岩土力学2025，Vol.46Issue(12)：3757-3772,3783,17.DOI:10.16285/j.rsm.2024.1602
高温蒸汽作用下催化剂对油页岩孔隙结构及力学特性演化规律研究
Evolution law of porous structure and mechanical properties of oil shale under catalyst action of high-temperature steam
摘要
Abstract
The use of catalysts under high-temperature steam conditions enhances oil shale pyrolysis efficiency and increases the permeability of flow channels,serving as a prerequisite for the industrialization of in-situ thermal extraction of oil shale.An experimental approach was used to investigate how catalysts affect microscopic pore-structure parameters and the extent of damage to oil shale during high-temperature steam pyrolysis.We independently constructed the oil shale pyrolysis experimental system,and results show that adsorption capacity,specific surface area,pore volume,and mechanical properties vary with catalyst concentration.The main conclusions are as follows:(1)The mass loss rate of oil shale treated with MnSO4 and CrCl3 solutions increases significantly relative to untreated shale,by up to 6.9%and 4.7%,respectively.As catalyst concentration increases,oil shale pores become predominantly small mesoporous(2-10 nm);the Barrett-Joyner-Halenda(BJH)pore volume and specific surface area increase.Owing to the predominance of small mesopores,the average pore size initially increases and then decreases.The fractal dimension decreases.(3)Catalytic pyrolysis reduces the elastic modulus of oil shale to varying degrees,with greater deterioration at higher catalyst concentrations.The maximum decreases in elastic modulus are 2.43 GPa and 3.35 GPa,respectively,and the corresponding peak energy-storage densities are below 0.12 MJ/m3.Higher catalyst concentrations lead to more extensive pyrolysis,with weaker energy absorption,storage,and release,and greater energy consumption.关键词
油页岩/催化剂/孔隙结构/损伤劣化Key words
oil shale/catalyst/pore structure/damage deterioration分类
建筑与水利引用本文复制引用
ZHANG Xiao,LI Li-ping,TANG Ju-peng,YU Hong-hao,ZHAO Ya-ru..高温蒸汽作用下催化剂对油页岩孔隙结构及力学特性演化规律研究[J].岩土力学,2025,46(12):3757-3772,3783,17.基金项目
国家自然科学基金面上项目(No.52374122) （No.52374122）
内蒙古科技重大专项(No.2021ZD0034-2) （No.2021ZD0034-2）
辽宁省兴辽英才计划项目(No.XLYC1902106). This work was supported by the General Program of National Natural Science Foundation of China(52374122),the Inner Mongolia Science and Technology Major Project(2021ZD0034-2)and the Liaoning Xingliao Talent Program Project(XLYC1902106). （No.XLYC1902106）
