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Artykuły w czasopismach na temat „Effective microporosity”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Moyer, J. D., T. R. Gaffney, J. N. Armor, and C. G. Coe. "Defining effective microporosity in carbon molecular sieves." Microporous Materials 2, no. 4 (1994): 229–36. http://dx.doi.org/10.1016/0927-6513(93)e0057-n.

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Wang, Congcong, Wei Wang, Jian Wang, et al. "Effective removal of aromatic pollutants via adsorption and photocatalysis of porous organic frameworks." RSC Advances 10, no. 53 (2020): 32016–19. http://dx.doi.org/10.1039/d0ra05724j.

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Kim, Hee-Soo, and Ji-Joon Kim. "Predicting Grain Structure in Continuously-Cast Stainless Steel Slab." Korean Journal of Metals and Materials 61, no. 1 (2023): 60–68. http://dx.doi.org/10.3365/kjmm.2023.61.1.60.

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Macrostructural features in continuously-cast stainless steel slabs such as the distribution of equiaxed and columnar grains, and microporosity, are crucial to the post-processes, and the mechanical properties of the final steel products. Among the methods for controlling grain structure during the continuous casting process, the application of electromagnetic stirring (EMS) during casting is known to alter the grain structure of the slab. In this study, we predicted macrostructural features in a continuous-cast stainless steel slab using computer simulation. We approximated the heat transfer

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Miller, Kevin, Tiziana Vanorio, Sam Yang, and Xianghui Xiao. "A scale-consistent method for imaging porosity and micrite in dual-porosity carbonate rocks." GEOPHYSICS 84, no. 3 (2019): MR115—MR127. http://dx.doi.org/10.1190/geo2017-0812.1.

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Unlike many other clastic rocks, relating velocity and permeability to porosity for micrite-bearing carbonate rocks has been largely unsuccessful. Recent studies have shown that additional parameters, most notably the distribution and/or proportion of micrite, can be used to parameterize the velocity and permeability behavior. However, there is currently no scale-consistent, 3D methodology for differentiating macroporosity and microporosity from the total porosity measured on bench-top laboratory equipment. Previous studies estimated microporosity and micrite content by combining total porosit

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5

Setiawan, Grace Caroline, Adelia Tinisia, Muhammad Galang Adhinata Abdul Rahim, Fitria Rahmitasari, and Widyasri Prananingrum. "Tegillarca granosa shell combination with Vitis vinifera and fluoride in decreasing enamel microporosity." Dental Journal 57, no. 2 (2024): 131–38. http://dx.doi.org/10.20473/j.djmkg.v57.i2.p131-138.

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Background: White spot lesion is a demineralization process indicated by the increased of enamel microporosity. A tegillarca granosa shell contains 98.7% calcium and Vitis vinifera contains phytochemical compounds with fluoride, which has a potential to stimulate remineralization. Purpose: To analyze the Tegillarca granosa shell combination with Vitis vinifera and fluoride in decreasing enamel microporosity. Methods: The cream was prepared by combining 10% and 20% Tegillarca granosa shell with 10 grams of Vitis vinifera extract and 100 mg of fluoride. The cream was tested beforehand for viscoc

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6

Cid, H. E., G. Carrasco-Núñez, and V. C. Manea. "Improved method for effective rock microporosity estimation using X-ray microtomography." Micron 97 (June 2017): 11–21. http://dx.doi.org/10.1016/j.micron.2017.01.003.

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Fuoco, Alessio, Carmen Rizzuto, Elena Tocci, et al. "The origin of size-selective gas transport through polymers of intrinsic microporosity." Journal of Materials Chemistry A 7, no. 35 (2019): 20121–26. http://dx.doi.org/10.1039/c9ta07159h.

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Polymers of intrinsic microporosity (PIMs) are distinguished from other polymers in how the diffusion coefficients for light gases depend on their effective size, with a stronger size-selective trend for gases larger than He and H<sub>2</sub>.

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8

Bonifasi-Lista, Carlos, and Elena Cherkaev. "Analytical relations between effective material properties and microporosity: Application to bone mechanics." International Journal of Engineering Science 46, no. 12 (2008): 1239–52. http://dx.doi.org/10.1016/j.ijengsci.2008.06.011.

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9

Sen, Pabitra N. "Resistivity of partially saturated carbonate rocks with microporosity." GEOPHYSICS 62, no. 2 (1997): 415–25. http://dx.doi.org/10.1190/1.1444152.

