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Characterizing the micropores in Lacustrine Shales of the Late Cretaceous Qingshankou Formation of Southern Songliao Basin, NE China

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Acta Geologica Sinica(English Edition) 2018年第6期92卷 2267-2279页

作者： GE Mingna REN Shoumai GUO Tianxu ZHOU Zhi WANG Shengjian BAO Shujing Oil and Gas Survey China Geological SurveyBeijing 100083China China Geological Survey Beijing 100037China

micropores of shale are significant to the gas content and production potential of shale, which has been verified in the research of marine shale gas; while, few studies have been conducted on lacustrine shales. This study collected 42 samples from three wells in the Late Cretaceous Qingshankou Formation of the southern Songliao Basin, NE China, and investigated these samples by the focused ion beam-scanning electron microscope(FIB–SEM) and nitrogen adsorption analysis techniques. Four types of micropores were identified in the samples, i.e., intergranular pore, intracellular pore, organic matter pore and microfracture. The pore structure type is characterized by open slit pores and "ink type" pores which are mainly 1.5–5 nm in diameter with mesopores as the main pores. The mesopores account for 74.01% of the pore volume and 54.68% of the pore surface area. Compared with the lacustrine shales from the Triassic Yanchang Formation in the Ordos Basin and Xujiahe Formation in the Sichuan Basin, the intergranular clay mineral interlayer pores are considered to be the main reservoir space for shale gas storage in the study area, followed by intraparticle pores, organic matter pores and microfractures. Maturity and micropore are the key controlling factors which affect the shale gas content of the Qingshankou Formation in southern Songliao Basin.

关键词： micropores lacustrine shale Cretaceous Qingshankou Formation southern Songliao Basin

micropores in G20Mn5N cast steel and their influence on stress distribution

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Journal of Southeast University(English Edition) 2024年第3期40卷 286-294页

作者： Yan Huadong Jin Hui School of Civil Engineering Southeast UniversityNanjing 211189China Jiangsu Key Laboratory of Engineering Mechanics Southeast UniversityNanjing 211189China

To accurately analyze the impact of casting pores in steel,high-resolution 3D X-ray tomography technology was used to gather detailed statistical information about *** micropores were classified as gas,shrinkage,and gas-shrinkage pores depending on their formation origin and *** tendencies and affinity parameters were defined to characterize the spatial correlations among these three types of *** 3D data from X-ray tomography scans were then integrated into finite element analysis(FEA)software to predict how micropore shape,size,and distribution influence stress distribution within the *** results show that certain inflection points with small local radii within the cast pores are major contributors to stress ***,cast pores cannot be simply modeled as ideal spherical *** sphericity and volume of pores have a significant impact on the stress concentration of the ***,lower sphericity and larger pore volumes result in higher stress ***,the internal pores of steel castings exhibit specific global distribution *** located on the surface of the specimen lead to significantly higher stress concentrations compared to those located inside the specimen.

关键词： cast steel micropores X-ray tomography 3D reconstruction finite element analysis

Comparison of dynamic adsorption/desorption characteristics of toluene on different porous materials

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Journal of Environmental Sciences 2012年第3期24卷 520-528页

作者： Weiwei Zhang Zhenping Qu Xinyong Li Yi Wang Ding Ma Jingjing Wu Key Laboratory of Industrial Ecology and Environmental Engineering(MOE) School of Environmental Science and TechnologyDalian University of TechnologyDalianLinggong 116024China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Four different types of adsorbents, SBA-15, MCM-41, NaY and SiO2, were used to study the dynamic adsorption/desorption of toluene. To further investigate the influence of pore structure on its adsorption performance, two SBA-15 samples with different microspores were also selected. It is shown that microporous material NaY has the largest adsorption capacity of 0.2873 mL/g, and the amorphous SiO2 exhibits the least capacity of 0.1003 mL/g. MCM-41 also shows a lower break through capacity in spite of the relatively small pore diameter, because it can not provide the necessary small geometric confinement for the tiny adsorbates. However, the mesoporous SBA-15 silica with certain micropore volume shows relatively higher adsorption capacity than that of MCM-41 silica. The presence of micropores directly leads to an increase in the dynamic adsorption capacity of toluene. Although NaY has the highest adsorption capacity for toluene, its complete desorption temperature for toluene is high （〉 350°C）, which limits its wide application. On the contrary, mesoporous silica materials exhibits a good desorption performance for volatile organic compounds at lower temperatures. Among these materials mesoporous SBA-15 samples, with a larger amount micropores and a lower desorption temperature, are a potentially interesting adsorbent for the removal of volatile organic compounds. This behavior should been related with the best synergetic effect of mesopores and micropores.

