Adsorption最新文献

{"title":"Ni-Pt bimetallic adsorbent for deep desulphurization of coked benzene","authors":"Jianzheng Jiang,&nbsp;Yunrui Li,&nbsp;Hui Tian,&nbsp;Haisheng Wei,&nbsp;Yao Wang,&nbsp;Xiaoping Chen,&nbsp;Xu Fang","doi":"10.1007/s10450-025-00624-5","DOIUrl":"10.1007/s10450-025-00624-5","url":null,"abstract":"<div><p>In the field of chemical engineering, achieving deep thiophene removal from coked benzene is a formidable challenge. This, coupled with the limitation of low sulfur capacity, has been major obstacle to the large-scale application of adsorption desulphurisation technology. In this study, Ni-Pt/Al₂O₃-CA adsorbent was prepared. The citric acid treated γ-Al₂O₃ was used as the carrier, and Ni-Pt bimetal as the active component. The relationship between the microstructure and adsorption performance of the adsorbent was investigated by BET, XRD, SEM, TEM, TPR, XPS and Py-FTIR. The results showed that the Ni-Pt/Al₂O₃-CA adsorbent could not only reduce the thiophene content in benzene to less than 10 ppb but also had sulfur capacity of 2.73 mg S/g compared with the monometallic adsorbent. The adsorption performance of the Ni-Pt/Al₂O₃-CA adsorbent was restored to 95% of the initial one after three repetitive experiments. Meanwhile, based on the kinetic modelling results, the quasi-secondary kinetic model fitted the adsorption data of thiophene on Ni-Pt/Al₂O₃-CA adsorbent better. And the process of thiophene adsorption was described in depth in the diffusion model.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 4","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A perspective on characterization of porous materials: the melting line and triple point","authors":"Rong An,&nbsp;Renxi Le,&nbsp;Keith E. Gubbins,&nbsp;Malgorzata Śliwinska-Bartkowiak,&nbsp;Matthias Thommes","doi":"10.1007/s10450-025-00617-4","DOIUrl":"10.1007/s10450-025-00617-4","url":null,"abstract":"<div><p>The most commonly used methods of characterization of mesoporous materials involve measurement of the adsorption isotherm for a simple gas at some low fixed temperature, usually the normal boiling point. Observation of the condensation pressure in the pores makes it possible to estimate the pore size distribution and the surface area. In this note we review experimental and molecular simulation results for the pressure-temperature phase diagram for adsorbates confined within nano-porous materials, and point out that both the triple point and the pressure-dependence of the melting line are strikingly different from these properties for the bulk adsorbate. We suggest that further investigation of these two properties, and of their underlying interpretation at the molecular-level, are worthy of further study, with a view to improved characterization of nano-porous materials.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 4","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10450-025-00617-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovative pectin-based composite membranes: preparation, characterization and color pollutant separation from water","authors":"Ana Maria Tischer,&nbsp;Rafaela Reis Ferreira,&nbsp;Ionara de Fátima Ferreira,&nbsp;Derval dos Santos Rosa,&nbsp;Alexandre Tadeu Paulino","doi":"10.1007/s10450-025-00619-2","DOIUrl":"10.1007/s10450-025-00619-2","url":null,"abstract":"<div><p>The aim of the present study was to synthesise and characterise innovative pectin/pine sawdust/magnetite composite membranes as potential sorbents for the purification of water contaminated with color pollutants. Methylene blue (MB) was employed as the pollutant model for sorption. Fourier-transform infrared spectroscopy (FTIR) was performed to analyse the formation of crosslinked membrane chains and confirm the sorption processes of the dye molecules. Thermogravimetry (TGA) and derivative thermogravimetry (DTG) indicated that the polymer matrix is stable at low temperatures and begins to degrade at temperatures above 250 °C, whereas X-Ray diffraction (XRD) patterns confirmed crystalline and amorphous regions. Mechanical assays confirmed an increase in the modulus of elasticity and tensile strength of the biopolymer membranes after incorporating PS. Moreover, a reduction in mechanical deformation was found after the incorporation of Fe₃O₄. Pollutant separation experiments were performed in a pH range from 3.0 to 10.0 with initial pollutant concentrations of 5 to 25 mg L⁻¹ and separation times from 1 to 3050 min. Higher sorption capacity was found after 1800 min with an initial pollutant concentration of 20 mg L⁻¹ and pH 10.0. The best isotherm fit was found using the Redlich-Peterson model, with fits using the Langmuir model depending on the experimental conditions. The best kinetic fit was found using the pseudo-first-order or pseudo-second-order models at pH 3.0, with differences in more alkaline solutions. The pectin-based composite membranes proved to be viable options for the purification of wastewater from industry using dye and could also be tested for the photodegradation of organic pollutants in water due to the presence of Fe₃O₄.