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ADSORPTION DYNAMICS OF MACROPOROUS POLYMERIC ADSORBENT I.The Studies on the Particle Diffusion Mass-Transfer Process 被引量:2
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作者 WANG Chunhong XU Mingcheng +2 位作者 SHI Zuoqing FAN Yunge JI Chengjie 《Chinese Journal of Reactive Polymers》 2000年第1期81-89,共9页
The adsorption dynamics for phenol in aqueous solution of the adsorbent based on polystyrene was studied. In order to distinguish with the Boyd quasi-homogeneous model of the inner structure of ion-exchanger, the part... The adsorption dynamics for phenol in aqueous solution of the adsorbent based on polystyrene was studied. In order to distinguish with the Boyd quasi-homogeneous model of the inner structure of ion-exchanger, the particle diffusion model including surface diffusion model and pore diffusion model was suggested which is suitable to the macroporous adsorbent. The diffusiondetermination step of the adsorption process was established and the effective diffusion coefficient was also determined. The influence of surface diffusion and pore diffusion on the particle diffusion rate was investigated qualitatively. All of these were very important to improve the structure of the macroporous adsorbent in order to improve the mass-transfer rate. 展开更多
关键词 adsorption Dynamics. Particle diffusion Surface diffusion Particle diffusion diffusion Coefficient
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Regulated adsorption-diffusion and enhanced charge transfer in expanded graphite cohered with N,B bridge-doping carbon patches to boost K-ion storage
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作者 Haiyan Wang Haowen Du +5 位作者 Hucheng Zhang Songjie Meng Zhansheng Lu Hao Jiang Chunzhong Li Jianji Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第1期67-74,I0003,共9页
The great challenges are remained in constructing graphite-based anode with well built-in structures to accelerate kinetics and enhance stability in the advanced K-ion batteries(KIBs).Here,we firstly report the design... The great challenges are remained in constructing graphite-based anode with well built-in structures to accelerate kinetics and enhance stability in the advanced K-ion batteries(KIBs).Here,we firstly report the design of expanded graphite cohered by N,B bridge-doping carbon patches(NBEG)for efficient K-ion adsorption/diffusion and long-term durability.It is the B co-doping that plays a crucial role in maximizing doping-site utilization of N atoms,balancing the adsorption-diffusion kinetics,and promoting the charge transfer between NBEG and K ions.Especially,the robust lamellar structure,suitable interlayer distance,and rich active sites of the designed NBEG favor the rapid ion/electron transfer pathways and high K-ion storage capacity.Consequently,even at a low N,B doping concentration(4.36 at%,2.07 at%),NBEG anode shows prominent electrochemical performance for KIBs,surpassing most of the advanced carbon-based anodes.Kinetic studies,density functional theory simulations,and in-situ Raman spectroscopy are further performed to reveal the K-ion storage mechanism and confirm the critical actions of co-doping B.This work offers the new methods for graphite-electrode design and the deeper insights into their energy storage mechanisms in KIBs. 展开更多
关键词 Heteroatom dual-doping Graphite anodes K-ion batteries adsorption and diffusion energy Charge transfer
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A Reynolds mass flux model for gas separation process simulation:Ⅱ.Application to adsorption on activated carbon in a packed column 被引量:2
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作者 李文彬 余国琮 +1 位作者 袁希钢 刘伯潭 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第8期1245-1255,共11页
Simulations of adsorption process using the Reynolds mass flux model described in Part I of these serial articles are presented. The object of the simulation is the methylene chloride adsorption in a packed column(0.0... Simulations of adsorption process using the Reynolds mass flux model described in Part I of these serial articles are presented. The object of the simulation is the methylene chloride adsorption in a packed column(0.041 m id,packed with spherical activated carbon up to a length of 0.2 m). With the Reynolds mass flux model,breakthrough/regeneration curves, concentration and temperature as well as the velocity distributions can be obtained. The simulated results are compared with the experimental data reported in the literature and satisfactory agreement is found both in breakthrough/regeneration curves and temperature curves. Moreover,the anisotropic turbulent mass diffusion is characterized and discussed. 展开更多
关键词 Simulation adsorption Mass transfer Anisotropic turbulent mass diffusion Packed bed
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Revisiting the Role of Physical Confinement and Chemical Regulation of 3D Hosts for Dendrite-Free Li Metal Anode 被引量:3
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作者 Shufen Ye Xingjia Chen +8 位作者 Rui Zhang Yu Jiang Fanyang Huang Huijuan Huang Yu Yao Shuhong Jiao Xiang Chen Qiang Zhang Yan Yu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第11期290-306,共17页