关键词： dynamic adsorption/desorption mesopores micropores toluene

Sludge-based biochar adsorbent:pore tuning mechanisms,challenges,and role in carbon sequestration

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Biochar 2023年第1期5卷 1419-1441页

作者： Md Manik Mian Wenya Ao Shubo Deng State Key Joint Laboratory of Environment Simulation and Pollution Control(SKLESPC) Beijing Key Laboratory for Emerging Organic Contaminants ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China

Sludge biochar,a carbonized product of raw sludge,contains porous architectures that can act as epicenters for adsorbing external molecules through physical or chemical *** biochar also immobilizes innate micropollutants,which is advantageous over conventional sludge disposal *** date,numerous strategies have been discovered to improve sludge biochar morphology,but the influential factors,pore tuning mechanisms,and process feasibility remain *** knowledge gap limits our ability to design a robust sludge-based ***,we present state-of-the-art sludge biochar synthesis methods with insight into structural and chemical transformation *** and novel concepts for improving sludge biochar porous architecture are *** the first time,sludge biochar properties,adsorption performances,and techno-economic perspectives were compared with commercial activated carbon(AC)to reveal the precise challenges in sludge biochar *** importantly,sludge biochar role in carbon sequestration is detailed to demonstrate the environmental significance of this ***,the review concludes with an overview of prospects and an outlook for developing sludge biochar-based research.

关键词： Sludge-based adsorbent micropores Feasible methods Challenges Carbon sequestration

Controllable construction of ionic frameworks for multi-site synergetic enhancement of CO_(2) capture

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Frontiers of Chemical Science and Engineering 2024年第1期18卷 37-49页

作者： Yuke Zhang Hongxue Xu Haonan Wu Lijuan Shi Jiancheng Wang Qun Yi State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan 030024China School of Chemical Engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430205China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030024China

CO_(2) capture is one of the key technologies for dealing with the global warming and implementing lowcarbon development *** emergence of ionic metal-organic frameworks(I-MOFs)has diversified the field of porous materials,which have been extensively applied for gas adsorption and *** this work,amino-functionalized imidazolium ionic liquid as organic monodentate ligand was used for one step synthesis microporous Cu based *** tuning of the adsorption properties was obtained by incorporating aromatic anions,such as phenoxy,benzene carboxyl,and benzene sulfonic acid group into the I-MOFs via a facile ion exchange *** new I-MOFs showed high thermal stability and high capacity of 5.4 mmol·g^(-1) under atmospheric conditions for selective adsorption of CO_(2).The active sites of microporous Cu-MOF are the ion basic center and unsaturated metal,and electrostatic attraction and hydroxyl bonding between CO_(2) and modified functional sulfonic groups are responsible for the *** work provides a feasible strategy for the design of I-MOF for functional gas capture.

关键词： carbon dioxide capture micropores ionic liquids multi-site synergism ionic metal-organic frameworks

Preparation of ultrahigh surface area porous carbons templated using zeolite 13X for enhanced hydrogen storage

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Progress in Natural Science:Materials International 2013年第3期23卷 308-316页

作者： Eric Masika Robert Mokaya School of Chemistry University of NottinghamUniversity ParkNottingham NG7 2RDUK

