n- and isoalkane adsorption mechanisms on zeolite MCM-22

Article Abstract:

Low-coverage adsorption properties of linear and branched alkanes on zeolite MCM-22 were determined using the chromatographic technique at temperatures between 420 and 540 K. The results revealed that adsorption enthalpy and entropy of linear alkanes vary in a nonmonotonic way with carbon number and the adsorption behavior of alkanes was rationalized on the basis of the pore geometry.

Science & research, Research, Optical properties, Alkanes, Adsorption, Enthalpy, Atomic properties

---

Synthesis of high-quality MCM-48 mesoporous silica using Gemini surfactant dimethylene-1,2-bis(dodecyldimethylammonium bromide)

Article Abstract:

High quality ordered cubic mesoporous silica is prepared through the S(super +)I(super -) route by using the Gemini surfactant with the short spacer group as structure-directing agent and sodium silicate as precursor. The findings indicate that the pore structure of the resulting mesoporous silica belonged to the cubic structure.

Industrial sand, Silica & Silica Sand, Industrial Sand Mining, Electric properties, Silica, Bromides, Silicon dioxide, Bromides (Chemistry)

---

Transition metal modified TiO2-loaded MCM-41 catalysts for visible- and UV-light driven photodegradation of aqueous organic pollutants

Article Abstract:

A number of transition metal incorporated MCM-41 mesoporous molecular sieves with Si/Me = 80 have been synthesized by a hydrothermal method. The catalytic performances have been correlated with the UV-vis spectrum of each synthesized catalyst to reveal the specific role played by each metal ion.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Molecular Sieves, Analysis, Thermal properties, Transition metal compounds

Similar abstracts:

• Abstracts: UV-vis spectroscopy of iodine adsorbed on alkali-metal-modified zeolite catalysts for addition of carbon dioxide to ethylene oxide
• Abstracts: Self-photosensitized oxidative transformation of Rhodamine B under visible light irradiation in aqueous TiO2 dispersions
• Abstracts: The influence of solution anion on the mechanism of transpassive dissolution of ferrous- and nickel-based alloys
• Abstracts: Readsorption and adsorption-assisted desorption of CO2 on basic solids. Mechanism and site requirements for activation and chemical conversion of methane on supported Pt clusters and turnover rate comparisons among noble metals
• Abstracts: Single-sphere model for absorption spectrum of interfacial molecules with application to predictions of orientational angles

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.