
Dan Wang, Yunyi Liu, Tao Zhang, Daniel Happy Christopher, Nafiu Sadi Bature, Tianbo Fan, Hongfan Guo
Summary: This study compared traditional AR and relatively new SHR processes for oil shale, finding that SHR simplifies the retorting operation and reduces the environmental impact compared to AR. Research results provide critical insights for understanding reaction mechanisms and assessing the environmental impact of both retorting processes.
Review
Chemistry, Analytical
Yi Pan, Jie Peng, Shuangchun Yang, Jianwei Fu, Lei Li
Summary: This paper introduces the application of electric heating technology in the in-situ mining of oil shale and compares traditional and new electric heating technologies. The temperature distribution of oil shale and the layout of oil wells are comprehensively studied through numerical simulation, and future research directions and specific recommendations are provided.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Thermodynamics
Wei Guo, Xu Zhang, Youhong Sun, Qiang Li, Zhao Liu
Summary: This study investigated the migration mechanism and influencing factors of pyrolysis oil in oil shale reservoirs through experiments and simulations. The results showed that oil components in pyrolysis oil underwent separation and followed an alternate cycle of volatilization, migration, and condensation in high-temperature reservoirs. The deposition of asphaltene and the accumulation of high-viscosity oil significantly reduced reservoir permeability during the middle stage of exploitation. Additionally, it was found that the quality of produced oil and the energy conversion ratio improved greatly when the temperature of injected nitrogen was 500 degrees C.
Article
Chemistry, Applied
Xiangchun Liu, Guoqing Li, Haiyue Zhao, Feng Cheng, Ruilun Xie, Zhigang Zhao, Ping Cui
Summary: Low-temperature pyrolysis treatment significantly increased the caking index of oil shale, leading to improved combustion performance. The generation of caking components with suitable molecular structures played a key role in enhancing the properties of the oil shale.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Thermodynamics
Yue Guo, Fangqin Dai, Shouzhou Yang
APPLIED THERMAL ENGINEERING
(2016)
Article
Metallurgy & Metallurgical Engineering
Yue Guo, Xican Zeng, Luwei Pan, Weidong Zeng, Fangqin Dai, Yu Feng
Summary: The use of Hi-B steel in transformer core manufacturing can save raw materials and reduce the size and energy consumption of transformers. The forsterite film on the steel surface provides insulation and is formed through the reaction between the internal oxidized zone (IOZ) and the MgO coating during high-temperature annealing. This study investigates the effect of annealing atmosphere and heating rate on the evolution of IOZ morphology during the initial heating stage of high-temperature annealing.
OXIDATION OF METALS
(2022)
Article
Chemistry, Analytical
Guanshuai Zhang, Shanjian Liu, Dongmei Bi, Zhisen He, Jia Liu, Yinjiao Liu
Summary: Hydrogen peroxide pretreatment was applied for fast pyrolysis of corn stalks, and it was found that the pretreatment effectively promoted lignin depolymerization and decreased the reaction activation energy. The pretreatment also increased the cellulose content and removed alkali and alkaline earth metals from the biomass. The pH of the hydrogen peroxide solution affected the removal of lignin and ash by the pretreatment, and the composition of bio-oil changed significantly, with a significant increase in the relative content of levoglucosan after pretreatment.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2024)
