Slurry reactor innovative

Conventional reactor technologies such as fixed beds and slurry reactors suffer from serious drawbacks. Mass transfer resistance is the crucial factor in the scaleup of processes. Laboratory experiments are often carried out with catalyst particles with diameters clearly less than 1 mm, whereas industrial reactors typically operate with larger catalyst particles ranging from 1 mm to 1 cm. The scale dimensions are illustrated in Figure 9.1. Intrinsic kinetics is thus inevitably coupled to the modeling of mass transfer, as has been illustrated in previous chapters. Internal mass transfer limitations can be suppressed by decreasing the particle size, but the particle sizes in industrial processes cannot be diminished limitlessly, because this would lead to a tremendous increase in the pressiue drop. To overcome this problem, new innovations and structured reactors have been developed, such as catalytic packing element reactors, monoliths, and fiber structures. The aim of these innovations has... 

For the photocatalytic reduction of CO2, in 1979, Inoue et al. introduced a slurry reactor in which catalysts were suspended in water [143]. Until 2000, slurry-type reactors were widely considered for reduction of CO2 under UV or visible irradiation. On the other hand, Tahir and Amin suggested that this type of reactor is not efficient for enhancing the photocatalytic activity due to the low surface area and complicated separation process required to isolate the miniature catalyst grains [144]. Furthermore, one of the UmitatirHis for CO2 photoreduction in the liquid phase is due to its low solubility in water. Therefore, Rossetti et al. developed an innovative cmicept of photoreactor, allowing to operate under high pressure (up to... 

United States Environmental Protection Agency. Superfund Innovative Technology Evaluation (SITE). EPA/540/S5-91/009. Pilot-scale demon-strationof a slurry-phase biological reactor for creosote-contaminated soil. Project Summary. United States Environmental Protection Agency, Cincinnati. 

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