| CPC C07C 29/152 (2013.01) [B01J 8/04 (2013.01); B01J 4/002 (2013.01); B01J 2208/0084 (2013.01); B01J 2208/00902 (2013.01)] | 5 Claims |
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1. A system for methanol synthesis from a synthesis gas rich in hydrogen and CO2/CO comprising:
a first adiabatic reactor (11) arranged vertically in a cylindrical envelope (26), the first adiabatic reactor (11) with a structure comprising an inlet stream (10) joined to a first catalytic bed (12), one Venturi type mixing element (13) next to and connected to the first catalytic bed (12), a first divergent nozzle (14) next to and connected to the Venturi type mixing element (13) which is arranged to receive a mix of reactants and products from the first catalytic bed, quench the reactants and products and feed to a second catalytic bed (27) located next to and connected to the divergent nozzle (14) and one outlet stream (28) leaving from the second catalytic bed (27);
a first heat exchanger (15) connected to the outlet stream (28) downstream the reactor (11), the first heat exchanger (15) being arranged to receive the stream exiting the second catalytic bed (27);
a condenser (16) connected to the heat exchanger (15) downstream of the heat exchanger (15), the condenser (16) being arranged to receive a cooled stream of methanol and reactants exiting from the first heat exchanger (15);
a separator (18) connected to the condenser (16) downstream of the condenser (16), the separator (18) being arranged to receive a stream exiting from the condenser, separate reactants from products and feed the reactants as quench to Venturi type mixing element (13) and the first heat exchanger (15);
a first cold gas stream (19) joining the separator (18) to both the first heat exchanger (15) and the first Venturi type mixing element (13);
a first outlet stream (21) joining the heat exchanger (15) to a second adiabatic reactor (24);
the second adiabatic reactor (24) is arranged vertically in a cylindrical envelope, the second adiabatic reactor (24) comprises a structure receiving the first outlet stream (21), an additional catalytic bed (34), an additional Venturi type mixing element (35) next to and connected to the additional catalytic bed (34), an additional divergent nozzle (36) next to and connected to the additional Venturi type mixing element (35) which is arranged to receive a mix of reactants and products from the additional catalytic bed (34), quench the reactants and products and feed to a second additional catalytic bed (38) located next to and connected to the additional divergent nozzle (36) and an additional outlet stream (39) leaving the second additional catalytic bed (38);
an additional heat exchanger (40) connected to the additional outlet stream (39) downstream the second adiabatic reactor (24), the additional heat exchanger (40) being arranged to receive the stream exiting the second additional catalytic bed (38);
an additional condenser (41) connected to the additional heat exchanger (40) downstream the additional heat exchanger (40); the additional condenser (41) being arranged to receive a cooled stream of methanol and reactants exiting from the additional heat exchanger (40);
an additional separator (42) connected to the additional condenser (41) downstream the additional condenser (41), the additional separator (42) being arranged to receive a stream exiting from the additional condenser (41), separate reactants from products and feed the reactants as quench to additional Venturi type mixing element (35) and the additional heat exchanger (40);
an additional cold gas stream (37) joining the additional separator (42) to both the additional heat exchanger (40) and the additional Venturi type mixing element (35); and
a second outlet stream (25) leaving the second adiabatic reactor (24).
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