A reactor, in particular for exothermic reactions, of the type including: a shell
(2) of substantially cylindrical shape, at least one catalytic bed (3)
in the shell, including a perforated cylindrical outer side wall (4), which
forms a free space (8) with the shell, and an inner side wall (5)
coaxial to the previous one, a heat exchanger (13) in the bed (3),
the heat exchanger (13) being formed by a plurality of tubes (15)
in the form of a spiral, a coil or alike in fluid communication with feed and discharge
collectors (14, 16) for a cooling fluid.
