Reactor Fauser-Montecatini

Converters with indirect cooling have been known since the early days of ammonia production, for example, the Fauser-Montecatini reactor [843], [844], [848], [867], [891]-[893], In this converter, tube coils between catalyst beds transfer the reaction heat to a closed hot water cycle under pressure, operating by natural draft. The hot water releases the absorbed heat in an external steam boiler generating about 0.8 t of steam per tonne of ammonia at about 45 bar (ca. 250 °C). 

Example 11.9 m-1 Simulation of a Fauser-Montecatini Reactor for High-Pressure Methanol Synthesis... 

Figure / Fauser-Montecatini methanol synthesis reactor (from Cappelli, et al. [95]).

Montedison, which originally participated in the Montecatini-Fauser joint venture to market a number of total-recycle variants, and now presents its IDR (Isobaric Double Recycle process) technique. This process operates at 20. 10 Pa absolute, around 190 to 200 0, with an N/C ratio of 4 to 5 in the reactor. Unconverted carbamate is decomposed in twn successive gas stripping steps, one with ammonia, and the second with C02. in the pressure conditions of urea synthesis, i.e. 20.10 Pa absolute. 

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