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Filterpress cell

The importance of high rates of mass transport for a clean and efficient electrosynthesis using a filter press reactor has been stressed, and the effect of inclusion of a platic mesh turbulence promoter considered [56]. A multipurpose filterpress cell for continuous electrolysis of organic compounds has been described [57], and a mathematical model of the startup of a continuous parallel-plate reactor has been published [58]. [Pg.234]

Laboratory and industrial parallel plate cells (filterpress cells) are commercially available from ICI [60], Electrocell AB/Electrosynthesis [61], Reilly Tar and Chemical [62], and Electricity Company [63]. [Pg.234]

There were, until recently, few general-purpose filterpress cells available in a range of sizes. This situation has fortuiiately changed a number of cells are now available from various manufacturers and distributors as illustrated in Figs 2.30-2.32. [Pg.151]

The elevated-pressure cells operate at about 30 atm. In such cells, the bubbles of gas are reduced in size, decreasing the iR drop between the electrodes, and it is also possible to place the electrodes closer to the membrane. The energy efficiency is, however, not significantly better than the ambient-pressure cells and the design and manufacture is more difficult. Designs are normally based on a filterpress cell... [Pg.263]

A recent development has been the introduction of more efficient, flowthrough filterpress cells as replacements for the traditional tank cells. [Pg.274]

The construction and appearance of the filterpress cell has similarities with... [Pg.149]

Fig. 2.29 Modifications to the fundamental electrolyte path of a filterpress cell, (a) A third compartment which could act as a heat exchanger, (b) A third compartment which could act as an electrodialysis compartment, (c) Three-dimensional electrodes may be incorporated in the flow-across electrolyte mode, (d) Three-dimensional electrodes may be incorporated in a flow-through electrolyte mode. A = anolyte C = catholyte H = heat exchange fluid E = electrodialysis compartment. (Courtesy ElectroCell AB, with modifications). Fig. 2.29 Modifications to the fundamental electrolyte path of a filterpress cell, (a) A third compartment which could act as a heat exchanger, (b) A third compartment which could act as an electrodialysis compartment, (c) Three-dimensional electrodes may be incorporated in the flow-across electrolyte mode, (d) Three-dimensional electrodes may be incorporated in a flow-through electrolyte mode. A = anolyte C = catholyte H = heat exchange fluid E = electrodialysis compartment. (Courtesy ElectroCell AB, with modifications).
The success of the filterpress cell has been demonstrated for a diverse range of electrolytic applications, including large-scale water electrolysis and synthesis of adiponitrile. [Pg.150]

Filterpress cells are structurally more complex and require electrolyte circulation and gas-electrolyte separators external to the cell but they give enhanced space-time yields. Typically, bipolar filterpress units with various sizes give hydrogen delivery rates between 3 and 50m h" The important components are the anodes and cathodes based on perforated steel (perforated... [Pg.261]

In the case of filterpress cells, it was mentioned in Chapter 2 that the most common, practical method of enhancing mass transport is the use of plastic-mesh turbulence-promoters. It is rarely convenient to use such devices in metal-recovery cells due to the problems of the mesh being incorporated into the deposit or else promoting non-uniform deposits. One possibility is to utilize a porous electrode, such as a packed bed or a metal mesh or foam in these cases, the electrode itself acts as a turbulence promoter (in addition to providing a high electrode area per unit volume). [Pg.344]

The four sized modular cells of stacked plate and frame filterpress design are... [Pg.137]

The electrolysis in aqueous sulfuric acid with methanol as a cosolvent was perfomed in a filterpress membrane cell stack developed at Reilly and Tar Chemicals. Because of the low current density of the process, a cathode based on a bed of lead shot was used. A planar PbOa anode was used. The organic yield was 93% with approximately 1% of a dimer. The costs of the electrochemical conversion were estimated as one-half of the catalytic hydrogenation on a similar scale. [Pg.153]

