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Conversion of polyethylene to gasoline: Influence of porosity and acidity of zeolites

Frontiers in Energy   Pages 763-774 doi: 10.1007/s11708-023-0897-1

Abstract: Herein a series of microporous and mesoporous zeolites were used to study the influence of porosity andThe effect of porosity and acidity on catalytic performance of zeolites was evaluated, which clearly

Keywords： plastics conversion     polyethylene     zeolites     acidity     porosity    

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A time−space porosity computational model for concrete under sulfate attack

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0985-7

Abstract: Nevertheless, little effort has been invested in exploring the temporal and spatial development of the porosityThis study proposes a mechanical–chemical model to simulate the spatiotemporal distribution of the porositycorrosion damage and cement hydration on the diffusion of sulfate ions, the expansion deformation and porosityThe proposed model can forecast and assess the porosity of concrete covers and provide a credible approach

Keywords： expansion deformation     porosity     internal expansion stress     external sulfate attack     mechanical–chemical    

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Tuning porosity of coal-derived activated carbons for CO2 adsorption

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 9,   Pages 1345-1354 doi: 10.1007/s11705-022-2155-1

Abstract: A simple method was developed to tune the porosity of coal-derived activated carbons, which provided

Keywords： coal-derived activated carbons     porosity     CO2 adsorption     molecular dynamics    

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Experimental studies on the influence of porosity on membrane absorption process

GAO Jian, REN Zhongqi, ZHANG Zeting, ZHANG Weidong

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 4,   Pages 385-389 doi: 10.1007/s11705-007-0070-0

Abstract: cylinder pore) and membrane thickness do not affect the membrane absorption process, and the membrane porosityHowever, the influence of porosity on the membrane absorption process became visible for fast mass transferThe results show that the influence of membrane porosity on mass transfer relates to flow condition,

Keywords： de-ionized     · L     different     membrane porosity     CO    

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Easily-manufactured paper-based materials with high porosity for adsorption/separation applications in

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 7,   Pages 830-839 doi: 10.1007/s11705-022-2267-7

Abstract: As a pore-forming agent, calcium citrate increased the porosity of the paper-based material from 30%

Keywords： adsorption     oil–water separation     underwater superoleophobicity     wastewater treatment    

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The ITZ microstructure, thickness, porosity and its relation with compressive and flexural strength of

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 191-201 doi: 10.1007/s11709-021-0792-y

Abstract: consequences to the compressive (Fc) and flexural strength (Ff), and porosity

Keywords： cement fineness     interfacial transition zone     compressive and flexural strength    

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Effect of process parameters on the density and porosity of laser melted AlSi10Mg/SiC metal matrix composite

Omotoyosi H. FAMODIMU, Mark STANFORD, Chike F. ODUOZA, Lijuan ZHANG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 4,   Pages 520-527 doi: 10.1007/s11465-018-0521-y

Abstract: reaction to laser melting and the fabrication of density blocks to investigate the relative density and porosity

Keywords： selective laser melting     additive manufacturing     mechanical alloying     powder metallurgy     aluminium metal matrix composite    

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Large-scale accumulation characteristic and distribution law of low porosity and permeability reservoir

Zhao Wenzhi,Wang Hongjun,Bian Congsheng,Wang Zecheng,Liu Guangdi

Strategic Study of CAE 2012, Volume 14, Issue 6,   Pages 31-39

Abstract:

Natural gas resource of low porosity and permeability reservoir is theThe distribution of low porosity and permeability gas reservoir is close to source , and reservoir combinationThe recognization of large scale gas accumulation of low porosity and permeability gas resources has

Keywords： low porosity and permeability reservoir     largescale gas accumulation     volume flow     diffusion flow     “pancake    

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Continuous modeling of soil morphology —thermomechanical behavior of embankment dams

Bettina ALBERS, Krzysztof WILMANSKI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 11-23 doi: 10.1007/s11709-010-0081-7

Abstract: problems, modeling of fluidization yielding piping, and generalizations of the Darcy law and changes of porosity

Keywords： thermomechanical modeling     soil morphology     saturation     porosity    

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Effect of Radial Porosity Oscillation on the Thermal Performance of Packed Bed Latent Heat Storage Article

H. B. Liu, C. Y. Zhao

Engineering 2021, Volume 7, Issue 4,   Pages 515-525 doi: 10.1016/j.eng.2020.05.020

Abstract: effect can impact the packing arrangement of phase change material (PCM) capsules, inducing radial porosityan actual-arrangement-based three-dimensional packed bed LHS model was built to consider the radial porositydirection in the packed bed, the corresponding relationships between the arrangement of capsules and porosityThe oscillating distribution of radial porosity led to a non-uniform distribution of heat transfer fluidThe results showed that different diameter ratios correspond to different radial porosity distributions

Keywords： Packed bed latent heat storage     Radial porosity oscillation     Fluid flow     Heat transfer     Diameter ratio    

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Porosity model for flows in CMP

ZHANG Chao-hui, YE Wei, LUO Jian-bin, WEN Shi-zhu

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 418-423 doi: 10.1007/s11465-006-0050-y