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 4","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring boron nitride’s potential in adsorbing light mercaptans for fuel desulfurization","authors":"Abbas Aleghafouri,&nbsp;Shohreh Fatemi,&nbsp;Ali Mohajeri","doi":"10.1007/s10450-025-00620-9","DOIUrl":"10.1007/s10450-025-00620-9","url":null,"abstract":"<div><p>This study addresses the challenges of desulfurizing natural gas condensate through selective adsorption using hexagonal boron nitride (h-BN) material. h-BN was synthesized from thermal process of boric acid and mixture of urea and melamine with high specific surface area to be examined for light mercaptans removal from liquid fuel. characterization of synthesized adsorbent was done using X-ray diffraction, Fourier-transform infrared spectroscopy, field emission scanning electron microscopy (FESEM), elemental analysis (CHN and ICP), and nitrogen adsorption/desorption analysis. Our findings confirmed synthesizing h-BN with high specific surface area of 1263 m²/g and hydroxyl group. This product was used as the adsorbent of ethyl, propyl and butyl mercaptans from the solution of n-heptane as the model molecule of the gas condensate liquid to obtain the equilibrium isotherms’ and kinetic adsorption data. It was revealed that the adsorption capacities were determined as 89.29 mg S/g for ethyl mercaptan, 103.66 mg S/g for propyl mercaptan, and 120.91 mg S/g for butyl mercaptan, significantly surpassing the commercial zeolite 13X adsorbent by 233% at room temperature. Kinetic experiments revealed that the pseudo-second-order model could best describe the rate of mercaptans’ adsorption. Notably, the synthesized h-BN was easily regenerated through the thermal treatment at moderate temperature of 150 °C, highlighting its potential for cyclic adsorption processes of desulfurization.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 4","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Slit-like pores are not always 1D: analysis of CH(_4) adsorption on clay minerals from 3D-cDFT and GCMC","authors":"Lucas J. dos Santos,&nbsp;Elvis do A. Soares,&nbsp;Amaro G. Barreto Jr.,&nbsp;Frederico W. Tavares","doi":"10.1007/s10450-025-00621-8","DOIUrl":"10.1007/s10450-025-00621-8","url":null,"abstract":"<div><p>Nanoporous materials are frequently characterized as simple geometries such as slit-like, cylindrical, or spherical pores. However, these approximations cannot account for the surface roughness and chemical heterogeneity inherent to clay minerals. Here, we present a comprehensive computational examination of methane (CH<span>(_4)</span>) adsorption in nanoporous clay minerals, applying three complementary approaches-three-dimensional classical Density Functional Theory (3D-cDFT), one-dimensional (1D) cDFT, and Grand Canonical Monte Carlo (GCMC) simulations-to elucidate the roles of fluid-solid interactions and fluid-fluid correlations under confinement. We show that 3D-cDFT accurately captures high-pressure adsorption phenomena in illite and provides a powerful framework for reconstructing pore size distributions from experimental data, thereby enabling a more nuanced characterization of heterogeneous nanoporous materials.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 4","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel structured graphene oxide@microalgae nanohybrids as adsorbents for removal of Cr(VI) ions in aqueous solutions","authors":"Rolivhuwa Mulovhedzi,&nbsp;Kholiswa Yokwana,&nbsp;Timothy O. Ajiboye,&nbsp;Adeniyi S. Ogunlaja,&nbsp;Sabelo D. Mhlanga","doi":"10.1007/s10450-025-00614-7","DOIUrl":"10.1007/s10450-025-00614-7","url":null,"abstract":"<div><p>Novel structured graphene oxide@microalgae-based nanohybrids have been prepared by incorporating green microalgae biomass (Algae) with graphene oxide (GO) or N-doped graphene oxide (NGO) in different ratios (e.g., 3:1, 1:1 and 1:3). Biogenic GO-Algae and NGO-Algae nanohybrids were synthesized <i>via</i> a self-assembly method. Morphological and structural characterizations and adsorption performance of the nanostructured material towards Cr(VI) species were studied extensively. The removal of Cr(VI) species by GO-Algae and NGO-Algae nanohybrids was highly pH dependent, with the maximum adsorption removal occurring at pH 2. The results indicate that the adsorption of Cr(VI) by GO-Algae and NGO-Algae nanohybrids was as follows: GO@Algae-3:1 (90.5%) &lt; GO@Algae-1:1 (98.7%) &lt; GO@Algae-1:3 (99.6%) and NGO@Algae-3:1 (79.2%) &lt; NGO@Algae-1:1 (82.3%) &lt; NGO@Algae-1:3 (92.6%), respectively. The GO: Algae-1:3 and NGO: Algae-1:3 nanohybrids with a high microalgae content ratio exhibited high maximum removal, owing to the presence of more active sites within their lattice compared to their counterparts. On the other hand, pseudo-first-order, pseudo-second-order, intraparticle diffusion, Langmuir, and Freundlich models adequately simulated adsorption mechanisms, suggesting that the adsorption process involved a combination of external mass transfer and chemisorption, with electrostatic and complexation interactions being the dominant mechanisms for Cr(VI) removal. Additionally, GO@Algae-1:3 and NGO@Algae-1:3 displayed outstanding reusability. Therefore, these structured graphene@microalgae-based nanohybrids can simultaneously serve as adsorbents for Cr(VI) removal from wastewater and contaminated water sources.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 4","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10450-025-00614-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review on process intensification for adsorptive wastewater treatment: focus on bed geometries","authors":"S. Balasubramanian,&nbsp;Ashish Kapoor,&nbsp;E. Nakkeran,&nbsp;K. Murugasen,&nbsp;R. NaveenKumar,&nbsp;S. B. Harini,&nbsp;D. Venkatesan,&nbsp;M. Laxmi Deepak Bhatlu","doi":"10.1007/s10450-025-00622-7","DOIUrl":"10.1007/s10450-025-00622-7","url":null,"abstract":"<div><p>Treating wastewater contaminated with toxic pollutants is becoming increasingly challenging for chemical processes and allied industries due to stringent environmental legislation and the focus on sustainability. Conventional wastewater treatment processes involve multiple stages with many unit operations and processes. To meet the growing technical, economical, and environmental sustainability needs, industries are interested in innovative processes and technologies offering compact, small-sized equipment with improved mass transport, heat, and momentum and reduced capital and operating expenses. The Process Intensification (PI) approach is gaining importance in wastewater treatment as it offers these advantages. Among the various separation methods involved in wastewater treatment, adsorption is considered to be one of the most robust methods in the series of treatments for removing low concentrations of contaminants. The design of adsorption columns with alternate bed geometries is desirable to meet the requirements of less installation cost, small footprint area, and compact adsorption columns without compromising performance. However, there is limited literature are available related to bed geometries (helical and tapered) other than the vertical fixed type. Therefore, a systematic literature review was performed with an interest in adsorption bed configuration and separation performance. Key technical aspects are explored, including the influence of bed geometry, adsorbent stratification (normal and reverse), and flow dynamics on mass transfer kinetics. Computational Fluid Dynamics (CFD) modeling employs governing equations such as the Advection-Dispersion Equation and Darcy’s Law, which aids in optimizing column performance. The incorporation of adsorption isotherms, such as Langmuir and Freundlich models, provides a deeper understanding of pollutant-adsorbent interactions. The study also evaluates economic aspects, comparing CAPEX and OPEX across configurations. Fixed beds feature low initial costs but face challenges like clogging and pressure drops. Tapered beds, while more expensive to fabricate, achieve efficient flow distribution and reduced adsorbent usage. With their intricate design, Helical coil columns demand higher manufacturing and operational investments but excel in compactness and efficiency. The review can help the researchers to leverage the potential of process intensification to enhance the adsorption column design and advance in wastewater treatment.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 4","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revisit the molecular sieving mechanism in LTA zeolites: does size really matter?","authors":"Mingzhe Sun,&nbsp;Aamir Hanif,&nbsp;Tianqi Wang,&nbsp;Zeyu Tao,&nbsp;Daisong Chen,&nbsp;Gang Li,&nbsp;Zhe Liu,&nbsp;Qinfen Gu,&nbsp;Paul A. Webley,&nbsp;Jin Shang","doi":"10.1007/s10450-025-00616-5","DOIUrl":"10.1007/s10450-025-00616-5","url":null,"abstract":"<div><p>“Molecular sieving”-based separation of similar-sized gases (e.g., CO₂, N₂, and CH₄) is both desirable and challenging due to the difficulty of obtaining adsorbents with pore sizes that permit exclusive admission. The “molecular trapdoor effect” offers a promising solution, focusing on the difference in gases’ ability to dynamically open a “door” via interaction with the “door-keeper” in adsorbents, rather