In this report,the use of zeolite 13X as a template to generate ultrahigh surface area carbons,via a two-step process combining liquid impregnation and chemical vapour deposition is *** first step in the nanocasting process involves impregnation of zeolite 13X with furfuryl alcohol and the second step consists of chemical vapour deposition(CVD) of ethylene at 700 ***-like structural ordering was achieved for zeolite templated carbons(ZTCs) prepared at variable heating ramp rates of 5,10 or 15 1C/*** textural properties of ZTCs prepared at all heating ramp rates were comparable with small variations in which the lowest ramp rate(5 1C/min) generated ZTC with highest surface area and pore volume of 3332 m 2 /g and 1.66 cm 3 /g *** carbon materials achieved a remarkable hydrogen uptake of 7.3 wt% at 20 bar and 77 K which is the highest ever recorded for carbon *** report also explores the mechanical stability of the ZTCs via compaction at up to 10t(equivalent to 740 MPa) in which the compacted samples showed minimal modification and retained high hydrogen storage capacity.

关键词： Hydrogen storage Zeolite templated carbon Zeolite 13X High surface area micropores

Three-dimensional characteristics of Fe-rich intermetal ics in gravity-cast Al-6Si alloys

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China Foundry 2017年第5期14卷 379-385页

作者： Chen Hu Wen-feng Luo Hai-dong Zhao National Engineering Center for Metallic Materials Net-shape Forming South China University of TechnologyGuangzhou 510640China

Fe-rich intermetallics, especially β-Fe phase, usually forming in the microstructure of cast aluminum alloys, are very detrimental to mechanical properties. In the present work, the effects of Fe content on phase transformation and microstructures were analyzed using a 3D X-ray microscope. Based on the highresolution 3D X-ray computed tomography, the 3D characteristics of Fe-rich intermetallics and micropores in the gravity-cast Al-6 Si alloys with different Fe contents were investigated. In addition, the effect of intermetallics on the microporosity was discussed. The results show that with increasing the Fe content from 0.10 wt.% to 0.60 wt.%, the volume fraction of Fe-rich intermetallics and the volume of the largest size Fe-rich intermetallic increased, and the 3D morphology of intermetallics changed from fine flake to network aggregation. As the Fe contents increased, the shrinkage pores were characterized, which were rather complex due to the micropores promoted by the intermetallics interactions.

关键词： Fe-rich intermetallics 3D X-ray computed tomography micropores Al-Si alloy

Quantitative Characterization of Micropore Structure of Shale Reservoir

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Acta Geologica Sinica(English Edition) 2015年第A01期89卷 63-64页

作者： LI Wenhao LU Shuangfang XUE Haitao ZHANG Pengfei HU Ying LI Qian ZHANG Han LIWenhao Research Institute of Unconventional Petroleum and Renewable Energy China University of Petroleum QingdaoShangdong 266580 China School of Geosciences China University of Petroleum Qingdao Shangdong 266580 China

The scholars in the world are trying to discuss the micropore structure of shale reservoir using different kinds of methods （Mercury Injection, Nuclear Magnetic Resonance, Adsorption-Desorption, Scanning Emission Microscope, CT） when the shale oil and gas began to be effectively explored and be taken into account （Loucks et al., 2009; Christopher etal., 2012; Curtis et al., 2012; Lu et al., 2013）.

关键词： QUANTITATIVE research micropores MICROSTRUCTURE COMPUTED tomography SHALE gas

The Heterogeneities and Reservoirs Characterization of Shahezi Formation Tight Gas in Xujiaweizi Fault Depression

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Acta Geologica Sinica(English Edition) 2015年第A01期89卷 178-179页

作者： ZHANG Dazhi ZHANG Xiaodong YANG Buzeng WANG Xiaolian LIU Chao Exploration and Development Research Institute of Daqing Oilfield Company Ltd.

The tight sandstone gas prospecting is a key area of unconventional oil and gas exploration. The source rock of Shahezi Formation indicates adequate source condition for gas, which shows features of great thickness, wide distribution, high organic content and remaining high and overmature stages. Meantime, it possesses a reservoir condition with low porosity and low permeability, a conservation condition with good sealing, a well-matched migration condition, a favourable trap and good source reservoir caprock assemblage. It has qualifications for large-area tight gas reservoir.

关键词： MICROSTRUCTURE GAS reservoirs POROSITY micropores HYDRAULIC structures