Lithium metal anode has been demonstrated as the most promising anode for lithium batteries because of its high theoretical capacity,but infinite volume change and dendritic growth during Li electrodeposition have pre... Lithium metal anode has been demonstrated as the most promising anode for lithium batteries because of its high theoretical capacity,but infinite volume change and dendritic growth during Li electrodeposition have prevented its practical applications.Both physical morphology confinement and chemical adsorption/diffusion regulation are two crucial approaches to designing lithiophilic materials to alleviate dendrite of Li metal anode.However,their roles in suppressing dendrite growth for long-life Li anode are not fully understood yet.Herein,three different Ni-based nanosheet arrays(NiO-NS,Ni_(3)N-NS,and Ni_(5)P_(4)-NS)on carbon cloth as proof-of-concept lithiophilic frame-works are proposed for Li metal anodes.The two-dimensional nanoarray is more promising to facilitate uniform Li^(+)flow and electric field.Compared with the NiO-NS and the Ni_(5)P_(4)-NS,the Ni_(3)N-NS on carbon cloth after reacting with molten Li(Li-Ni/Li_(3)N-NS@CC)can afford the strongest adsorption to Li+and the most rapid Li+diffusion path.Therefore,the Li-Ni/Li_(3)N-NS@CC electrode realizes the lowest overpotential and the most excellent electrochemical performance(60 mA cm^(−2)and 60 mAh cm^(−2)for 1000 h).Furthermore,a remarkable full battery(LiFePO_(4)||Li-Ni/Li_(3)N-NS@CC)reaches 300 cycles at 2C.This research provides valuable insight into designing dendrite-free alkali metal batteries. 展开更多
关键词 Li metal anodes 3D carbon framework Ni-based nanosheets Physical morphology confinement Chemical adsorption/diffusion regulation
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Theoretical Study on Adsorption and Diffusion of N Atoms on Cu Low-index Surface 被引量:1
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作者 刁兆玉 张晓明 +1 位作者 王泽新 韩玲利 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2004年第11期1225-1230,共6页
The adsorption and diffusion of N atoms on the three low-index Cu planes were studied using 5-parameter Morse potential (5-MP) method, and the best theory-experiment agreement was obtained. N atom of Cu(100) surface s... The adsorption and diffusion of N atoms on the three low-index Cu planes were studied using 5-parameter Morse potential (5-MP) method, and the best theory-experiment agreement was obtained. N atom of Cu(100) surface sit on the fourfold hollow site with the vertical height of 0.018 nm closely coplanar with the topmost copper layer, and the four CuN bond lengths are 0.182 nm and the fifth CuN distance is 0.199 nm. For Cu(111) system, the existence of aberrant Cu(100) reconstructed structure is approved at higher coverage, and at low coverage the structure is almost an ideal Cu(111) surface structure. With respect to Cu(110) system, the N atoms are adsorbed at LB and H3 sites, not at SB site. The diffusion passage and diffusion barrier of adsorbed N atoms were also studied. 展开更多
关键词 5-MP adsorption and diffusion potential energy surface structure
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Adsorption and Diffusion of Hydrogen Atoms on Stepped Ni (115) Surface
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作者 王泽新 郝策 +3 位作者 于晓安 刘长刚 张积树 陈宗淇 《Chinese Science Bulletin》 SCIE EI CAS 1994年第3期262-263,共2页
We have introduced a 5-parameter Morse function to simulate the pairwise poten-tial and studied the adsorption and diffusion of hydrogen atoms on the Ni low indexsurfaces by pairwise method and satistying results were... We have introduced a 5-parameter Morse function to simulate the pairwise poten-tial and studied the adsorption and diffusion of hydrogen atoms on the Ni low indexsurfaces by pairwise method and satistying results were obtained. In this letter,we further investigate the properties of the adsorption and diffusion of hydrogen at-oms on the Ni (115) stepped surface by the same method and the optimumparameters. 展开更多
关键词 SURFACE adsorption and diffusion of Hydrogen Atoms on Stepped Ni
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Adsorption of benzene, cyclohexane and hexane on ordered mesoporous carbon 被引量:18
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作者 Gang Wang Baojuan Dou +3 位作者 Zhongshen Zhang Junhui Wang Haier Liu Zhengping Hao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2015年第4期65-73,共9页
Ordered mesoporous carbon(OMC) with high specific surface area and large pore volume was synthesized and tested for use as an adsorbent for volatile organic compound(VOC)disposal. Benzene, cyclohexane and hexane w... Ordered mesoporous carbon(OMC) with high specific surface area and large pore volume was synthesized and tested for use as an adsorbent for volatile organic compound(VOC)disposal. Benzene, cyclohexane and hexane were selected as typical adsorbates due to their different molecular sizes and extensive utilization in industrial processes. In spite of their structural differences, high adsorption amounts were achieved for all three adsorbates, as the pore size of OMC is large enough for the access of these VOCs. In addition, the unusual bimodal-like pore size distribution gives the adsorbates a higher diffusion rate compared with conventional adsorbents such as activated carbon and carbon molecular sieve. Kinetic analysis suggests that the adsorption barriers mainly originated from the difficulty of VOC vapor molecules entering the pore channels of adsorbents. Therefore, its superior adsorption ability toward VOCs, together with a high diffusion rate, makes the ordered mesoporous carbon a promising potential adsorbent for VOC disposal. 展开更多
关键词 Volatile organic compounds adsorption Ordered mesoporous carbon Isosteric heat of adsorption Knudsen diffusion
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