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Research progress of catalysts for direct coal liquefaction

Journal of Energy Chemistry 2025年第1期 481-497页

作者： Wei Song penggao liu Xinyue Chen Ting Wang Chunrong He Rui Hao Kaiyu liu State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of Chemistry Xinjiang University College of Chemistry and Chemical Engineering Henan Polytechnic University Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering Central South University

Coal direct liquefaction technology is a crucial contemporary coal chemical technology for efficient and clean use of coal resources. The development of direct coal liquefaction technology and the promotion of alternative energy sources are important measures to guarantee energy security and economic security. However, several challenges need to be addressed, including low conversion rate, inadequate oil yield, significant coking, demanding reaction conditions, and high energy consumption. Extensive research has been conducted on these issues, but further exploration is required in certain aspects such as pyrolysis of macromolecules during the liquefaction process, hydrogen activation, catalysts' performance and stability, solvent hydrogenation, as well as interactions between free radicals to understand their mechanisms better. This paper presents a comprehensive analysis of the design strategy for efficient catalysts in coal liquefaction, encompassing the mechanism of coal liquefaction, catalyst construction,and enhancement of catalytic conversion efficiency. It serves as a comprehensive guide for further research endeavors. Firstly, it systematically summarizes the conversion mechanism of direct coal liquefaction, provides detailed descriptions of various catalyst design strategies, and especially outlines the catalytic mechanism. Furthermore, it addresses the challenges and prospects associated with constructing efficient catalysts for direct coal liquefaction based on an understanding of their action mechanisms.

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Rational modulation of emerging MXene materials for zinc-ion storage

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Carbon Energy 2022年第1期4卷 60-76页

作者： penggao liu Weifang liu Kaiyu liu Hunan Provincial Key Laboratory of Chemical Power Sources Central South UniversityChangshaChina College of Chemistry and Chemical Engineering Hunan UniversityChangshaChina

Currently,emerging battery technologies are being studied *** lack of ideal electrode materials remains a key hindrance to further development of new *** novel MXene material,due to its unique structural characteristics and physicochemical properties,shows the ability to enhance the electrochemical performance of the *** addition to the adjustable layer spacing,because of excellent electrical conductivity,rich chemical composition,and controllable surface chemistry,MXene has the potential for use in diverse applications as an ideal electrode material in various battery *** review covers the recent progress achieved in research of the zinc-ion energy storage of MXenes,including MXene-based cathodes,MXenederived cathodes,MXene-modified zinc anodes,and electrolyte ***,further structural design and reaction mechanisms of MXenes in zinc-ion storage are explored.

关键词： MXene-based materials MXenes zinc anode Zn-ion storage

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Rational design of nitrogen doped hierarchical porous carbon for optimized zinc-ion hybrid supercapacitors

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Nano Research 2019年第11期12卷 2835-2841页

作者： penggao liu Yang Gao Yangyang Tan Weifang liu Yanping Huang Jun Yan Kaiyu liu Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China Key Laboratory of Energy Materials Chemistry Ministry of EducationKey Laboratory of Advanced Functional MaterialsAutonomous RegionInstitute of Applied ChemistryXinjiang UniversityXinjiang830046China College of Materials Science and Engineering Fuzhou UniversityFuzhou350108China

Aqueous rechargeable zinc-ion hybrid supercapacitors are considered to be a promising candidate for large-scale energy storage devices owing to their high safety,long life,and low *** this paper,a nitrogen doped hierarchical porous carbon is evaluated as the cathode for aqueous rechargeable zinc-ion hybrid *** from the synergistic merits of excellent structural features of N-HPC and tiny zinc dendrite of Zn anode in ZnSO4 electrolyte,the zinc-ion hybrid supercapacitor exhibits excellent energy storage performance including high capacity of 136.8 mAh·g^−1 at 0.1·Ag^−1,high energy density of 191 Wh·kg^−1,large power density of 3,633.4 W·kg^−1,and satisfactory cycling stability of up to 5,000 cycles with a capacity retention of 90.9%.This work presents a new prospect of developing high-performance aqueous rechargeable zinc ion energy storage devices.

关键词： excellent performance zinc dendrite N-HPC zinc-ion Hybrid supercapacitors

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A zincophilic molecular brush for a dendrite-free,corrosionresistant,zinc metal anode with a long life cycle

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Nano Research 2024年第1期17卷 390-396页

作者： penggao liu Jia Guo Xinyue Chen Ting Wang Yanping Huang Shasha Gao Tao Wang Dongling Wu Kaiyu liu State Key Laboratory of Chemistry and Utilization of Carbon based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830017China Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Key Laboratory of New Low-carbon Green Chemical Technology School of Chemistry and Chemical EngineeringEducation Department of Guangxi Zhuang Autonomous RegionGuangxi UniversityNanning 530004China Key Laboratory of Microelectronics and Energy of Henan Province Department of Physics and Electronic EngineeringXinyang Normal UniversityXinyang 464000China Interdisciplinary Research Center for Sustainable Energy Science and Engineering(IRC4SE2) School of Chemical EngineeringZhengzhou UniversityZhengzhou 450001China