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Simple Archie's relations relate average conductivity to average porosity and average saturation, and seem to work when the fluctuations of local porosity and local saturation are small. In general, carbonates are extremely inhomogeneous and Archie's relations fail—the saturation exponent n can depend on saturation itself, and n can be anomalously large or small. The resistivity of rocks with a mixture of micropores, macropores, and vugs is computed using effective medium theories. Quantitative mathematical modeling is used to study the influence of textural details. Geometries that lead to an

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10

Kiełbasa, Karolina, Şahin Bayar, Esin Apaydin Varol, et al. "Carbon Dioxide Adsorption over Activated Carbons Produced from Molasses Using H2SO4, H3PO4, HCl, NaOH, and KOH as Activating Agents." Molecules 27, no. 21 (2022): 7467. http://dx.doi.org/10.3390/molecules27217467.

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Cost-effective activated carbons for CO2 adsorption were developed from molasses using H2SO4, H3PO4, HCl, NaOH, and KOH as activating agents. At the temperature of 0 °C and a pressure of 1 bar, CO2 adsorption equal to 5.18 mmol/g was achieved over activated carbon obtained by KOH activation. The excellent CO2 adsorption of M-KOH can be attributed to its high microporosity. However, activated carbon prepared using HCl showed quite high CO2 adsorption while having very low microporosity. The absence of acid species on the surface promotes CO2 adsorption over M-HCl. The pore size ranges that are

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11

Kim, Hyun Jong, and Hansu Kim. "Li Metal Anode Stabilized By Artificial Solid Interphase with Polymers of Intrinsic Microporosity." ECS Meeting Abstracts MA2022-01, no. 4 (2022): 549. http://dx.doi.org/10.1149/ma2022-014549mtgabs.

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Lithium metal has drawn attention as one of the most promising anode materials because of its highest specific capacity and lowest working potential. However, poor capacity retention and dendrite formation during cycling mainly caused by high chemical reactivity of Li metal with the electrolyte still remain challenges for practical battery application. In this presentation, we demonstrate that polymers of intrinsic microporosity(PIM-1) is highly effective in stabilizing the interface between Li metal anode and the electrolyte as an artificial solid interphase using various analytical technique

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Cameán, Ignacio, Belén Lobato, Rachelle Omnée, Encarnación Raymundo-Piñero, and Ana B. García. "Optimization of Textural and Structural Properties of Carbon Materials for Sodium Dual-Ion Battery Electrodes." Molecules 30, no. 11 (2025): 2439. https://doi.org/10.3390/molecules30112439.

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Sodium dual-ion batteries combine economic and environmental benefits by using carbon materials in both electrodes and sodium compounds in the electrolyte. Among other factors, their successful implementation for energy storage relies on optimization of the properties of the carbon electrode materials. To this end, carbon materials with a wide range of textural and structural properties were prepared by simply heat treating a single porous carbon in the absence or presence of a low-cost highly effective iron-based catalyst. These materials were investigated as anode or cathode in the sodium du

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13

Valiyeva, Asmer. "EFFECTIVE MODIFICATION OF NaX ZEOLITE WITH Ni METAL AND ITS CATALYTIC PERFORMANCE IN OXIDATION OF ETHANOL." New Materials, Compounds and Applications 9, no. 1 (2025): 123–33. https://doi.org/10.62476/nmca.91123.

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The presented data showed that the chemical treatment of NaX with Nichel medium resulted in the formation of highly developed hierarchical structures. The esterification of the hydroxyl groups by metal allowed modifying the hydrophobicity of zeolite surface and obtaining truly micro/mesoporous material. The preservation of microporous characteristics was confirmed by XRD and low temperature nitrogen sorption studies. Detailed information on acidic properties of mesoporous titanosilicalites was delivered by IR studies of ethanol oxidation and implicitly from EPR investigations. Well-developed i

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14

Lloyd, Mukosha, S. Onyango Maurice, Ochieng Aoyi, and Siame John. "Effective Microporosity for Enhanced Adsorption Capacity of Cr (VI) from Dilute Aqueous Solution: Isotherm and Kinetics." Chemical Science International Journal 19, no. 4 (2017): 1–12. https://doi.org/10.9734/CSJI/2017/34082.

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The adsorbent pore structure significant to enhanced adsorption capacity of Cr (VI) from dilute aqueous solution is evaluated. As reference, low-cost micro-mesoporous activated carbon (AC) of high basicity, mesoporosity centred about 2.4 nm, and effective microporosity centred about 0.9 nm was tested for removal of Cr (VI) from dilute aqueous solution in batch mode. At pH 2 the low-cost AC exhibited highly improved Langmuir Cr (VI) capacity of 115 mg/g which was competitive to high performance commercial AC. A Comparison with treated characterization results of literature adsorbents/ACs showed

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15

Ma, Yao, Nicholas C. Bruno, Fengyi Zhang, M. G. Finn, and Ryan P. Lively. "Zeolite-like performance for xylene isomer purification using polymer-derived carbon membranes." Proceedings of the National Academy of Sciences 118, no. 37 (2021): e2022202118. http://dx.doi.org/10.1073/pnas.2022202118.

