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A Combination of N2 and CO2 Adsorption to Characterize Nanopore Structure of Organic-Rich Lower Silurian Shale in the Upper Yangtze Platform, South China： Implications for Shale Gas sorption capacity

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Acta Geologica Sinica(English Edition) 2017年第4期91卷 1380-1394页

作者： CHEN Lei JIANG Zhenxue LIU Keyu GAO Fenglin WANG Pengfei State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China Unconventional Natural Gas Institute China University of Petroleum Beijing 102249 China Unconventional Oil & Gas Cooperative Innovation Center China University of Petroleum Beijing 102249 China CSIRO Earth Science and Resource Engineering Bentley WA 6102 Australia School of Geosciences China University of Petroleum Qingdao 266580 Shandong China

The pores in shales are mainly of nanometer-scale, and their pore size distribution is very important for the preservation and exploitation of shale gas. This study focused on the organic-rich Lower Silurian black shale from four wells in the Upper Yangtze Platform, and their TOC, mineralogical composition and pore characterization were investigated. Low pressure N2 and CO2 adsorption were conducted at 77.35 K and 273.15 K, respectively, and the pore structures were characterized by modified Brunauer-Emmett-Teller （BET）, Dubinin-Radushkevich （DR）, t-plot, Barrett- Joyner-Halenda （BJH） and density functional theory （DFT） methods and then the relationship between pore structure and shale gas sorption capacity was discussed. The results indicate that （1） The Lower Silurian shale has high TOC content of 0.92%~96%, high quartz content of 30.6%-69.5%, and high clays content of 24.1%-51.2%. The total specific surface area varies from 7.56 m^2/g to 25.86 m^2/g. Both the total specific surface area and quartz content are positively associated with the TOC content. （2） Shale samples with higher TOC content have more micropores, which results in more complex nanopore structure. Micropore volumes/surface areas and non-micropore surface areas all increase with the increasing TOC content. （3） A combination of N2 and CO2 adsorption provides the most suitable detection range （~0.3-60 nm） and has high reliability and accuracy for nanopore structure characterization. （4） The TOC content is the key factor to control the gas sorption capacity of the Lower Silurian shale in the Upper Yangtze Platform.

关键词： shale gas nanopore structure Lower Silurian shale Upper Yangtze Platform sorption capacity

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In-situ gas contents of a multi-section coal seam in Sydney basin for coal and gas outburst management

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International Journal of Coal Science & Technology 2023年第4期10卷 34-46页

作者： Zhongbei Li Ting Ren Dennis Black Ming Qiao Itmam Abedin Jessica Juric Mike Wang School of Civil MiningEnvironmental and Architectural EngineeringUniversity of WollongongWollongongNSW 2522Australia South32–Illawarra Metallurgical Coal WollongongNSW 2526Australia School of Safety Engineering China University of Mining and TechnologyXuzhou 221116China

The gas content is crucial for evaluating coal and gas outburst potential in underground coal mining. This study focuses on investigating the in-situ coal seam gas content and gas sorption capacity in a representative coal seam with multiple sections (A1, A2, and A3) in the Sydney basin, where the CO_(2) composition exceeds 90%. The fast direct desorption method and associated devices were described in detail and employed to measure the in-situ gas components (Q_(1), Q_(2), and Q_(3)) of the coal seam. The results show that in-situ total gas content (Q_(T)) ranges from 9.48 m^(3)/t for the A2 section to 14.80 m^(3)/t for the A3 section, surpassing the Level 2 outburst threshold limit value, thereby necessitating gas drainage measures. Among the gas components, Q_(2) demonstrates the highest contribution to Q_(T), ranging between 55% and 70%. Furthermore, high-pressure isothermal gas sorption experiments were conducted on coal samples from each seam section to explore their gas sorption capacity. The Langmuir model accurately characterizes CO_(2) sorption behavior, with ft coefcients (R^(2)) greater than 0.99. Strong positive correlations are observed between in-situ gas content and Langmuir volume, as well as between residual gas content (Q_(3)) and sorption hysteresis. Notably, the A3 seam section is proved to have a higher outburst propensity due to its higher Q_(1) and Q_(2) gas contents, lower sorption hysteresis, and reduced coal toughness f value. The insights derived from the study can contribute to the development of efective gas management strategies and enhance the safety and efciency of coal mining operations.

关键词： In-situ coal seam gas content Direct desorption method Gas component sorption capacity Coal and gas outburst

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Sponge-based materials for oil spill cleanups: A review

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Frontiers of Chemical Science and Engineering 2020年第5期14卷 749-762页

作者： Edward Mohamed Hadji Bo Fu Ayob Abebe Hafiz Muhammad Bilal Jingtao Wang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China College of chemical engineering Nanjing Forestry UniversityNanjing 210037China

Elimination of leaked oil from aquatic environs has recently gained importance owing to the disasters associated with leakages into marine environments.The need for an environmentally friendly and viable line of action concerning the environs has brought forward numerous affordable,non-toxic,and decomposable materials;further,diverse biomasses for fabricating nano-to micro-scale materials,membranes,and sponges/aerogels have also been incorporated for the elimination and retrieval of oils from water.Moreover,selectivity,sorption capacity,and reusability of these materials after the retrieval of oils are also desired from the viewpoint of sustainability.This review encompasses the recent progress in the field of elimination and retrieval of oil spills using various sponge-based materials.