Abstract: In an effort to explore the contribution of the pad, which is usually full of pores, to the performance of CMP (chemical mechanical polishing), a three-dimensional flow model of CMP is presented by assuming that the fluids in the porous layer comply with Darcy s law, which states that the flow velocity is proportional to the pressure gradient and inverse proportional to the viscosity. The flow equation is deduced accordingly and, by taking advantage of the multilevel technique and line relaxation technique, numerical simulations are carried out to reveal the relationships between the load capacities and operational parameters (including pivot height, roll angle and pitch angle), under conditions with different porous parameters and different thicknesses of the porous layer. The little porous parameter will lead to a prominent increase of load capability (for instance, the load and the moment predicted), which is still augmented by the thicker layer parameter. This will result in a higher material removal ratio of CMP. A pad full of large pores will be used to deduce load capability, facilitating the free flow of the fluids through the pores. The research will add some insights on the mechanism of the CMP technique.

Keywords： multilevel technique     three-dimensional     proportional     research     thicker    

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Directional solidification of metal-gas eutectic and fabrication of regular porous metals

LIU Yuan, LI Yanxiang, WAN Jiang

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 180-183 doi: 10.1007/s11465-007-0030-x

Abstract: The process easily controls the porosity, the pore size, the pore orientation, and the pore morphology

Keywords： orientation     solid-gas eutectic     research     solidifying     porosity    

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Pore structure of cementitious material enhanced by graphitic nanomaterial: a critical review

S.A. GHAHARI, E. GHAFARI, L. ASSI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1,   Pages 137-147 doi: 10.1007/s11709-017-0431-9

Abstract: review on the effect of CNT on the pore and microstructure of cement composite with a discussion on the porosityThe existing methods of measuring the porosity of cementitious material are reviewed, in particular,

Keywords： carbon nano tubes     microstructure     porosity     mercury intrusion porosimetry     cement composite    

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Industrial bio-based plant aggregates as hygric and insulating construction materials for energy efficient building

Yunhong Jiang, Mike Lawrence, Meng Zhang, Jiandong Cui

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 10,   Pages 1532-1532 doi: 10.1007/s11705-020-1960-7

Abstract: In this paper, the bulk density, microstructure, porosity and pore size distribution of the selectedAll the selected aggregates had a low bulk density ranging from 30 to 130 kg∙m and a high porosity between

Keywords： bio-based aggregates     density     porosity     thermal conductivity     hygric properties    

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Applications of NMR to Oil Well Logging and Formation Evaluation

Xiao Lizhi,Xie Ranhong

Strategic Study of CAE 2003, Volume 5, Issue 9,   Pages 87-94

Abstract: The NMR information provides： 1,lithology-independent porosity; 2,clay bound water, capillary bound wateracute;s new publication, NMR logging principles are briefly introduced, applications case studies to porosity

Keywords： NMR     logging     formation evaluation     porosity     irreducible water     permeability    

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Title Author Date Type Operation

Conversion of polyethylene to gasoline: Influence of porosity and acidity of zeolites

Journal Article

A time−space porosity computational model for concrete under sulfate attack

Journal Article

Tuning porosity of coal-derived activated carbons for CO2 adsorption

Journal Article

Experimental studies on the influence of porosity on membrane absorption process

GAO Jian, REN Zhongqi, ZHANG Zeting, ZHANG Weidong

Journal Article

Easily-manufactured paper-based materials with high porosity for adsorption/separation applications in

Journal Article

The ITZ microstructure, thickness, porosity and its relation with compressive and flexural strength of

Journal Article

Effect of process parameters on the density and porosity of laser melted AlSi10Mg/SiC metal matrix composite

Omotoyosi H. FAMODIMU, Mark STANFORD, Chike F. ODUOZA, Lijuan ZHANG

Journal Article

Large-scale accumulation characteristic and distribution law of low porosity and permeability reservoir

Zhao Wenzhi,Wang Hongjun,Bian Congsheng,Wang Zecheng,Liu Guangdi

Journal Article

Continuous modeling of soil morphology —thermomechanical behavior of embankment dams

Bettina ALBERS, Krzysztof WILMANSKI

Journal Article

Effect of Radial Porosity Oscillation on the Thermal Performance of Packed Bed Latent Heat Storage

H. B. Liu, C. Y. Zhao

Journal Article

Porosity model for flows in CMP

ZHANG Chao-hui, YE Wei, LUO Jian-bin, WEN Shi-zhu

Journal Article

Directional solidification of metal-gas eutectic and fabrication of regular porous metals

LIU Yuan, LI Yanxiang, WAN Jiang

Journal Article

Pore structure of cementitious material enhanced by graphitic nanomaterial: a critical review

S.A. GHAHARI, E. GHAFARI, L. ASSI

Journal Article

Industrial bio-based plant aggregates as hygric and insulating construction materials for energy efficient building

Yunhong Jiang, Mike Lawrence, Meng Zhang, Jiandong Cui

Journal Article

Applications of NMR to Oil Well Logging and Formation Evaluation

Xiao Lizhi,Xie Ranhong

Journal Article