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Polymers of intrinsic microporosity (PIMs) have been used as precursors for the fabrication of porous carbon molecular sieve (CMS) membranes. PIM-1, a prototypical PIM material, uses a fused-ring structure to increase chain rigidity between spirobisindane repeat units. These two factors inhibit effective chain packing, thus resulting in high free volume within the membrane. However, a decrease of pore size and porosity was observed after pyrolytic conversion of PIM-1 to CMS membranes, attributed to the destruction of the spirocenter, which results in the “flattening” of the polymer backbone an

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16

Mukosha, Lloyd, Maurice Onyango, Aoyi Ochieng, and John Siame. "Effective Microporosity for Enhanced Adsorption Capacity of Cr (VI) from Dilute Aqueous Solution: Isotherm and Kinetics." Chemical Science International Journal 19, no. 4 (2017): 1–12. http://dx.doi.org/10.9734/csji/2017/34082.

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Bradke, M. V., W. Schnurnberger, and I. Seybold. "Surface microstructure on Raney nickel catalysts." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 4 (1990): 272–73. http://dx.doi.org/10.1017/s0424820100174497.

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Raney nickel is a favorite electrocatalyst for alkaline water electrolysis and fuel cells. The good electrochemical properties of this material result from its very fine porosity giving the electrodes a large effective surface. Usually the microstructure is formed by chemical etching of a nickel alloy, leaving back a highly porous electrode consisting of nearly pure nickel. It is well known that the total effective surface can considerably vary depending on the etching process, but up to now the understanding of the influence of all etching parameters on the resulting pore structure is quite a

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18

Malahov, Aleksei O., Emil R. Saifullin, Mikhail A. Varfolomeev, et al. "Screening of Surfactants for Flooding at High-Mineralization Conditions: Two Production Zones of Carbonate Reservoir." Energies 15, no. 2 (2022): 411. http://dx.doi.org/10.3390/en15020411.

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The selection of effective surfactants potentially can mobilize oil up to 50% of residuals in mature carbonate oilfields. Surfactants’ screening for such oilfields usually is complicated by the high salinity of water, high lipophilicity of the rock surface, and the heterogeneous structure. A consideration of features of the oilfield properties, as well as separate production zones, can increase the deep insight of surfactants’ influence and increase the effectiveness of surfactant flooding. This article is devoted to the screening of surfactants for two production zones (Bashkirian and Vereian

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19

Wu, Wei-Hsuan, Paul Thomas, Paul Hume, and Jianyong Jin. "Effective Conversion of Amide to Carboxylic Acid on Polymers of Intrinsic Microporosity (PIM-1) with Nitrous Acid." Membranes 8, no. 2 (2018): 20. http://dx.doi.org/10.3390/membranes8020020.

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AVCU, Melda, and Meryem YEŞİLOT KAPLAN. "MICROPOROSITY CHANGES WITH ACIDIZING EFFECT IN SANDSTONES (KIZILDERE FORMATION-HATAY/S-TURKEY)." Carpathian Journal of Earth and Environmental Sciences 16, no. 1 (2021): 67–76. http://dx.doi.org/10.26471/cjees/2021/016/156.

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This study aims to determine the field and petrographic properties of sandstones observed in Arsuz-İskenderun (Hatay) region and micro-size porosity changes in acidizing stages. The fine-grained sandstones of the Aktepe formation have more quartz grains than the other components and the binding material is matrix. Rock fragments that consist of fossil shells, limestone and igneous fragments are observed relatively to quartz and feldspar grains in the Kızıldere formation sandstones. The first step of reservoir rock acidizing is HCl acidizing and the process is experimentally provided by capilla

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21

Wurentuya, Bhnar, Wu Ren, and Bao Agula. "Lignocellulose Composition of Preparation of Porous Carbon Materials and CO<sub>2</sub> Adsorption Performance Research." Materials Science Forum 1125 (September 23, 2024): 71–83. http://dx.doi.org/10.4028/p-wprzp7.

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Porous carbon material adsorbents are one of the effective methods for carbon dioxide (CO2) capture and storage (CCS). In order to realize its application, it is urgent to find economical and efficient raw materials for preparing porous carbon materials. In this study, porous carbon materials were successfully prepared using lignocellulosic components as a carbon source and a mild Kac adsorbent. The CO2 adsorption performance of these materials was then tested. LCH-1 exhibited excellent CO2 adsorption performance and stability in all samples. The microporosity of LCH-1 is as high as 84.48%, an

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Bocuti, Edwaldo D., Ricardo S. S. Amorim, Luis A. Di L. Di Raimo, Wellington de A. Magalhães, and Emílio C. de Azevedo. "Effective hydraulic conductivity and its relationship with the other attributes of Cerrado soils." Revista Brasileira de Engenharia Agrícola e Ambiental 24, no. 6 (2020): 357–63. http://dx.doi.org/10.1590/1807-1929/agriambi.v24n6p357-363.

