Activated
Carbon
Yuanying activated carbon has big specific surface area, abundant pore structure, high
mechanical strength, strong adsorption capacity, easy regeneration.
Activated
Carbon apertures divide into macropore (radius 1000-1000000 A), transition hole
(radius 20-1000A), micropore (radius -20A). Air purification activated carbon
mainly has micropore, its apertures must be a little big than harmful gas,
specific surface area and pore volume bigger is better, these are very
beneficial to adsorb harmful gas.
The
raw materials of water treatment activated carbon have coconut shells, walnut
shell, apricot, peach shell, wood, coal and so on, the coconut shell activated
carbon is considered the best water treatment activated carbon. Water treatment
activated carbon has powder, granule and columnar, among them granule is the
most widely used. The smaller granularity, the faster absorption, but head loss
increases, usually in 8-30 mesh is better.
One
of important application of Activated Carbon is as catalyst support and
promoter, also can be directly as catalyst. As a support, mainly used to
support catalyst, lets catalyst load on its surface and makes it possesses
certain physical and chemical property, support itself generally does not have
catalytic activity. Common supports include activated alumina, activated
carbon, molecular sieve, clay, honeycomb ceramics, monox, kaolin, diatomite,
etc. Usually used “active component-support name” to indicate supported
catalyst composition, for example, Pd-activated carbon catalyst for
hydrogenation, Pt-honeycomb ceramics catalyst for automotive exhaust
purification.
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