关键词： membranes sponges reusability sorbents selectivity sorption capacity

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Preparation of Ti-Mo getters by injection molding

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Rare Metals 2009年第2期28卷 147-150页

作者： Zhao, Zhenmei Wei, Xiuying Xiong, Yuhua Mao, Changhui Institute of the Advanced Electronic Materials Beijing General Research Institute for Nonferrous Metals Beijing 100088 China

Ti-Mo getters have been fabricated via metal injection molding (MIM) using three kinds of Ti powders with different mean particle sizes of 46 μm,35 μm and 26 μm,respectively. The surface morphology,porosity,and hydrogen sorption properties of Ti-Mo getters formed by MIM using paraffin wax as a principal binder constituent were examined. It has been proven that the powder injection molding is a viable forming technique for porous Ti-Mo getters. The particle size of Ti powders and the powder loading influence the porosity of getters,and this affects the sorption capacity of Ti-Mo getters. Ti-Mo getters produced with the Ti powders possessing a mean particle size of 35 μm using a powder loading of 40 vol.% have a high porosity,resulting in a good sorption capacity.

关键词： materials physics and chemistry metal injection molding Ti-Mo getter sorption capacity loading porosity

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Oil spill cleanup from sea water by carbon nanotube sponges

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Frontiers of Materials Science 2013年第2期7卷 170-176页

作者： Ke ZHU Yuan-Yuan SHANG Peng-Zhan SUN Zhen LI Xin-Ming LI Jin-Quan WEI Kun-Lin WANG De-Hai WU An-Yuan CAO Hong-Wei ZHU School of Materials Science and Engineering Tsinghua University Beijing 100084 China Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China Center for Nano and Micro Mechanics Tsinghua University Beijing 10008i China

Oil spills in the sea have caused many serious environmental problems worldwide. In this study, carbon nanotube （CNT） sponges were used to cleanup oil slicks on sea waters. This method was compared with two traditional representative sorbents, including polypropylene fiber fabric and woolen felt. The CNT sponges had a larger oil sorption capacity than the other two sorbents. The maximum oil sorption capacity （Qm） of the CNT sponge was 92.30 g/g, which was 12 to 13.5 times larger than the Qm of the other two sorbents （the Qm of the polypropylene fiber fabric and woolen felt were 7.45 and 6.74 g/g, respectively）. In addition, unlike the other two sorbents, the CNT sponge was super- hydrophobic and did not adsorb any water during oil spill cleanup. CNT sponges are potentially very useful for cleaning up oil spills from sea water.

关键词： carbon nanotube （CNT） sponge oil spill sorption capacity sea water

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Determination of Lead(II) in Liver Corpse of a Slaughtered Cattle with Preconcentration on a Chelating Sorbent

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American Journal of Analytical Chemistry 2016年第8期7卷 617-622页

作者： R. A. Aliyeva N. S. Huseynova Ulviya M. Abilova G. B. İskandarov F. M. Chiragov Department of Analytical Chemistry Faculty of Chemistry Baku State University Baku Azerbaijan Department of the General and Toxicological Chemistry Faculty of Pharmacology Azerbaijan Medical University Baku Azerbaijan

The copolymer of the maleic anhydride-styrene is modified at the presence of 4-amino-2-thiouracil and formaldehyde and the new polymeric sorbate with spatial structure is received. The received sorbate is identified by the IR-spectroscopy method. The complete static sorption capacitance was studied (CSSC+K= 7.8 mmol/g) and the ionization constants of ionic groups in a sorbate link was defined by electrometric method. Ionization constants were determined by potentiometric titration of the sorbent (). sorption and desorption of the received sorbent with a lead ion (II) are investigated and optimum concentration conditions are defined: рНopt. = 5, ionic force μ = 0.8 pier/l, full sorption balance 4 hours, optimum eluent 5 ml of 0.5 M HCl.

关键词： sorption capacity Preconcentration Polymeric Sorbate Lead(II)

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Na/K two-componentliquid doped lithium silicate for CO2 high temperature capture

Na/K two-componentliquid doped lithium silicate for CO2 high...

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2014中国功能材料科技与产业高层论坛

作者： Xianfei Zeng Xin Xu Jianxin Deng Yang Zhou Wenhui Ma Kai Liu Yi Wang Damin Zheng Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province/The National Engineering Laboratory for Vacuum Metallurgy Kunming University of Science and Technology Guangxi Key Lab of Manufacturing System & Advanced Manufacturing Technology/School of Mechanical Engineering Guangxi University

The different Na/K two-component liquid doping lithium orthosilicate(LiNaKSiO)were synthesized by citric acid-assisted sol-gel methods and characterized by XRD and SEM.The sorption capacity of CO of LiNaKSiO was investigated by TG analysis under a gas stream containing 50%CO and50%N in a wide range from room temperature to900℃.The results indicated that the sorption of COfor the different Na/K doping lithium orthosilicate was carried out between 480-700℃and the maximum sorption of CO was obtained at about 700℃.The optimum ratio of Na/K doping lithium orthosilicate was determined to be 1:1(LiNaKSiO)and the maximum sorption of CO can reach up to 30.7%(g/g)under the condition of optimum Na/K doping ratio.

关键词： Lithium orthosilicate Na/K doping CO2 capture sorption capacity

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