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ABSTRACT The objective of this study was to determine the effective hydraulic conductivity of six areas located in the Cerrado region of Mato Grosso, Brazil, and to identify physical attributes of soils with potential for predicting effective hydraulic conductivity. The tests to determine the effective hydraulic conductivity were carried out in six areas, covering the textural classes sand, sandy loam and clay, and the following uses: pasture, Cerrado and agriculture. Particle size, sand fractionation, total carbon content, degree of clay flocculation, bulk density, macroporosity, microporosit

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Solgi, Ahmad, Ramin Naghdi, Eric K. Zenner, Petros A. Tsioras, and Vahid Hemmati. "Effects of Ground-Based Skidding on Soil Physical Properties in Skid Trail Switchbacks." Croatian journal of forest engineering 40, no. 2 (2019): 341–50. http://dx.doi.org/10.5552/crojfe.2019.535.

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Effective skid-trail design requires a solid understanding of vehicle-soil interactions, yet virtually no data exist on the effects of harvest traffic on soils in the switchback curves common in mountainous terrain. We contrast for the first time the effect of skidding on dry bulk density, total porosity, macroporosity, and microporosity in the straight segments of the skid trail and in various positions within switchbacks of differing trail curvature (deflection angle) on different slope gradients. Treatment plots with three replications included combinations of two classes of curvature (narr

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Putri, ADIRA NA, RAHARDYAN Parnaadji, and ACHMAD Gunadi. "The effect of tobacco leave pastes (Nicotiana tabacum L.) 50% concentration as a denture cleanser on the surface roughness of thermoplastic nylon." World Journal of Advanced Research and Reviews 21, no. 2 (2024): 1199–205. https://doi.org/10.5281/zenodo.14019790.

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Microporosity of thermoplastic nylon can lead to increased surface roughness values. Surface roughness of thermoplastic nylon can facilitate colonization of microorganisms that can lead to denture stomatitis. The mechanical cleaning process of denture using an electric toothbrush and denture cleaning paste is considered effective for removing plaque and microorganisms attached. To reduce surface roughness, the use of natural materials such as tobacco leaves is considered beneficial because it can reduce the content of abrasive materials. This study aims to determine the effect of tobacco leaf

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Putri ADIRA NA, Parnaadji RAHARDYAN, and Gunadi ACHMAD. "The effect of tobacco leave pastes (Nicotiana tabacum L.) 50% concentration as a denture cleanser on the surface roughness of thermoplastic nylon." World Journal of Advanced Research and Reviews 21, no. 2 (2024): 1199–205. http://dx.doi.org/10.30574/wjarr.2024.21.2.0473.

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Microporosity of thermoplastic nylon can lead to increased surface roughness values. Surface roughness of thermoplastic nylon can facilitate colonization of microorganisms that can lead to denture stomatitis. The mechanical cleaning process of denture using an electric toothbrush and denture cleaning paste is considered effective for removing plaque and microorganisms attached. To reduce surface roughness, the use of natural materials such as tobacco leaves is considered beneficial because it can reduce the content of abrasive materials. This study aims to determine the effect of tobacco leaf

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Parise, John B., Xianyin Chen, Anna M. Plonka, et al. "XRD-DSC: a screening tool for identifying effective MOFs for selective gas sorption from humid gas streams." Powder Diffraction 34, no. 1 (2019): 3–12. http://dx.doi.org/10.1017/s088571561900006x.

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A commercially available combined X-ray diffraction – differential scanning calorimetry (XRD-DSC) stage was adapted for studies of gas loading in microporous materials, including metal organic frameworks (MOFs). Insertion of a custom-built humid atmosphere swing chamber (HASC) between a humidity generator and the XRD-DSC stage facilitates both humid atmosphere and vacuum swing gas loading. The HASC is necessary to buffer between the humidity generator and the XRD-DSC stage, allowing the gas mixture to homogenize prior to sample exposure, so that both humid atmosphere and vacuum swings could be

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Choi, Hye Min, Ye Ji Kim, E. Tae Choi, Tai Yong Lee, and Suk Joong Lee. "Use of porphyrin-containing polymers of intrinsic microporosity as selective photocatalysts for oxidative detoxification of chemical warfare agent simulant." Journal of Porphyrins and Phthalocyanines 26, no. 04 (2022): 340–47. http://dx.doi.org/10.1142/s1088424622500213.

