Method for carrying out chemical reactions in pseudo-isothermal conditions
View Patent ↗Method for carrying out in continuous, under so-called pseudo-isothermal conditions and in a predetermined reaction environment, such as a catalytic bed, a selected chemical reaction, comprising the steps of providing in the reaction environment at least one tubular heat exchanger fed with a first flow of a heat exchange operating fluid at a respective predetermined inlet temperature, the fluid passing through the at least one tubular heat exchanger according to a respective inlet/outlet path, which method also provides the step of feeding into the at least one tubular heat exchanger and at one or more intermediate positions of said path, a second flow of operating fluid having a respective predetermined inlet temperature.
1. A method for carrying out in continuous, under pseudo-isothermal conditions and in a predetermined reaction environment, a selected chemical reaction, comprising the steps of:
feeding a first flow of a heat exchange operating fluid at a respective predetermined inlet temperature in at least one tubular heat exchanger provided in said reaction environment, said fluid passing through said at least one tubular heat exchanger according to a respective inlet/outlet path, and
feeding into said at least one tubular heat exchanger and at one or more intermediate positions of said path, a second flow of operating fluid having a respective predetermined inlet temperature.
2. A heat exchanger comprising:
a tubular element,
a chamber defined within said tubular element for being passed through by a first flow of a heat exchange operating fluid,
a fluid distributor duct, and
a fluid collector duct connected to said tubular element and in fluid communication with said chamber,
an additional distributor of a second flow of said operating fluid in fluid communication with said chamber, and
a feeding duct of said second flow of operating fluid in fluid communication with said additional distributor.
3. The heat exchanger according to claim 2 , wherein said additional distributor is supported within said tubular element and is provided with a least a hole in fluid communication with said chamber at a predetermined distance between said fluid distributor duct and said fluid collector duct.
4. The heat exchanger according to claim 3 , wherein said additional distributor is tubular shaped, closed at one end thereof and connected to said feeding duct at an opposite end thereof.
5. The heat exchanger according to claim 4 , wherein said feeding duct is supported within said fluid distributor duct or said fluid collector duct.
6. The heat exchanger according to claim 3 , wherein said additional distributor extends for substantially the entire length of said tubular exchanger.
7. The heat exchanger according to claim 3 , wherein said additional distributor is provided with a plurality of said holes arranged in rows at respective predetermined distances between said fluid distributor duct and said fluid collector duct.
8. The heat exchanger according to claim 4 , wherein the diameter of said additional distributor varies along its length.
9. The heat exchange unit for pseudo-isothermal reactors, comprising at least one tubular heat exchanger according to claim 2 .
10. A pseudo-isothermal chemical reactor comprising a catalytic bed and a heat exchange unit according to claim 9 provided therein.