Zinc-based aqueous rechargeable batteries have attracted extensive attention due to their low cost,safety,and environmental ***,dendrite growth and hydrogen evolution of Zn anodes limit their large-scale application.A new strategy to produce a polyacrylamide/reduced graphene oxide(PAM@rGO)molecular nanobrush coating and control Zn electrolyte interface engineering is proposed for use in highly reversible Zn plating/*** evolution is inhibited,and Zn deposition is consolidated using the rich zincophilic functional groups of the branched polyacrylamide chain and the high conductivity of *** to the synergistic effects of corrosion resistance and dendrite-free growth,PAM@rGO/Zn provides prolonged and reversible Zn plating/*** functional theory(DFT)calculations expand on homogenized *** PAM@rGO/Zn||activated carbon(AC)capacitor exhibits long cyclic stability,fast ion transfer,and minimal interfacial *** study provides experimental and theoretical bases for the structural design of Zn anode.

关键词： zincophilic nanobrush polyacrylamide/reduced graphene oxide(PAM@rGO)/Zn surface modification Zn based energy storage

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基于朝向约束和重识别特征的目标轨迹关联方法

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北京航空航天大学学报 2022年第6期48卷 957-967页

作者：艾明晶单国志刘鹏高杨澎钢北京航空航天大学虚拟现实技术与系统国家重点实验室北京100083

基于检测关联和深度学习的目标轨迹关联方法是计算机视觉领域的研究热点之一,但现有方法设计中缺乏有效的时空约束,且目标表观特征泛化能力不足,在目标朝向差异明显的情况下会发生识别错误,在目标轨迹关联时会导致频繁的ID切换和错误关... 详细信息

基于检测关联和深度学习的目标轨迹关联方法是计算机视觉领域的研究热点之一,但现有方法设计中缺乏有效的时空约束,且目标表观特征泛化能力不足,在目标朝向差异明显的情况下会发生识别错误,在目标轨迹关联时会导致频繁的ID切换和错误关联。针对该问题,提出了一种基于朝向约束和重识别特征的目标轨迹关联方法。将行人朝向判别引入行人重识别中,提出了一种具有朝向约束力的行人重识别网络模型,提升了目标特征的表示能力。结合目标朝向、卡尔曼滤波得到的位置信息、重叠面积等时空特征,提出一种基于朝向约束的分层轨迹关联模型,得到单相机内的目标轨迹。在跨相机场景中,通过引入一种简单有效的双向竞争匹配机制,实现了目标轨迹的有效关联。实验结果表明:所提方法在MOT数据集上度量指标优于多种方法,能够减少频繁的ID交换,有效解决了相似目标相向而行时的错误关联;帧率达到19.6帧/s,能够满足近实时场景下的使用要求。

关键词：轨迹关联行人重识别多目标跟踪朝向约束时空约束

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Iron polyphthalocyanine-derived ternary-balanced Fe_(3)O_(4)/Fe_(3)N/Fe-N-C@PC-2.5 as a high-performance electrocatalyst for the oxygen reduction reaction

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Science China Materials 2021年第12期64卷 2987-2996页

作者： Rui Hao Jingjing Chen Zhenyu Wang Junjun Zhang Qingmeng Gan Yanfang Wang Yingzhi Li Wen Luo Zhiqiang Wang Huimin Yuan Chunliu Yan Wei Zheng Yanping Huang penggao liu Jun Yan Kaiyu liu Chen liu Zhouguang Lu Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Department of Materials Science and Engineering Guangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and TechnologyShenzhen 518055China Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China

The oxygen reduction reaction (ORR) is the cornerstone reaction of the cathode in metal±air batteries;however,slow kinetics requires high-performance catalysts to promote the *** (PPc) has a typical chemical cross-linking structure and uniformly dispersed metal active sites,but its poor activity and conductivity limit its applications as an ORR ***,a manageable and convenient strategy is proposed to synthesize ternary ORR catalysts through the low-temperature pyrolysis of Fe *** optimal catalyst,Fe_(3)O_(4)/Fe_(3)N/Fe-N-C@PC-2.5,exhibits excellent ORR activity in alkaline solution with a half-wave potential of 0.90 V,which is significantly higher than that of commercial 20%Pt/C (0.84 V).Electrochemical tests and extended X-ray absorption fine structure spectroscopy reveal that the superior ORR activity of Fe_(3)O_(4)/Fe_(3)N/Fe-N-C@PC-2.5 could be ascribed to the balance of its ternary components(i.e.,Fe_(3)O_(4),Fe_(3)N,and Fe-N;species).A Zn±air battery incorporating Fe_(3)O_(4)/Fe_(3)N/Fe-N-C@PC-2.5 as an air cathodic catalyst delivers a high open-circuit voltage and peak power *** galvanostatic discharge,the battery demonstrates a specific capacity of 815.7 mA h g^(-1).The facile strategy of using PPc to develop high-performance composite electrocatalysts may be expanded to develop new types of catalysts in the energy field.