Table 10. Comparison of filterpress reactor sizes for the electrosynthesis of L-cysteine hydrochloride. Catholyte = 2 M HC1 at 25°C j = 2 kAm 2 v = 0.35 ms 1 Pb cathode in presence of turbulence promotor DEM cell [13, p. 327J... Table 10. Comparison of filterpress reactor sizes for the electrosynthesis of L-cysteine hydrochloride. Catholyte = 2 M HC1 at 25°C j = 2 kAm 2 v = 0.35 ms 1 Pb cathode in presence of turbulence promotor DEM cell [13, p. 327J...
Stuart cell — Monopolar water - electrolysis tank cell employing plate electrodes with those of the same polarity connected in parallel resulting in a cell voltage of 1.7-2 V. Cells are connected in series, the inherent drawbacks of cells of the filterpress design (e.g., complicated sealing and interconnect devices) are avoided. [Pg.644]

Filterpress-type cell with a total cathode area of 8.3 m 1... [Pg.80]

Flexibility and versatility may be important, e,g. the duties of certain reactors may be altered relatively easily, within certain limits by, for example, increasing the rotational speed of a rotating electrode or incorporating an extra number of elements in a filterpress, plate cell geometry Alternatively,... [Pg.90]

Expansion of such a laboratory pilot cell to several plates in a filterpress arrangement may be used to check bipolar operation or the use of internal manifolds,... [Pg.169]

More than a dozen companies throughout the world oficr membrane cell technology and only two types of cell will be used to illustrate here the important features of the designs. Most membrane cells are based on a filterpress containing a series of plate and frame cells. Both monopolar and bipolar electrical connection is used. The basic structure of this type of cell is illustrated in Fig. 3.12 (note that the relative dimensions are not correct - membrane areas may be up to 2 x 2 m, although more normally I x I m, while the thickness of the electrolyte chambers is usually much less than 1 cm). The electrodes are vertical and constructed with louvres or from expanded metal so that the gases formed at the electrodes are directed to the back of the electrodes and do not stay in the... [Pg.196]

A complete filterpress stack of membrane cells will contain typically 50-100 cells and will be capable of producing up to 10000 tons of chlorine per year. [Pg.199]

There are two typical types of design for deutcriated or tritiated water electrolysis the filterpress and specialized low-volume cells. Examples arc shown in Fig. 5.3,... [Pg.257]

The scale of industrial water electrolysis is extremely wide ranging from small portable devices (e.g. 5 kW) through to process installations of 7 MW< Three types of water electrolyser based on tank cells, filterpress designs and the use of elevated pressure are presently manufactured in a range of sizes to meet the various markets described above. Tn addition, solid electrolyte cells are now becoming available. These variants are described below. [Pg.260]

Tank cells which are usually operated in a monopolar manner, have the advantages of simplicity, reliability and flexibility they do not require a rigorous gas-liquid separator or electrolyte circulation as do the filterpress designs. Figure 5.4 shows a typical version of the monopolar tank cell (the Stuart cell). A rectangular tank (e.g. nickel plated steel) contains alternate anodes and cathodes, which are made of rigid metal, closely spaced and parallel. All electrodes having... [Pg.260]

The two Monsanto processes are compared in Table 6A. It must be emphasized that the undivided cell stack is very much cheaper than the plate and frame cells in a filterpress. The need for membranes, electrolyte chambers, gasketing and much connecting pipework has been removed and, in fact the cost of the cell per unit area of cathode has been reduced by more than a factor of 10. This decreases the capital cost of the plant to such an extent that (when both capital and energy costs are taken into account) the optimum current density is lower for the undivided cell. [Pg.308]


See other pages where Filterpress cell is mentioned: [Pg.278]    [Pg.1777]    [Pg.357]    [Pg.357]    [Pg.654]    [Pg.278]    [Pg.1777]    [Pg.357]    [Pg.357]    [Pg.654]    [Pg.93]    [Pg.93]    [Pg.292]    [Pg.1784]    [Pg.93]    [Pg.466]    [Pg.148]    [Pg.169]    [Pg.200]    [Pg.258]    [Pg.263]    [Pg.276]    [Pg.279]    [Pg.369]   
See also in sourсe #XX -- [ Pg.168 ]




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Bipolar filterpress cell

Filterpress-type Flow Cells

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