packed bed

(redirected from Packed column)

packed bed

[′pakt ′bed]
(chemical engineering)
A fixed layer of small particles or objects arranged in a vessel to promote intimate contact between gases, vapors, liquids, solids, or various combinations thereof; used in catalysis, ion exchange, sand filtration, distillation, absorption, and mixing.
References in periodicals archive ?
TOKYO, Sept 1, 2017 - (JCN Newswire) - Showa Denko ("SDK"; TSE:4004) will start selling next month five new types of Shodex(TM) high-performance liquid chromatography (HPLC) columns, namely, "GPC HK-401," "GPC HK-405" and "GPC HK-HFIP404L" packed columns for gel permeation chromatography (GPC*1: size exclusion chromatography [SEC*2] using organic solvents) as well as "OHpak(TM) LB-805" packed column for gel filtration chromatography (GFC*3: SEC using aqueous solvents) and "IEC SP-FT 4A" packed column for ion exchange chromatography*4.
However, the operation requires higher pressure in pumping the liquid through the packed column.
Inlet Configuration: Must be configurable to two injector ports with the following options: Split/Splitless capillary, Programmable split/splitless capillary, Programmable on-column capillary, or packed column injector.
Hydralazine has been determined by GC after derivatization with nitrous acid [18] or with acetyl acetone [19, 20] using packed column.
Creation of this buffer gradient on the packed column showed the impact of buffer pH and conductivity simultaneously on the two proteins to be separated.
The fan discharges into the distribution chamber and the air passes wet and dry bulb thermocouples before it enters the packed column.
If that isn't enough for one jam packed column on Friday I witnessed Kingsley Chapman and the Murder serve up a sensational set at the 10th birthday party for the wonderful NARC magazine.
The first coupling of SFE to SFC with a capillary column was by Hawthorne [7] and Wright [8] in 1987, while McNally[9] and Engelhardt[10] reported the coupling with a packed column in 1988.
Outlet samples after treatment in each experiment were collected every 10 minutes from the bottom of packed column and the unadsorbed concentration of dyes in SSAS was analyzed by spectrophotometer.
2005, "Biosorption of copper, cobalt and nickel by marine alga Ulva reticulate in a packed column," Chemosphere, 60, pp.
The resulting packed column had sand bulk densities of ~ 1.
Among the reasons given for this emphasis is the considerable expense involved, the lack of an update of Supina's classic textbook, The Packed Column in Gas chromatography, and available Web resources (listed).