Trickle capital cost

The primary nses of trickle bed reactors are for hydrodesulfurization, hydrocracking, and hydrotreating of various high-boiUng petroleum fractions. The direct and capital costs are significantly less for trickle bed operation than for an equivalent hydrodesulfurization unit operating... 

To solve problems arising in Trickle Bed Reactors caused by exothermic reactions, the engineer must first identify the critical, limiting steps for the heat transfer by using ad hoc" criteria (discussed above), experimental tests and realistic models. Secondly, he must take steps to keep the micro and macro temperature gradients within acceptable limits for reactor productivity and stability. He must always consider the economics of the reactor, in terms of both initial capital investments and operating costs. 

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