Global Information Lookup Global Information

Packed bed information


Super-Raschig rings
Structured packing

In chemical processing, a packed bed is a hollow tube, pipe, or other vessel that is filled with a packing material. The packed bed can be randomly filled with small objects like Raschig rings or else it can be a specifically designed structured packing. Packed beds may also contain catalyst particles or adsorbents such as zeolite pellets, granular activated carbon, etc.

The purpose of a packed bed is typically to improve contact between two phases in a chemical or similar process. Packed beds can be used in a chemical reactor, a distillation process, or a scrubber, but packed beds have also been used to store heat in chemical plants. In this case, hot gases are allowed to escape through a vessel that is packed with a refractory material until the packing is hot. Air or other cool gas is then fed back to the plant through the hot bed, thereby pre-heating the air or gas feed.

and 24 Related for: Packed bed information

Request time (Page generated in 0.8632 seconds.)

Packed bed

Last Update:

chemical processing, a packed bed is a hollow tube, pipe, or other vessel that is filled with a packing material. The packed bed can be randomly filled...

Word Count : 1229

Theoretical plate

Last Update:

processes as for the packed bed processes, namely: N t = H H E T P {\displaystyle N_{t}={\frac {H}{\mathrm {HETP} }}} In packed column chromatography...

Word Count : 1244

Archimedes number

Last Update:

applied often in the engineering of packed beds, which are very common in the chemical processing industry. A packed bed reactor, which is similar to the...

Word Count : 929

Heterogeneous catalytic reactor

Last Update:

diameter. The flow of a fixed bed reactor is typically downward. Packed bed reactor. A trickle-bed reactor is a fixed bed where liquid flows without filling...

Word Count : 1037

Reynolds number

Last Update:

first is successful in correlating the data for various types of packed and fluidized beds, the second Reynolds number suits for the liquid-phase data, while...

Word Count : 6365

Fluidized bed

Last Update:

fluidised beds, the contact of the solid particles with the fluidisation medium (a gas or a liquid) is greatly enhanced when compared to packed beds. This...

Word Count : 2124

Fluidized bed reactor

Last Update:

the fluid passes through the voids in the material. This is known as a packed bed reactor. As the fluid velocity is increased, the reactor will reach a...

Word Count : 1284

Chromatography

Last Update:

less solvent usage. In expanded bed adsorption, a fluidized bed is used, rather than a solid phase made by a packed bed. This allows omission of initial...

Word Count : 7373

Ergun equation

Last Update:

is the packed bed friction factor, Δ p {\displaystyle \Delta p} is the pressure drop across the bed, L {\displaystyle L} is the length of the bed (not the...

Word Count : 529

Distillation

Last Update:

superficial tower area as it enters the packed bed, the liquid to vapor ratio will not be correct in the packed bed and the required separation will not...

Word Count : 8499

Bioreactor

Last Update:

bioreactors are: moving media, also known as moving bed biofilm reactor (MBBR) packed bed fibrous bed membrane Bioreactor design is a relatively complex...

Word Count : 2080

Wet scrubber

Last Update:

collection efficiency is good for 5 μm particles and above. Packed-bed scrubbers consist of beds of packing elements, such as coke, broken rock, rings, saddles...

Word Count : 2799

Continuous distillation

Last Update:

superficial tower area as it enters the packed bed, the liquid to vapor ratio will not be correct in the packed bed and the required separation will not...

Word Count : 3138

Nonthermal plasma

Last Update:

powder form (packed bed), deposited on foams, deposited on structured material (honeycomb), and coating of the reactor walls Packed bed plasma-catalytic...

Word Count : 3540

Expanded bed adsorption

Last Update:

the eluent flow in the reverse direction; that is, as a conventional packed bed, in order to recover the adsorbed solutes in a smaller volume of eluent...

Word Count : 493

List of purification methods in chemistry

Last Update:

impurity. Chromatography employs continuous adsorption and desorption on a packed bed of a solid to purify multiple components of a single feed stream. In a...

Word Count : 747

Nuclear meltdown

Last Update:

developed, which propels the packed bed away from the wall when certain threshold of temperature is attained and the bed becomes lighter than the surrounding...

Word Count : 9470

Membrane reactor

Last Update:

(CMR); if the catalyst (and the support) are packed and fixed inside, the reactor is called packed bed membrane reactor; if the speed of the gas is high...

Word Count : 1747

Bubble column reactor

Last Update:

which consists of three main categories: trickle bed reactor (fixed or packed bed), fluidized bed reactor, and bubble column reactor. A bubble column...

Word Count : 3338

Catalytic converter

Last Update:

hexagonal). (Prior to the mid 1980s, the catalyst material was deposited on a packed bed of alumina pellets in early GM applications.) Metallic foil monoliths...

Word Count : 6629

Chemical reactor

Last Update:

Cn) Heat transfer coefficients (h, U) A tubular reactor can often be a packed bed. In this case, the tube or channel contains particles or pellets, usually...

Word Count : 1911

Coffee roasting

Last Update:

two basic types: drum and hot-air, although there are others including packed-bed, tangential and centrifugal roasters. Roasters can operate in either batch...

Word Count : 3680

Raschig ring

Last Update:

approximately equal in length and diameter, used in large numbers as a packed bed within columns for distillations and other chemical engineering processes...

Word Count : 745

Sabri Ergun

Last Update:

known for the Ergun equation, which expresses the pressure drop across a packed bed. Sabri Ergun was born on 1 March 1918 in Gerede in the Ottoman Empire...

Word Count : 235

PDF Search Engine © AllGlobal.net