Archive for October, 2006
Hydrothermally Solidified Mesoporous Material from Water Purification Plant Sludge
Abstract
The recycling technology of sludge from water purification plant was investigated using hydrothermal reaction. The calcined sludge at 600°C for the removal of organic compound was mixed with 0 – 20 mass% of Ca(OH)2. Specimens were formed by uniaxial pressing at 30 MPa and hydrothermal treatment under saturated steam pressure at 220°C for [...]
Molecules Travelling Through Nanospace and the Relation With Potential Storage Space For Hydrogen Fuel Cells – Supplier Data By Quantachrome Instrumen
Background
For a molecule travelling through nanospace the likelihood of crashing is great! If not with other molecules, certainly into the walls of the canyon-like nanopores through which nano-flight is taken. And as the canyon narrows and the temperature falls, the chance of escaping the crash site diminishes.
AZoM – the A to Z of Materials – [...]
Atomic Pair Distribution Function Used to Analyse Electride Nanomaterials
Crystallography is an extremely useful tool for analysing conventional materials. Using techniques such as x-ray diffraction, long range order and symmetry can be determined using principles such as Bragg’s law. The peaks produced in the associated diffraction patterns can yield valuable information about the atomic structure of these materials.
However, these techniques are generally not suited [...]
Optical and Structural Properties of PbS Nanoparticles in Zeolite Na-X
Abstract
PbS nanoparticles were synthesized in zeolite Na-X by means of Pb2+ exchange followed by sulfidation produced by reaction with thiourea in solution at several temperatures. Three samples were prepared at sulfidation temperatures of 65, 75 and 95ºC. The crystalline structure of system PbS-Na-X was studied by x-ray diffraction measurements. The average size [...]
Physisorption Determinations By Gas Sorption – Supplier Data By Micromeritics
Background
Most atoms that make up a solid are bound on all sides by other atoms in the bulk of the solid. The atoms on the surface of the solid, however, are incompletely bound. Due to van der Waals forces of interaction, these surface atoms are more reactive and they attract gas, vapour and liquids to [...]
Preparation of Polycarbosilane Using a Catalytic Process
Abstract
Polycarbosilane was synthesized from polydimethylsilane in the presence of zeolite as a catalyst. Characterization of synthesized polycarbosilane was performed with 29Si Solid State Nuclear Magnetic Resistance (NMR), Fourier Transform Infrared Spectroscopy (FT-IR), Temperature Programmed Desorption (TPD), Thermal Gravimetric Analysis (TGA), X-ray diffraction (XRD) and Gel Permeation Chromatography (GPC) analysis. The number average molecular [...]
Room Temperature Adsorption Measurements of Gases and Vapours on Molecular Sieves, Microporous Materials and Other Adsorbents Using the Gemini Analyze
Background
Room Temperature Option (P/N: 237-33000-00) for the Gemini analyzer is now available. This option allows you to measure gas and vapor adsorption on samples at temperatures in the range of -70°C to +100°C.Introduction
The Room Temperature Option provides a faster, simpler way to characterize adsorbents intended for use in pressure-swing air separators, volatile organic chemical recovery [...]
Synthesis, Characterization and Catalytic Activity of CoAl2O4 and NiAl2O4 Spinel – Type Oxides for NOx Selective Reduction
Abstract
CoAl2O4 and NiAl2O4 spinels were prepared by sol-gel method with citric acid. By powder X- ray diffraction the formation of CoAl and NiAl spinels was investigated, changing the calcination temperatures and the molar ratio of citric acid to the metals. These catalysts were characterized by temperature-programmed reduction, temperature-programmed desorption of CO and nitrogen [...]
Zeolite Membranes Prepared by the Dry Gel Method for Gas Separation
Abstract
Zeolite membranes were synthesized by the dry gel method, using a tubular support of stainless steel. The membranes were able to separate different gases such as N2, SF6, and hydrocarbons contained in natural gas. A remarkable separation effect concerning the adsorption properties of the zeolite was identified.Keywords
Dry Gel, Tubular Supports, Zeolite Membranes, Gas Permeation, Separation [...]
Analysis of Ferrous Alloys, Non-Ferrous Alloys, Precious Metals and Metal Coatings Using X-Ray Systems – Supplier Data by PANalytical
Ferrous Metals
The major products of the ferrous industry are cast iron, low and medium alloyed steels and specialty steels such as tool steels and stainless steels. In the production processes used to manufacture these end products other important materials encountered are refractories, sinters and slags, and of course the starting raw materials iron ore together [...]
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