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Porphyrin-based polymers of intrinsic microporosity (PIMs) in photocatalytic degradation of a mustard-gas simulant (2-chloroethyl ethyl sulfide (2-CEES)) was demonstrated. Under blue-ultraviolet (UV) light-emitting diode (LED) irradiation, porphyrin-based PIMs PP-H2 and PP-Zn(II) worked as effective heterogeneous photocatalysts for oxidation of 2-CEES. Solvent played an important role in the conversion and selectivity of 2-CEES oxidation. When AcCN was used as a solvent, PP-H2 and PP-Zn(II) demonstrated complete conversion of 2-CEES in 30 and 50 min, respectively, whereas they showed complete

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Kałahurska, Katarzyna, Pawel P. Ziemiański, Wieslaw J. Roth, and Barbara Gil. "From Colloidal Dispersions of Zeolite Monolayers to Effective Solid Catalysts in Transformations of Bulky Organic Molecules: Role of Freeze-Drying and Dialysis." Molecules 26, no. 7 (2021): 2076. http://dx.doi.org/10.3390/molecules26072076.

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We investigated the properties and catalytic activity of zeolites with MWW topology obtained by unprecedented liquid exfoliation of the MCM-56 zeolite into solutions of monolayers and isolation/reassembly of the dispersed layers by various methods, with optional purification by dialysis or ammonium exchange. The layers were recovered by flocculation with alcohol or ammonium nitrate and freeze-drying. Flocculation alone, even with ammonium nitrate, did not ensure removal of residual sodium cations resulting in catalysts with low activity. Dialysis of the solutions with dispersed monolayers prov

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Fisli, Adel, Saeful Yusuf, Ridwan, Yuni K. Krisnandi, and Jarnuzi Gunlazuardi. "Preparation and Characterization of Magnetite-Silica Nano-Composite as Adsorbents for Removal of Methylene Blue Dyes from Environmental Water Samples." Advanced Materials Research 896 (February 2014): 525–31. http://dx.doi.org/10.4028/www.scientific.net/amr.896.525.

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Magnetite-silica nanocomposites (Fe3O4/SiO2) have been synthesized and characterized and were used as an effective sorbent material for dyes removal from environmental water samples. They were prepared by a simple procedure via a co precipitation of iron (II) and iron (III) ion mixture in ammonium hydroxide and then was impregnated by a sodium silicate. The prepared samples were characterized using Zeta potential, XRD, VSM, TEM, EDS, and porosity analysis. The result of characterization showed that Fe3O4 nanoparticles have been coated by silica. The composite have been superparamagnetic behavi

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Caliskan, Esra, Sergey Shishatskiy, and Volkan Filiz. "Comparative Study of Polymer of Intrinsic Microporosity-Derivative Polymers in Pervaporation and Water Vapor Permeance Applications." Polymers 16, no. 20 (2024): 2932. http://dx.doi.org/10.3390/polym16202932.

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This study assesses the gas and water vapor permeance of PIM-derivative thin-film composite (TFC) membranes using pervaporation and “pressure increase” methods, and provides a comparative view of “time lag” measurements of thick films obtained from our previous work. In this study, TFC membranes were prepared using PIM-1 and homopolymers that were modified with different side groups to explore their effects on gas and water vapor transport. Rigid and bulky aliphatic groups were used to increase the polymer’s free volume and were evaluated for their impact on both gas and water transport. Aroma

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Alansari, Abubaker, Ahmed Mohamad Ahmed Salim, Hammad Tariq Janjuhah, Abdul Hadi Bin Abd Rahman, and Nuri Mohamed Fello. "Quantification of clay mineral microporosity and its application to water saturation and effective porosity estimation: A case study from Upper Ordovician reservoir, Libya." Journal of Natural Gas Geoscience 4, no. 3 (2019): 139–50. http://dx.doi.org/10.1016/j.jnggs.2019.04.005.

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Ling, Honglei, Omid T. Qazvini, Shane G. Telfer, and Jianyong Jin. "Effective enhancement of selectivities and capacities for CO 2 over CH 4 and N 2 of polymers of intrinsic microporosity via postsynthesis metalation." Journal of Polymer Science 58, no. 18 (2020): 2619–24. http://dx.doi.org/10.1002/pol.20200104.

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Ortega-Franqueza, María, Svetlana Ivanova, María Isabel Domínguez, and Miguel Ángel Centeno. "Mesoporous Carbon Production by Nanocasting Technique Using Boehmite as a Template." Catalysts 11, no. 9 (2021): 1132. http://dx.doi.org/10.3390/catal11091132.

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A series of mesoporous carbonaceous materials were synthesized by the nanocasting technique using boehmite as a template and glucose as a carbon precursor. After pyrolysis and template removal, the resulting material is a mesoporous carbon that can be additionally doped with N, B and K during prepyrolysis impregnation. In addition, the influence of doping on the morphology, crystallinity and stability of the synthesized carbons was studied using X-ray diffraction, nitrogen physisorption, thermogravimetry, Raman and IR spectroscopy and transmission electron microscopy. While the nanocasting pro

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Joshi, Sahira, and Bishnu K.C. "Synthesis and Characterization of Sugarcane Bagasse Based Activated Carbon: Effect of Impregnation Ratio of ZnCl2." Journal of Nepal Chemical Society 41, no. 1 (2020): 74–79. http://dx.doi.org/10.3126/jncs.v41i1.30490.

