Metallic gauze technology

Packed metal gauze technology, which is in fact a monolithic reactor design, was used by Castaldi et al. [68] and Roychoudh-ury et al. [69] for the WGS reaction. Reformate surrogate containing 3.6 vol.% carbon monoxide was fed to a single-stage... 

The manufacture of nitric acid by the oxidation of ammonia on platinum-type metal gauzes uses a technology which has change little since its first introduction in 1902. Although the conversion proceeds with an efficiency in excess of 90%, the loss of... 

Lyubovsky and Roychoudhury reported the development of an autothermal reformer for methanol based upon the Microlith technology of Precision Combustion Inc. [190]. Two types of reactors were tested. The first reactor consisted of cylindrical metallic gauzes of 41-mm diameter, wash-coated with a precious metal catalyst and piled up to a total height of 6 mm. The reactor thus had a low volume of 8 cm and was operated at very high fiow rates (gas hourly space velocity up to 400 000 h ), which corresponded to a residence time of 3.5 ms [190]. The O/C ratio was varied from 0.05 to 0.58 and the S/C ratio between 0 and 2. Figure 7.2 shows the... 

The need to reduce metal losses during ammonia oxidation led to the development of a number of specialized technologies. The first was the substitution of alloy gauzes for pure platinum gauzes. Handforth and Tilley (143) demonstrated that platinum gauzes containing 10-20% Rh lost far less metal than pure platinum screens and were actually somewhat more active than pure... 

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