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Structural packing

CMPs pack to maximise van der Waals interactions between the polymer chains. This packing can be fmstrated by topological considerations [Pg.161]

Within a singular framework, stiff networks are less able to respond to the local environment by adapting their molecular configuration than more flexible polymers. This means that, for the individual framework, a stiff polymer is more likely to be open and the nodes well dispersed. A flexible polymer will be able to pack more efficiently, even if no network interpenetration is taken into account. [Pg.162]

Network interpenetration is energetically favourable as it increases the van der Waals interactions between frameworks and therefore allows space to be packed more efficiently. Frameworks where the node-to-node distance is comparatively large compared to the width of the strut will have space for network interpenetration to occur. Those that have comparatively short struts may inhibit network interpenetration simply due to geometric space considerations. [Pg.162]

The flexibility of the network can also directly influence the degree of network interpenetration. CMPs with long flexible node-struts are able to respond to the local environment through bending of the strut and twisting around the node to allow individual frameworks to find space to pack efficiently in to. [Pg.162]


Foi structured packings, values correspond to crimp height. [Pg.173]

D. Rectification in vertical wetted wall column with turbulent vapor flow, Johnstone and Pigford correlation =0.0.328(Wi) Wi P>vP 3000 < NL < 40,000, 0.5 < Ns. < 3 N=, v,.gi = gas velocity relative to R. liquid film = — in film -1 2 " [E] Use logarithmic mean driving force at two ends of column. Based on four systems with gas-side resistance only, = logarithmic mean partial pressure of nondiffusing species B in binary mixture. p = total pressure Modified form is used for structured packings (See Table 5-28-H). [Pg.607]

Counter-current flow. Structured packings. Gauze-type with triangular flow channels, Bravo, Rocha, and Fair correlation... [Pg.623]

Refitting of a tray-type column is desired to increase loading, increase efficiency, and/or decrease pressure drop. Structured packing is pariicularly applicable in this case. [Pg.1346]

Liquid rates are very low and/or vapor rates are high, in which case structured packing may be particularly desirable. [Pg.1346]

For ordered, or structured, packings, pressure-drop estimation methods have been reviewed by Fair and Bravo [Chem. Eng. Progr, 86(1), 19 (1990)]. It is not common practice to use the packing factor approach for predicling pressure drop or flooding. For operation below the loading point, the model of Bravo et [Hydrocarbon... [Pg.1388]

Proc., 65(3), 45 (1986)] is preferred. To use this and alternate models, dimensional characteristics of structured packing must be defined. Figure 14-51 shows nomenclature and definitions of key dimensions. Not shown, but also important, is the angle the corrugations make with the horizontal (usu y 45 or 60°). Then the Rocha et al. predictive equation is ... [Pg.1388]

Sepn. Purif., 3, 19 (1989)] takes holdup into account and applies to random as well as structured packings. It is somewhat cumbersome to use and requires three constants for each packing type and size. Such constants have been evaluated, however, For a number of commonly used packings. A more recent pressure drop and holdup model, suitable for extension to the flood point, has been pubhshed by Rocha et al. [Jnd. Eng. Chem. Research, 35, 1660 (1996)]. This model takes into account variations in surface texturing of the different brands of packing. [Pg.1390]

Representative pressure drop data for random and structured packings are given in Figs. 14-52-14-54. [Pg.1390]

FIG. 14-59 Typical vendor data for liquid holdup of a structured packing, Gempak 2A. [Cou7tesy Glitsch, Inc., Dallas, Texas.]... [Pg.1394]

FIG. 14-60 Comp arison of measured and calculated values of liquid holdup for Gempak 2A structured packing, air-water system. [Rocha et al., Ind. Eng. Chem., 32, 641 (1.9.93).] Reproduced with permission. Copyright 199.3 American Chemical Society. [Pg.1394]

Efficiency data for a representative structured packing at two column diameters are shown in Fig. 14-74. The Max-Pak packing has a surface area of 246 m /m (7.5 ft /fE). The same test mixture (cyclo-hexane//i-heptane) and operating pressure was used for both tests. It would appear that column diameter does not have an influence in this range of values (0.43 to 1.2 m). [Pg.1400]

Efficiency and pressure drop data for Siilzer BX metal gauze structured packing and for three test mixtures are shown in Fig. 14-7.5. For the ethyl benzene/styrene test mixture, the effect of operating pressure is shown. The high viscosity mixture, propylene glycoL/ethylene... [Pg.1400]