关键词： metal polyphthalocyanine nonprecious catalyst hierarchical porous structure oxygen reduction reaction Zn–air battery

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Effects of coagulation-bath conditions on polyphenylsulfone ultrafiltration membranes

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Chinese Journal of Chemical Engineering 2021年第6期34卷 332-340页

作者： Zhenghui liu Jun Xiang Xiaoli Hu penggao Cheng Lei Zhang Wei Du Songbo Wang Na Tang Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization College of Chemical Engineering and Materials ScienceTianjin University of Science and TechnologyTianjin 300457China

Polyphenylsulfone(PPSU)ultrafiltration membrane with different structures was prepared by nonsolvent-induced phase *** effects of coagulation bath conditions(concentration and temperature)on membrane morphology,pure water flux,pore size,porosity,and contact angle were studied and discussed based on ternary-phase *** indicated that water had stronger coagulant power than ethanol,and that the morphology of the membrane prepared from the polyphenylsulfone/1-methyl-2-pyrrolidinone/H_(2)O(PPSU/NMP/H_(2)O)system had finger-like ***,sponge-like structures were observed for the PPSU/NMP/(NMP-H_(2)O)and PPSU/NMP/(70 NMP-EtOH-H_(2)O)*** also greatly influenced on membrane *** to the Scanning electronic microscopy(SEM)image,the composition(mass fraction)of casting solution is 16%PPSU-84%NMP and the coagulation bath consisting of 70%NMP-26%H_(2)O-4%C_(2)H_(5)***,the PPSU ultrafiltration membrane with spong-like was prepared under 8℃coagulation *** formation of sponge-like structure reduces the pure water flux of ppsu membrane from 488.39 L·m^(-2)·h^(-1)to 36.04 L·m^(-2)·h^(-1).It also reduces the gas permeability,porosity,and pore size of the *** addition of ethanol and NMP into the coagulation bath increases the roughness of the PPSU ultrafiltration membrane and reduces the hydrophilicity of the membrane.

关键词： PPSU ultrafiltration membrane Ternary-phase diagram Coagulation bath conditions Sponge-like structures

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Research of Recycled Salt and Glauber' Salt Precipitation Rules of Yabulai Salt Lake Brine

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 373-374页

作者： TANG Na liu Jianwei ZHANG Lei Xiang Jun CHENG penggao WANG Xuekui College of Marine Science and Engineering Tianjin University of Science & Technology Tianjin Key Laboratory of Marine Resources and Chemistry Tianjin University of Science & Technology

1 Introduction The main production of Yabulai salt lake was original salt and recycled salt many years *** decade’s production,the sale lake resource is more and more ***’s salt and magnesium salt are concentrated i... 详细信息

关键词： Yabulai salt lake precipitation rules of recycled salt glauber recycled salt phase diagram

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The Effect of Additives on Crystal Size of Sodium Sulphate

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 401-403页

作者： ZHANG Lei liu Shanhe XIANG Jun CHENG penggao TANG Na WANG Xuekui College of Marine Science and Engineering Tianjin University of Science & Technology Tianjin Key Laboratory of Marine Resources and Chemistry

1 Introduction Anhydrous sodium,mainly produced in the United States,Canada,Japan,is indispensable commodities and raw materials in daily life and *** recent years,anhydrous sodium sulfate of general size was much ove... 详细信息

关键词： Additive,Sodium sulphate Crystallization,Crystal size

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Suggestions on Promotion of FGD Industrialization of Thermal Power Plants

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Electricity 2006年第2期17卷 44-46页

作者： Zhao penggao Chu Xue（译） liu Wenying（审校） Department of Environment ＆ Resources Conservation. National Development and Reform Commission 不详

In order to thoroughly solve the problem of SO2 pollution and promote the sound development of thermal power FGD, this article proposes the technical principles of FGD process selection to standardize the supplying market and the post-assessment of FGD facilities. The selection principles can be detailed as: 1) the limestone-gypsum process is preferred in the case that the mass fraction of sulphur content in power coal is more than 1% and the capacity of a unit is no less than 200 MW. 2) the matured low-cost technologies such as dry or semi-dry processes are applicable in the case that the mass fraction of sulphur content in power coal is less than 1% and the capacity of a unit is less than 200 MW. 3) the seashore power plants with less than 1% mass fraction of sulphur content in power coal can take the seawater process into consideration.

关键词：热电厂 FGD 大气污染环境保护

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