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Material / Composition:

Porous?

Shape / Form:

Specific Surface Area:

Pore Size:

Help with Catalyst Supports and Carriers specifications:

Material / Composition
           
   Your choices are...         
   Aluminum Oxide       Alumina or aluminum oxide is a very common and versatile ceramic material. Aluminum oxide is produced through fusion, chemical precursors and precipitation, calcination, and/or sintering processes. Sol-gel aluminum oxide is produced in using chemical ceramic technology. Very high porosity carriers can be produced through sol-gel or chemical processing methods.  
   Carbon / Graphite       Carbon without a crystalline structure is referred to as amorphous, vitreous, or glassy carbon. Graphite is a carbon material with an anisotropic or hexagonal crystal structure. Hexagonal or flake graphite has a weak, platelet structure that flakes or wears away quickly, providing a lubricating action. Pyrolytic graphite (PG) materials have a high density, are layered, and have a highly anisotropic crystal structure. Pyrolytic graphite is a unique form of graphite manufactured by decomposition of a hydrocarbon gas at very high temperature in a vacuum furnace. Generally, its mechanical, thermal, and electrical properties are far superior to conventional hexagonal (flake) structured or bonded materials. 
   Ceramic       Ceramic and inorganic supports, carriers, and media include aluminum oxide, silicon carbide, zirconia, silicate, fused silica.   
   Metal       Metal supports and media includes metal shot or balls, cut wire, metal powder, structured metal foil or sheet, wire mesh, metal balls, metal fibers, metal foam, and other shaped media. 
   Mineral       Catalyst support consisting of mined or mineral-based material. Sand, betonite, bauxite, zeolite, pumice, and some forms of silica or silicate are examples of minerals. 
   Plastic       Both thermoplastic and thermoset resins are used to produce plastic catalyst supports or carrier media.  
   Porcelain       Traditional porcelain is made from a mixture of feldspar, clay (koalin) and flint. Porcelains can be aluminum silicate, magnesium silicate, or aluminum magnesium silicate based, depending on the raw materials or minerals selected. 
   Silica / Glass       Silica and glass materials are based on silicon dioxide with various chemical additives. 
   Silicon Carbide       Silicon carbide is a synthetic ceramic first developed in the late 1800s.  SiC is harder than aluminum oxide, but more friable than fused aluminum oxide grains. Levels and types of impurities distinguish the green and black forms of silicon carbide. 
   Stainless Steel       Stainless steel media is often in the form of stainless steel shot, stainless steel peening balls, or cut stainless steel wire.  
   Titania       Catalyst supports or carrier media consists of titanium dioxide material. Titania provides a high purity material for reactions.  
   Zirconia       Catalyst supports or carrier media consists of zirconium oxide material. Zirconia is a very tough and wear resistant ceramic. 
   Specialty / Other       Other specialty, proprietary, or patented material. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Porous?       A porous carrier consists of a material with open pores to the surface. High porosity provides greater surface area for catalyzing reactions. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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Shape / Form
           
   Your choices are...         
   Balls / Spheres       Catalyst carriers are in the form of ball or pellet shapes that the catalyst adheres to. 
   Extrudate / Pellet       Catalyst carrier in the form of pellets or extruded shapes such as rods. 
   Fibers / Mesh       Catalyst carriers are in the shape of fiber, non-woven matts, or woven mesh. 
   Foam / Reticulated       Catalyst support consists of foam or reticulated structure, which provides a high surface area carrier with very open porosity. 
   Formed Sheet / Foil       Catalyst supports fabricated by forming metal sheet into corrugated shapes and then stacking the sheet or winding foil into spiral bundles resulting in a high surface area carrier. 
   Honeycomb / Structured Material       Honeycomb, channeled or structured carriers have a high surface area, which is also self-supporting. Some structured carriers have three dimensional network of columns or a 3D grid. 
   Powder / Spray Dried       Catalyst carriers are in the shape of powder, spray dried or granular material. 
   Rings       Catalyst carriers are in the form of a ring or hollow cylinder shape. 
   Specialty / Other       Catalyst carriers are available in an unlisted or proprietary shape or form. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Surface Area
   Specific Surface Area       Specific surface area range is given as the surface area in square meters per gram of a sample. Specific surface area is proportional to specific pore volume, and inversely related to the pore diameter. It is measured by nitrogen adsorption. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Pore Size       Pore size or diameter is given as a distance, usually in nanometers or angstroms. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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