Housing multi-channel

Reactor type Multi-plate-stack in cylindrical housing Reaction channel width depth length 700 pm 300 pm 50 mm... 

All other reactions designs are included in this category. Most of them comprise one multi-channel platelet embedded in a housing. 

Table 1.2 gives some of the reasons for the LGC setting up its automation team. The primary motivation was economic. LGC was often subject to constraints on staffing in parallel with large increases in analytical commitments. The introduction of cost-effective analyses, using mechanical or automatic instruments, reduces staff involvement and allows well qualified people to be released for the development of new analytical requirements. The analysis of beer samples by multi-channel continuous flow analyser [S, 6, 7] and the introduction of a mechanical solvent extraction and identification system to analyse and measure levels of quinizarin in gas oil, both for duty purposes, were prime examples [8], Both systems involved commercially available components and/or instruments integrated with modules designed and built in-house. 

Figure 3. Oat / iV/ge National Laboratory unsaturatedflow facility. The intact cores are contained in large polyvinyl chloride pipes, and a filter membrane was c ed to the sediments within a fabricated acrylic endcap at the lower boundary. Tension was maintained through the large white vacuum chambers, which also housed a fraction collector for samples of column effluent. Influent was delivered by a multi-channel pump at the upper boundary. Tensiometers, visible in the side of...

Liquid diffusivity is smaller than gas diffusivity by a factor of two orders of magnitude. Considering the typical size (a few mm) of a channel (internal side of a tubular membrane) or of the cavity on the other membrane side (between the membrane and the housing wall) the typical density and viscosity of solvents used in multi-phase reactions, high liquid phase flow rates have to be used in order to be in a turbulent regime (a high Reynolds number) which minimizes the effect of the external mass transfer limitations. 

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