than relying on size-sieving. In this study, we studied Na and K-exchanged zeolites with Si/Al ratios ranging from 1 to 2.2 and demonstrate that potassium form zeolite LTA with a Si/Al ratio of 2.2 (referred to as r2KLTA) exhibits the molecular trapdoor mechanism, as evidenced by CO₂/N₂ separation, gas adsorption, and in situ powder X-ray diffraction experiments. The K⁺ ion, acting as the door-keeper, is situated at the eight-membered ring (8MR) pore aperture of LTA, enabling the exclusive separation. Notably, this separation mechanism diverges from the traditional static sieving model and suggests that gas molecule admission is regulated by dynamic door-opening. In contrast to previous reports showing negligible CO₂ adsorption in r1KLTA (3 A zeolite), our findings reveal a significant CO₂ uptake, which points to the trapdoor mechanism as the key factor. This study offers new insights into the classical zeolite molecular sieve (3 A) for gas separation, where gas selectivity is governed by dynamic door-opening rather than static interactions. The demonstrated molecular trapdoor effect in r2LTA zeolites opens new possibilities for designing adsorbents with high selectivity and enhanced kinetics at optimal temperatures.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production and kinetic studies of composite sorbents based on methacrylic acid for the removal of aqueous uranyl ions","authors":"Navid Allahyar,&nbsp;Sibel Yazar,&nbsp;Ayse E. Kurtoglu,&nbsp;Cemal Ozeroglu","doi":"10.1007/s10450-025-00613-8","DOIUrl":"10.1007/s10450-025-00613-8","url":null,"abstract":"<div><p>Uranyl ions (UO₂²⁺) are the form of uranium usually dissolved in water and are radioactive and can cause serious damage to the environment. Adsorption of uranyl ions is a critical method for removing and safely storing radioactive materials that harm the environment. It is also an important tool for combating water and soil contamination, managing nuclear waste and environmental sustainability. Polymer-based composites were developed for this purpose. Polymer-based composites enable the efficient removal of harmful and radioactive uranium compounds from water and soil. Through the incorporation of polymers and fillers (such as zeolite), materials with specific properties capable of adsorbing uranyl ions with high efficiency can be designed. The ratio of the components constituting the composites can be adjusted to optimize the adsorption capacity, as well as the chemical and thermal behaviors. Two composites were created: P(MA-Z50), consisting of ethylene glycol dimethacrylate (EGDM), methacrylic acid (MA), and zeolite, and P(MA-Z75), which contained a higher amount of zeolite. These composites were synthesized at room temperature and analyzed using various techniques such as Fourier transform infrared (FTIR), thermal gravimetric analysis (TGA), and scanning electron microscopy (SEM). The study investigated the effects of adsorbent quantity, adsorbate concentration, temperature, time, and pH on adsorption efficiency and capacity. The Langmuir adsorption isotherm provided the best fit for uranium (VI) adsorption. The results showed that rapid adsorption occurred within the first 100 min, with the rate slowing down until equilibrium was reached after 360 min. The pseudo-second-order kinetic model best described the adsorption process.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10450-025-00613-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile characterization of pore accessibility in metal-organic framework/polymer composites","authors":"Trenton M. Tovar,&nbsp;Gregory W. Peterson","doi":"10.1007/s10450-025-00618-3","DOIUrl":"10.1007/s10450-025-00618-3","url":null,"abstract":"<div><p>Metal-organic framework (MOF)/polymer composites provide the possibility of combining the desired reactive and sorptive properties of highly porous MOFs with the desired mechanical properties of polymers to develop novel functional materials. Both MOF and polymer chemistries are complex leading to various degrees of material compatibility. It is desired to develop a facile measurement of the accessibility of MOF pore space within the composite matrix. Traditionally, N₂ isotherms at 77 K have been used to characterize pore space in porous materials. We found that using N₂ isotherms to assess pore accessibility in MOF/polymer composites underestimates the true accessibility at operational conditions. This is mostly due to the cryogenic temperature of the measurement being below the glass transition temperature of polymers. However, composite synthesis and morphology also play a role in the measurement. Measuring CO₂ isotherms at 0 °C was shown to be a facile, more accurate measurement of pore accessibility in MOF/polymer composites.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}