FIG. 14-74 HETP values for Max-Pak structured packing,. 35 kPa (5 psia), two column diameters. Cyclohexane/n-heptane system, total reflux. For 0.4.3 m (1.4 ft) column perforated pipe distributor, 400 streams/m2, 3.05 m (10 ft) bed height. For 1.2 m (4.0 ft) column tubed drip pan distributor, 100 streams/m ,. 3.7 m (12 ft) bed height. Smaller column data. University of Texas/Austin Larger column data. Fractionation Research, Inc. To convert (ft/s)(lb/ft ) to (m/s)(kg/m ) , multiply by 1.2199. (Couiiesy Jaeger Troducts, Inc., Housion, Texas.)... [Pg.1400]

Structured packing efficiency is about 1.5 times that of plates or random packing. [Pg.1407]

At a parameter of 0.02, the structured packing has a 1.3-1.4 capacity advantage over random packing and plates. This advantage disappears as the parameter approaches 0.1. [Pg.1407]

Structured packing has about the same capacity as plates and random packings. [Pg.1407]

The efficiency advantage of structured packing over random packings and plates decreases from 1.5 to 1.2 as the parameter increases from 0.1 to 0.3... [Pg.1407]

The loss of capacity of structured packing is greatest in this range. [Pg.1407]

The random packing appears to have the highest capacity and efficiency, and structured packing the least capacity and efficiency. [Pg.1407]

Table 7 show s ranges of pressure drop for design. Pressure drop sets the allowable vapor flow rate. The flood pressure drop, for random or structure packings, is given in Reference 15 as ... [Pg.85]

Generalizations are not as easy for structured packings as for random packings. See the following subsection, Comparison to Trays, for study type structured packing data. [Pg.88]

Reference 13 is recommended for its large database of structured packing infonnation. One parameter for structured packing within the narrative of Reference 13 is that the minimum w etting rate is 0.1 to 0.2 gpm/ft compared to 0.5 to 2gpm/fT for random packings. [Pg.88]

Tlie flood pressure drop for structured packing, already shown in the subsection on random dumped packings, is repeated here ... [Pg.88]

In addition, Kqa data are given for some structured packing in Chapter 4 Absorbers—Inorganic Type. [Pg.88]

The structured packing efficiency is about 50% higher than either the trays or the random packing. [Pg.92]


See other pages where Structural packing is mentioned: [Pg.938]    [Pg.606]    [Pg.666]    [Pg.1292]    [Pg.1346]    [Pg.1349]    [Pg.1385]    [Pg.1388]    [Pg.1391]    [Pg.1394]    [Pg.1394]    [Pg.1395]    [Pg.1396]    [Pg.1397]    [Pg.1399]    [Pg.1401]    [Pg.1404]    [Pg.1405]    [Pg.1405]    [Pg.1407]    [Pg.1476]    [Pg.76]    [Pg.77]    [Pg.79]    [Pg.88]   


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Alloys closed packed structure

Alloys with Closed Packed Structure

Amino-phase packing surface structure

Amorphous dense randomly packed structure

An alternative representation of close-packed structures

Analyses of Structure Packing via X-Ray, Synchrotron, and Other Techniques, Including Spectroscopic Tools

Angle, structured packings

Angle, structured packings crimp

Angle, structured packings element rotation

Body-centred cubic close-packed structure

Brick structured packing

Cage-type packing structure, inclusion

Cage-type packing structure, inclusion complexes

Card-pack structure

Characterization of packing structures

Close packed lattice structures

Close packing structure

Close-Packed Crystalline Structures

Close-Packed Sphere structure

Close-Packed Sphere structure Coating

Close-packed ceramic crystal structures

Close-packed element structure types

Close-packed metal crystal structures

Close-packed structure (

Close-packed structure crystal - face-centred

Close-packed structures, geometric requirements

Closed Packed Structures of Metals

Closed-packed structure

Closest packed structures

Closest-packed crystal structures

Closest-packed crystal structures cubic

Closest-packed crystal structures hexagonal

Column internals structured packing

Compact-packed crystal structure

Cr3Si, cP8, structural type an example of tetrahedrally close-packed phases

Crystal Structures and Close-packing of Spheres

Crystal packing molecular structures

Crystal structure close-packed

Crystal structure closest packing

Crystal structure packing

Crystal structure packing efficiency

Crystal structure packing spheres

Crystal structures cubic close packed

Crystal structures hexagonal close packed

Crystalline solids close-packed structure

Cubic close packing structures

Cubic close-packed lattice structure

Cubic close-packed structure

Cubic closed-packed crystal structure

Cubic closest packed structure

Dense random packing hard disk structure

Diffraction Structures and Chain Packing in the Crystal

Dispersed Phase Hold-Up in Packed Columns Containing Random and Structured Packings