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Series of activated carbons (ACs) have been prepared from Sugarcane bagasse powder by ZnCl2 activation at various impregnation ratios of ZnCl2 to Sugarcane bagasse powder of 0.25:1, 0.5:1, 1:1 and 2:1 by weight. Characteristics of the activated carbons (ACs) were determined by iodine number, methylene blue number, surface area, scanning electron microscopy (SEM) and x-ray diffraction. Iodine number (IN) indicated that, microporosity of the AC were increased with increasing impregnation ratio ZnCl2 to Sugarcane bagasse upto 1:1 then started to decrease. However, mesoporosity as well as surface

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Baillie, Peter W., Peter R. Tingate, and William J. Stuart. "RESERVOIR DEVELOPMENT AND DIAGENESIS IN THE BASS BASIN, TASMANIA." APPEA Journal 31, no. 1 (1991): 85. http://dx.doi.org/10.1071/aj90008.

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Drilling and testing in the Bass Basin during 1985-86 indicated that reservoir quality of the lower Eastern View Group is one of the major factors determining the prospectivity of the basin. This study utilises an integrated sedimentological analysis to determine depositional environments of the various reservoirs, and documents the nature and effects that subsequent diagenesis has had on those reservoirs.During the Paleocene, deposition of the lower Eastern View Group took place within a progradational delta complex in a restricted marine environment. Sandstone bodies deposited in high-energy

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Sørensen, Morten Kanne, and Ida Lykke Fabricius. "Clay squirt: Local flow dispersion in shale-bearing sandstones." GEOPHYSICS 82, no. 1 (2017): MR51—MR63. http://dx.doi.org/10.1190/geo2015-0036.1.

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Dispersion of elastic-wave velocity is common in sandstone and larger in shaly sandstone than in clean sandstone. Dispersion in fluid-saturated shaly sandstone often exceeds the level expected from the stress-dependent elastic moduli of dry sandstone. The large dispersion has been coined clay squirt and is proposed to originate from a pressure gradient between the clay microporosity and the effective porosity. We have formulated a simple model that quantifies the clay-squirt effect on bulk moduli of sandstone with homogeneously distributed shale laminae or dispersed shale. The model prediction

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Guastaferro, Mariangela, Lucia Baldino, Stefano Cardea, and Ernesto Reverchon. "Different Drying Techniques Can Affect the Adsorption Properties of Agarose-Based Gels for Crystal Violet Removal." Applied Sciences 13, no. 1 (2022): 463. http://dx.doi.org/10.3390/app13010463.

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Agarose-based gels were produced either by freeze-drying or by supercritical drying for crystal violet (CV) removal from aqueous solutions. The microporosity features of these structures highly affected the final adsorption properties. In particular, agarose cryogels were characterized by a macroporous and irregular morphology, with a low value of specific surface area (11 ± 6 m2/g) with respect to the nanoporous agarose aerogels (154 ± 12 m2/g). To test the efficacy of CV removal, two different types of adsorption test were performed, i.e., batch-mode and multi-step mode. Operating in the mul

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Chen, Yang, Rong Xian, Jiawei Wang, Zhangli Hu, and Wenbin Wang. "Synergetic Effect of Superabsorbent Polymer and CaO-Based Expansive Agent on Mitigating Autogenous Shrinkage of UHPC Matrix." Materials 16, no. 7 (2023): 2814. http://dx.doi.org/10.3390/ma16072814.

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The hybrid use of a superabsorbent polymer (SAP) and expansive agent (EA) is beneficial for mitigating the autogenous shrinkage of ultra-high-performance concrete (UHPC) without compromising strength. However, the unclear mechanisms behind the synergetic effect of the two materials may hinder the more effective applications of this method. This study clarifies the interactions between SAP and CaO-based EA (CEA) in a UHPC matrix by quantifying the content and distribution of water and hydration products, underlining their influence on the strength and autogenous shrinkage evolution. The high st

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Al-Hetlani, Entesar, Mohamed O. Amin, C. Grazia Bezzu, and Mariolino Carta. "Spirobifluorene-based polymers of intrinsic microporosity for the adsorption of methylene blue from wastewater: effect of surfactants." Royal Society Open Science 7, no. 9 (2020): 200741. http://dx.doi.org/10.1098/rsos.200741.

