Scaleup Goals

The primary goal of scaleup is to maintain acceptable product quahty. Ideally, this will mean making exactly the same product in the large unit as was made in the pilot unit. To this end, it may be necessary to alter the operating conditions in the pilot plant so that product made there can be duplicated upon scaleup. If the pilot plant closely approaches isothermal piston flow, the challenge of maintaining these ideal conditions upon scaleup may be too difficult. The alternative is to make the pilot plant less ideal but more scaleable. 

In recent years, the use of coal as a raw material for the productions of hydrocarbons, liquid transportation fuels, chemical feedstocks and solid fuel is gaining importance. Tliree important processes for the achievement of this goal are (1) direct (2) removal of sulfur from coal by oxydesul-indirect coal liquefaction or the Fischer-All of these processes employ three-phase slurry reactors. In this overview, a present state of the art for the models, scaleup, design and other operational problems associated with these processes are briefly evaluated. 

This may require a change in the laboratory-scale operating conditions so that the product is economically achievable in a commercial process. The intentional lessening of product goals in the laboratory or pilot plant to enable economic scaleup is called diplomatic scaleup because it may require diplomacy to convince the bench chemist and management. 

We can apply the same approach to design of industrial reactors While in a pilot plant the goal is to measure R. accurately, here our goal is to reduce the risk of scaleup ... 

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