Impregnated carbons

Grapliite is used widely in process plants for its liigh thermal conductivity (about six times that of stainless steel). Typical properties of impregnated carbon and grapliite are given in Table 3.39. 

Impregnated carbon and grapliite can be used up to I80°C, and porous graphite can be used up to 400°C in oxidizing environments and 3000°C in a reducing atmosphere. Carbon and graphite bricks and tiles are used for... 

Hydrochloric Acid, 32% Impregnated Carbon Impregnated Carbon 18-8 Stainless Steel Impregnated Carbon Mechanical... 

Be careful to keep track of which side is the active side of the catalyst impregnated carbon cloth. The active side has more of the carbon-platinum binder powder and is smoother. 

Hot isostatic pressing (HIP), 16 169 cemented carbides, 4 657 ceramics processing, 5 662 Hot isostatic pressure impregnation carbonization (HIPIC), 26 767 Hot-melt adhesives, 1 530-532... 

Che et al. also prepared Pt/Ru nanoparticle-filled carbon tubes with a diameter of 200 nm (40). They impregnated carbon-deposited film with a mixture of aqueous solutions of HiPtClf, and RuCI3. After drying in air, the metal compounds in the pores were reduced by H2 flowing at 580°C for 3 h. Then the underlying alumina was dissolved away in HF solution. TEM observation of this sample revealed the presence of Pt/Ru nanoparticles (about 1.6 nm) dispersed on the inner wall of the tubes. 

Figure 4. Galvanostatic polarization curves for the metal fluoride impregnated carbon in the fluorine cell...

For more than 10 years (138-143) it has been known that by reaction of dispersed Pt on soot with nonnoble metals of Group IV B and V B dispersed alloys are formed. Treating Pt-impregnated carbons, to which salts of these metals had been added, at 900°C in inert atmosphere (Ar) leads to formation of highly dispersed Pt-Cr or Pt-V alloys. The metal salt is reduced to the metal by the soot and forms the respective platinum alloy in situ. These alloy crystallites are reported to be highly active catalysts for phosphoric acid fuel cells. 

Galvanostatic, for metal fluoride impregnated carbon ElOa, 165 of KF 2HF ElOa. 164... 

MgO-supported carbon catalyst was also prepared by impregnating an aqueous magnesium sulfate solution. The dried impregnated carbon was washed with concentrated ammonium hydroxide solution to convert the sulfate into magnesium hydroxide. This washed carbon was dried and heated in a tubular reactor as just described to convert the hydroxide to oxide. 

Activated charcoal, also known as activated carbon, is used to remove various chemical substances from the air. It is used, among other things, in masks, rugs (in a closet, for example) and in air purifiers. Conventional air purifiers often use activated carbon, but usually this is insufficient for an MCS patient. Impregnated carbon generally works much better, because it can bind itself to more substances and therefore cleans more substances from the air. (Impregnated implies that a porous solid substance is drenched in a liquid to protect the product and, in this case, to improve its efficiency.) For this reason most air purifiers suitable for MCS use impregnated carbon rather than activated carbon. 

These do purify chemical substances from the air, but active carbon alone usually doesn t satisfy the needs of an MCS patient. Impregnated carbon (whereby a chemical particle has been added to the carbon) augments the purifying capacity. For this reason almost all MCS air purifiers use a filter medium made of impregnated carbon. 

Besides polymers and inorganic materials, commercially available porous carbons can be employed to immobilize Mo. For instance, the utility of Mo-impregnated carbon molecular sieves as epoxidation catalyst has been demonstrated by Gaffney et al. (249). For example, in a patent 1-octene... 

Farahmandi C, Dispennette J, Blank E, Kolb A. Maxwell Technologies. Multi-electrode double layer capacitor having single electrolyte seal and aluminium-impregnated carbon cloth electrodes. US patent /1996/000726728. 

L. A. Jonas, Reaction steps in gas sorption by impregnated carbon, Carbon 16, 115-119 (1978). 

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