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Owing to their high surface area and superior adsorption properties, spirobifluorene polymers of intrinsic microporosity (PIMs), namely PIM-SBF-Me (methyl) and PIM-SBF-tBu ( tert -butyl), were used for the first time, to our knowledge, for the removal of methylene blue (MB) dye from wastewater. Spirobifluorene PIMs are known to have large surface area (can be up to 1100 m 2 g −1 ) and have been previously used mainly for gas storage applications. Dispersion of the polymers in aqueous solution was challenging owing to their extreme hydrophobic nature leading to poor adsorption efficiency of MB.

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Saenger, Erik H., Stephanie Vialle, Maxim Lebedev, et al. "Digital carbonate rock physics." Solid Earth 7, no. 4 (2016): 1185–97. http://dx.doi.org/10.5194/se-7-1185-2016.

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Abstract. Modern estimation of rock properties combines imaging with advanced numerical simulations, an approach known as digital rock physics (DRP). In this paper we suggest a specific segmentation procedure of X-ray micro-computed tomography data with two different resolutions in the µm range for two sets of carbonate rock samples. These carbonates were already characterized in detail in a previous laboratory study which we complement with nanoindentation experiments (for local elastic properties). In a first step a non-local mean filter is applied to the raw image data. We then apply differ

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Klenam, Desmond Edem Primus, Gabriel Seun Ogunwande, Taiwo Omotosho, et al. "Welding of magnesium and its alloys: an overview of methods and process parameters and their effects on mechanical behaviour and structural integrity of the welds." Manufacturing Review 8 (2021): 29. http://dx.doi.org/10.1051/mfreview/2021028.

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An overview of welding methods and process parameters and its effects on mechanical behaviour and structural integrity of magnesium and its alloys are discussed. These alloys are less dense and beneficial structural alloys for improved energy efficiency, eco-friendliness and driver of circular economic model for sustainable design and innovative ecosystem. While the application of Mg-alloys is projected to increase, understanding the mechanical behaviour and structural integrity of welded joints are critical. Thus, fusion and solid-state welding processes of these alloys are discussed with emp

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Shahin, Alireza, Michael T. Myers, and Lori A. Hathon. "Borehole Geophysical Joint Inversion to Fully Evaluate Shaly Sandstone Formations." Applied Sciences 12, no. 3 (2022): 1255. http://dx.doi.org/10.3390/app12031255.

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Simultaneous inversion of sonic, density, and electrical resistivity borehole-derived well logs, has been addressed in literature in recent years. However, this problem is not broadly studied for dual-porosity sandstone formations. In addition, most authors presumed salinity and matrix properties as known parameters in their studies. We integrate the conservation of mass to model density, a differential effective medium theory for elastic modeling, and a laboratory-supported model for electrical resistivity of dual-porosity sandstones. Utilizing this methodology, we simulate electrical resisti

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Park, Kwang Hyun, Byung Gon Kim, and Sung Ho Song. "Synergistic Effect of a Defect-Free Graphene Nanostructure as an Anode Material for Lithium Ion Batteries." Nanomaterials 10, no. 1 (2019): 9. http://dx.doi.org/10.3390/nano10010009.

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Graphene nanosheets have been among the most promising candidates for a high-performance anode material to replace graphite in lithium ion batteries (LIBs). Studies in this area have mainly focused on nanostructured electrodes synthesized by graphene oxide (GO) or reduced graphene oxide (rGO) and surface modifications by a chemical treatment. Herein, we propose a cost-effective and reliable route for generating a defect-free, nanoporous graphene nanostructure (df-GNS) through the sequential insertion of pyridine into a potassium graphite intercalation compound (K-GIC). The as-prepared df-GNS p

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Piotrowska, Aleksandra, Krzysztof Kierzek, and Jacek Machnikowski. "Effect of PAN Oxidation on the Electrochemical Lithium Insertion/Deinsertion Behavior of Resultant Carbons." Journal of Chemistry 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/370906.

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The effect of polyacrylonitrile (PAN) oxidation on the properties and electrochemical lithium insertion/deinsertion behavior of carbons produced in the temperature range of 1000–1150°C has been assessed. Air-treatment at 220 and 240°C modifies essentially the carbonization behavior of polymer leading to materials with developed microporosity and enhanced oxygen content in contrast to practically nonporous pristine PAN-based carbon. The extent of the modification increases with the oxidation depth and decreases with HTT. Galvanostatic charge/discharge reveals typical hard carbons characteristic

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Márquez Negro, Alejandro, Verónica Martí, José María Sánchez-Hervás, and Isabel Ortiz. "Development of Pistachio Shell-Based Bioadsorbents Through Pyrolysis for CO2 Capture and H2S Removal." Molecules 30, no. 7 (2025): 1501. https://doi.org/10.3390/molecules30071501.