Distillation columns structured packing

Double Close-Pack Structures

Extraction structured packing

Face close-packed structure

Face-Centered Cubic Versus Hexagonal Close-Packed Structures

Face-centered cubic structure close packed planes

Face-centred cubic close-packed structure

Fractionators structured packings

Functional and Structural Efficiency in Packed Towers

Geometrical Features of Corrugated Structured Packings

Geometrical requirements in the close-packed structures

Hard disks dense random packings, structural

Height structured packing element

Hexagonal close-packed structure

Hexagonal close-packed structure anion stacking

Hexagonal close-packed structure slip systems

Hexagonal close-packed structure twinning

Hexagonal close-packed structure unit cell volume

Hexagonal close-packed structure, high

Hexagonal closest packed hep) structure

Hexagonal closest packed structure

Hexagonal dose packed structures

Hexagonal-closest packing crystal structure

Hydrogen Bonding and Molecular Packing in Multi-functional Crystal Structures

Ionic structures in terms of anion packing

Irrigated structured packings

Lamellar structures, packing behavior

Layer-type packing structure

Mass transfer efficiency structured packing performance

Mass transfer efficiency structured packings

Mass transfer structured packings

Metal closest-packed crystal structures

Mobile phases, column packing structure

Molecular structure packing analysis

Molecular structures, properties and packing

Molecule packing structure

Montz-Nutter structured packing

Packed beds packing structure

Packed beds structure-based approach

Packed column structured packings

Packed columns, packing structured packings

Packed structures

Packed structures

Packed tower design structured packing

Packed towers structured

Packed towers structured packings

Packing density, protein structural

Packing material structured

Packing performance, random structural

Packing structure, inclusion complexes

Packing structured type

Packing structured, dehydration

Packings Flexipac Structured

Packings of Spheres. Metal Structures

Packings structure

Packings structure

Packings, structured aqueous systems

Packings, structured channel width

Packings, structured definition

Packings, structured failures

Packings, structured fires

Packings, structured geometry

Packings, structured perforations

Packings, structured sheeting

Packings, structured startup/shutdown

Packings, structured surface

Particle packing structure

Particle packing structure dense random

Particle packing structure loose random

Passive structured packing

Performance structured packings

Perovskites close-packed lattice structure

Pressure Drop of Irrigated Random and Structured Packings

Rectification structured packings

Secondary structure packing

Silica ordered sphere packing structure

Silica supports column packing structure

Solid structures packing efficiency

Solutes, column-packing structure

Sphere-packing models applied to structures of elements

Stabilizer structured packing

Structure Types with Occupied Octahedral Interstices in Closest-packings of Spheres

Structure formation packings

Structure packed bed

Structure packing density

Structure types hexagonal close-packed

Structured Packing Evolution

Structured Packings for Vacuum Rectification

Structured packing

Structured packing Koch Flexipac

Structured packing Panapak

Structured packing efficiency

Structured packing features

Structured packing flooding

Structured packing maximum operational capacity

Structured packing performance features

Structured packing pressure drop

Structured packing scale

Structured packing vacuum distillation

Structured packings technical data

Structured-type packing, liquid

Structured-type packing, liquid holdup

Structures Derived of Body-centered Cubic Packing (CsCl Type)

Structures Formed by the Close Packing of Spheres

Structures hexagonally packed cylinders

Structures in terms of non-metal (anion) packing

Support, packing structure

Template packing structure

Tetrahedrally close-packed structures

Tetrahedrally close-packed structures type)

The cubic close-packed (Al) structure of copper

Transfer Coefficients in a Column with Structured Packing

Trays vs. Structured Packings

Trigonal packing frustrated structures

Types of Corrugated Structured Packings

Types of Wire-Mesh Structured Packings

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