搜索结果: 16-30 共查到“化学 adsorption”相关记录33条 . 查询时间(0.057 秒)
Cu-MCM-41介孔分子筛中不同价态铜上的吸附性能研究（Adsorption Behavior of Copper with Different Valences States in Cu-MCM-41）
Cu-MCM-41 介孔材料 CO吸附 C2H4吸附 吸附量热 红外光谱
2010/8/25
合成了不同铜含量的Cu-MCM-41，高温还原后仍具有良好的介孔结构。孔壁中的铜容易被H2还原为Cu(0)。通过在氦气流中加热，可以导致孔壁中的Cu(II)还原为Cu(I)。MCM-41中不同价态的铜具有不同的吸附性能：Cu(0)强烈吸附O2，吸附热高达427 kJ·mol-1；Cu(I)在室温下几乎不吸附O2，表明Cu(I)在室温下较稳定；而Cu(I)在对CO与C2H4的吸附中，除了CO的吸附热...
Cobalt Impregnated Alumina: Nitrogen Adsorption Study at 77 K
Cobalt Impregnated Alumina Nitrogen Adsorption Study 77 K
2010/4/20
Alumina powder is impregnated with cobalt in the concentration range 5% to 20% (w/v) and is characterized by nitrogen adsorption at 77 K by continuous flow method using the Quantasorb sorption system....
Kinetics Study of Lead ion Adsorption on Active Carbon
Kinetics Study Lead ion Adsorption Active Carbon
2010/4/20
The kinetics of the adsorption of lead ions on active carbon from aqueous solutions was studied at room temperature at different lead ion concentrations (i.e. 0.1-0.5 g/L). The kinetics of the lead io...
Adsorption of Arsenate and Chromate from Waters on Hydrophobized Zeolitic Media
Octadecylammonium-clinoptilolite adsorption anion-exchange chromate and arsenate oxyanions montmorillonite
2010/4/21
A laboratory setup was used to examine the uptake of chromate and arsenate from aqueous solutions by octadecylammonium acetate [ODA]-modified inland clinoptilolite. In trials, a natural variety of mon...
Silver Removal from Aqueous Solution by Adsorption on Concrete Particles
Concrete Equilibrium constants Intrinsic acidity constants Silver adsorption Surface acidity
2010/4/21
The ability of concrete to remove silver from its aqueous solutions was studied. Silver removal is favored by low concentration and high pH at room temperature. The intrinsic acidity constants, averag...
Determination of the Micropore Structures of Activated Carbons by Adsorption of Various Dyestuffs from Aqueous Solution
Activated carbon analysis of pore structure dyestuff adsorption N2 adsorption
2010/4/22
In this study, some activated carbons prepared from sour cherry pits under various conditions were investigated. For comparison purposes, the commercial activated carbons Merck-2514 and Merck-2184 wer...
A Study of the Adsorption of Phenol by Activated Carbon from Aqueous Solutions
Phenol active carbon adsorption and aqueous solutions
2010/4/22
A commercial active carbon was tested as an adsorbent for the removal of phenol from aqueous solutions. The optimum conditions for maximum adsorption in terms of shaking time, amount of the adsorbent,...
Solvent, Temperature and Concentration Effects on the Adsorption of Poly(n-Butyl Methacrylate) on Alumina from Solutions
poly(n-butyl methacrylate) solubility parameter alumina adsorption solvent
2010/4/22
Adsorption of poly(n-butyl methacrylate) (PnBMA) on alumina from solution was studied by UV and FT-IR Photoacoustic Spectroscopy techniques. The effects of the solvent, temperature, concentration, and...
Adsorption of Non-ionic Surface Active Agent on Fine Coal and Lignite
Reagent adsorption adsorption kinetics coal-lignite
2010/4/23
The adsorption of Triton X-100 in aqueous solution on the less than 53 \mm size fractions of Tunçbilek lignite and Zonguldak bituminous coal was studied. The adsorption isotherms were formed fo...
Adsorption of Some Textile Dyes by Hexadecyltrimethylammonium Bentonite
Organoclay Textile dyes Adsorption isotherms Langmuir equation Dubinin-Rasdushkevich (D-R) equation
2010/6/27
In this study, hexadecyltrimethylammonium (HDTMA) bentonite was synthesized by placing alkylammonium cation onto bentonite. Adsorption of some textile dyes such as Everdirect Supra Yellow PG, Everdire...
Adsorption of Some Heavy Metal Ions from Aqueous Solution by Activated Carbon and Comparison of Percent Adsorption Results of Activated Carbon with those of Some Other Adsorbents
Heavy metal adsorption activated carbon chitosan agar adsorption from aqueous solution adsorption kinetics adsorption isotherm
2010/6/27
In this study, removal of some heavy metals ions (Mn2+, Fe2+, Ni2+ and Cu2+) from aqueous solution by adsorption was investigated. For this purpose, high-grade MnSO4.H2O, FeSO4.7H2O, NiSO4.7H2O and Cu...
Effect of Non-ionic Reagent Adsorption on Zeta Potential of Fine Coal Particles
zeta potential non-ionic reagents coal
2010/6/28
The -5 mm size fractions of two low rank British coals were used in zeta potential measurements. The electrophoretic behaviour was described by the Helmholtz-Smoluchowski equation. The non-ionic reage...
The Measurement of Surface Areas of Some Silicates by Solution Adsorption
Surface area determination solute adsorption adsorption from solution
2010/6/29
In this study, the adsorption from solution technique was used for the determination of surface areas of some silicate samples (bentonite, sepiolite, zeolitic tuff and kaolin). Methylene blue (MB), or...
Acidity of Silica-Alumina Catalysts By Amine Titration Using Hammett Indicators and FT-IR Study of Pyridine Adsorption
Acidity of Silica-Alumina Catalysts Amine Titration Hammett Indicators FT-IR Study Pyridine Adsorption
2010/6/30
In this study, characterization and surface acidity of Siral (SiO2-Al2O3) compounds were investigated with Hammett acidity functions, the n-butylamine titration method and FTIR analysis of the spectra...
Investigation of Adsorption Isotherms of Myristic, Palmitic and Stearic Acids on Rice Hull Ash
Adsorption free energy of adsorption Langmuir isotherm myristic, palmitic stearic acids rice hull ash
2010/6/28
The adsorption of myristic, palmitic and stearic acids on rice hull ash from isooctane as solvent was studied and conformed to a Langmuir isotherm. Monolayer coverage was determined to be 40.08, 38.43...