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The development of sustainable waste management for environmental remediation has highlighted the potential of biochar produced from agricultural wastes as an effective adsorbent for gas pollutant capture. This work focuses on the production and activation of biochar derived from pistachio shells for CO2 and H2S adsorption. Adsorbents were obtained by pyrolysis and subsequently activated through two methods: chemical activation with KOH and physical activation with CO2. Adsorption studies were conducted to evaluate the influence of these activation methods on textural properties and adsorption

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Kwon, Ki-Seok, and Han-Seung Lee. "Sustainable Development of Sawdust Biochar as a Green and Promising Material for CO2 Capture Technologies." Materials 18, no. 14 (2025): 3243. https://doi.org/10.3390/ma18143243.

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This study investigates the synthesis of highly porous ZnCl2-activated biochars derived from sawdust through controlled pyrolysis at 300 °C and 500 °C, aiming to enhance CO2 adsorption performance. The effects of pyrolysis temperature and chemical activation on particle size distribution, surface area, and pore structure are systematically analyzed. Particle size analysis reveals that higher pyrolysis temperature and ZnCl2 activation significantly reduce both median and mean particle sizes, resulting in finer and more uniform biochar morphology. BET analysis demonstrates a substantial increase

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Hazaveie, Seyed M., Babak Aminshahidy, and Mohammad Nikbin. "A Review of the Intrinsic Parameters Affecting the Elastic Characteristics of Heterogeneous Carbonate Reservoirs: Insights from Laboratory Assessments." International Journal of Petroleum Technology 11 (December 18, 2024): 40–55. https://doi.org/10.15377/2409-787x.2024.11.4.

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This research provides an in-depth analysis of how various parameters such as mineralogy, density, porosity, temperature, pressure, and structural features impact the velocities of sonic waves in carbonate rocks. Our findings reveal that the mineral composition significantly influences the elastic behavior of these rocks. The density and elastic properties of minerals, especially clay minerals, play a crucial role in affecting porosity and predominant pore types. The porosity of carbonate reservoirs impacts their elastic properties, leading to variations in sonic wave velocities depending on t

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Araújo Pedron, Fabrício de, Jessé Rodrigo Fink, Miriam Fernanda Rodrigues, and Antonio Carlos de Azevedo. "Hydraulic conductivity and water retention in leptosols-regosols and saprolite derived from sandstone, Brazil." Revista Brasileira de Ciência do Solo 35, no. 4 (2011): 1253–62. http://dx.doi.org/10.1590/s0100-06832011000400018.

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Leptosols and Regosols are soils with a series of restrictions for use, mainly related to the effective depth, which have been poorly studied in Brazil. These soils, when derived from sedimentary rocks should be treated with particular care to avoid environmental damage such as aquifer contamination. The purpose of this study was to verify the behavior of hydraulic conductivity and water retention capacity in profiles of Leptosols and Regosols derived from sandstone of the Caturrita formation in Rio Grande do Sul state. The morphology, particle size distribution, porosity, soil density (Ds), s

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Pavičić, Ivica, Zlatko Briševac, Anja Vrbaški, et al. "Geometric and Fractal Characterization of Pore Systems in the Upper Triassic Dolomites Based on Image Processing Techniques (Example from Žumberak Mts, NW Croatia)." Sustainability 13, no. 14 (2021): 7668. http://dx.doi.org/10.3390/su13147668.

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Karst aquifers are important sources of thermal and groundwater in many parts of the world, such as the Alpine–Dinaric–Carpathian region in Europe. The Upper Triassic dolomites are regionally recognized thermal and groundwater aquifers but also hydrocarbon reservoirs. They are characterized by predominantly fractured porosity, but the actual share of depositional and diagenetic porosity is rarely investigated. In this research, we presented the geometric characterization of the measured microporosity of the Upper Triassic dolomites of the Žumberak Mts (Croatia), through thin-section image proc

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Wang, Lina, Mariolino Carta, Richard Malpass-Evans, et al. "Hydrogen Peroxide Versus Hydrogen Generation at Bipolar Pd/Au Nano-catalysts Grown into an Intrinsically Microporous Polyamine (PIM-EA-TB)." Electrocatalysis 12, no. 6 (2021): 771–84. http://dx.doi.org/10.1007/s12678-021-00692-5.

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AbstractBinding of PdCl42− into the polymer of intrinsic microporosity PIM-EA-TB (on a Nylon mesh substrate) followed by borohydride reduction leads to uncapped Pd(0) nano-catalysts with typically 3.2 ± 0.2 nm diameter embedded within the microporous polymer host structure. Spontaneous reaction of Pd(0) with formic acid and oxygen is shown to result in the competing formation of (i) hydrogen peroxide (at low formic acid concentration in air; with optimum H2O2 yield at 2 mM HCOOH), (ii) water, or (iii) hydrogen (at higher formic acid concentration or under argon). Next, a spontaneous electroles

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