Adsorption

Xem 1-20 trên 90 kết quả Adsorption
  • Adsorption occurs whenever a solid surface is exposed to a gas or liquid: it is defined as the enrichment of material or increase in the density of the fluid in the vicinity of an interface. Under certain conditions, there is an appreciable enhancement in the concentration of a particular component and the overall effect is then dependent on the extent of the interfacial area. For this reason, all industrial adsorbents have large specific surface areas (generally well in excess of 100mZg-I) and are therefore highly porous or composed of very fine particles...

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  • The significant research in adsorption in the 70s through the 90s could be attributed to the discovery of many new porous materials, such as carbon molecular sieve, and the invention of many new clever processes, notably Pressure Swing Adsorption (PSA) processes. This evolution in adsorption research is reflected in many books on adsorption, such as the ones by Ruthven (1984), Yang (1987, 1997), Jaroniec and Madey (1988), Suzuki (1990), Karger and Ruthven (1992) and Rudzinski and Everett (1992).

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  • This book is intended to present for the first time experimental methods to measure equilibria states of pure and mixed gases being adsorbed on the surface of solid materials. It has been written for engineers and scientists from industry and academia who are interested in adsorption based gas separation processes and/or in using gas adsorption for characterization of the porosity of solid materials

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  • Although pressure swing adsorption (PSA) is not a new process, it is really only during the past decade that such processes have achieved widespread commercial acceptance as the technology of choice for more than a few rather specific applications.

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  • The adsorption of γ-FeOOH for As (V) and As(III) could be competed by some other ion such as sulfate, ammonium and chloride. The high adsorption capability and good performance on other aspects make the γ-FeOOH nanorod a promissing adsorbent for the removal of As (V) and As(III) from the groundwater.

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  • Isotherms, thermodynamics and kinetics of rhodamine B dye adsorption on natural diatomite. In this paper, Phu Yen diatomite was used as adsorbent for adsorption rhodamine B (RB) dye in aqueous solution. Analysis methods, including SEM, XRD, FT -IR, and N2 adsorption-desorption isotherms, were used to characterise the adsorbent.

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  • This book presents some apparent divergences, that is, its content branches off in many directions. This fact is reflected in the titles of the chapters and the methods applied in discussing the problems of physical adsorption. It is not accidental. I aimed to prove that the problems of physical adsorption, in spite of the ramified research fields, have similar or identical roots. These statements mean that this book is 1) diverse, but still unified and 2) classical, but still modern. The book contains monographs at a scientific level and some chapters include parts that can be used by Ph.

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  • The result shows that phenyl groups containing nitrogen (e.g. pyrazine, pyridine) and carboxyl group are able to increase the interaction energy between gas and mof, thereby increasing the gas adsorption capacity. In addition, transition metals can significantly enhance the CO2/CH4 selectivity.

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  • At the study pH, for arsen, the adsorption equilibrium was gained after 90 min. Kinetic data fitted well to the pseudo-secondorder reaction model. The adsorption of γ- FeOOH for As (V) and As(III) could be competed by some other ion such as sulfate, ammonium and chloride. The high adsorption capability and good performance on other aspects make the γ- FeOOH nanorod a promissing adsorbent for the removal of As (V) and As(III) from the groundwater.

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  • Abstract Use of red mud, which is a waste product from bauxite processing, has been explored as an alternate adsorbent for arsenic in this study. The tests showed that the alkaline aqueous medium (pH 9.5) favored the removal of As(III), whereas the pH range from 1.1 to 3.2 was e€ective for As(V) removal. The process of arsenic adsorption follows a ®rst-order rate expression and obeys the Langmuir's model. It was found that the adsorption of As(III) was exothermic, whereas As(V) adsorption was endothermic. ...

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  • Since the invention of synthetic zeolites in 1959, innovations in sorbent development and adsorption process cycles have made adsorption a key separations tool in the chemical, petrochemical and pharmaceutical industries. In all future energy and environmental technologies, adsorption will likely play either a key or a limiting role. Some examples are hydrogen storage and CO removal (from hydrogen, to

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  • When asked about the most important technology for the Process Industries, most people might offer 'reaction'. If one considers where value is really added, it is more probably in the separation and purification of the products. It is therefore a great pleasure to find that Professors Crittenden and Thomas have made a major contribution to this with their new book. My career has been spent in the Industrial Gases industry where cost-effectiveness of separation processes is the main way of creating competitive advantage....

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  • Waste generated for the during the red mud, an industrial ore, aqueous the byproduct, is recycled solution. such processing of were congo of bauxite red from adsorption kinetics Adsorption studied using dose, parameters time as dye concentration, Adsorption adsorption isotherms. dye was followed data The 4.05 adsorbent first rate both agitation The and red to and pH.

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  • The book "Developments in Electrochemistry" contains five feature articles in recent advanced electrochemistry. These selected feature articles emphasize physical phenomena rather than mathematical formalisms of electrochemistry.

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  • Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Preparation of ZrO2/Al2O3-pillared Saponite and Its Spectroscopic Investigation on NOX Adsorption

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  • Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Immobilization of Dithizone onto Chitin Isolated from Prawn Seawater Shells (P. merguensis) and its Preliminary Study for the Adsorption of Cd(II) Ion

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  • Nano-dimensional MnO2 were prepared in ethanol – water media from their inorganic salts by parallel redox reactions. The pH of solution, concentration of the salts and ethanol as well as reaction temperature were the key parameters for forming of nano-particles and anticoagulation. The MnO2 particles in colloidal solution then were coated on calcinated laterite grains to create new adsorption materials.

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  • Tuyển tập các báo cáo nghiên cứu khoa học ngành toán học được đăng trên tạp chí toán học quốc tế đề tài: Adsorption and desorption characteristics of arsenic onto ceria nanoparticles

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Biomagnetic of Apatite-Coated Cobalt Ferrite: A Core–Shell Particle for Protein Adsorption and pH-Controlled Release

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  • The solid gas interface general considerations, adsorption of gases and vapors on solids, chemisorption and catalysis is the main content of the book "Physical Chemistry of Surfaces". Invite you to consult the text book for more documents serving the academic needs and research.

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