Back to results
US 11,287,183 B2Granted
Method and plant for the purification of carbon dioxide using liquid carbon dioxide
AssigneeUnion Engineeering A/S
InventorRasmus Find
Life of this patent
Estimating the term…
Abstract
The present invention relates to an improved method for removing contaminants from a gaseous stream substantially comprising carbon dioxide. More specifically, the method comprises the step of subjecting the gaseous stream to an absorption step in which the absorbent is liquid carbon dioxide wherein the waste of carbon dioxide is minimized by utilizing a compressing means for generating a pressure difference between two streams in a reboiler.
Claims17
A carbon dioxide purification system, comprising:
- a purification column having a top with an outlet and a bottom;
- a reboiler in fluid communication with the outlet of the top of the purification column via a first pathway consisting of one or more pipes that carry a contaminant lean gaseous stream;
- a compressor in fluid communication with the reboiler and the purification column, wherein the compressor is provided downstream of the reboiler;
- a depressurizing valve in fluid communication with the bottom of the purification column and the reboiler;
- and
- a product line in fluid communication with the reboiler.
3 more elements
A carbon dioxide purification system, consisting essentially of:
- a reboiler;
- a purification column having a top and a bottom;
- a compressor;
- a product line;
- a plurality of pipes;
- and
- optionally, one or more pumps, valves and combinations thereof;
- wherein a first fluid flow path consists essentially of the purification column, the reboiler, pipes and, optionally, the one or more pumps, valves and combinations thereof and a second fluid flow path consists essentially of the purification column, the reboiler, the compressor, pipes and, optionally, the one or more pumps, valves and combinations thereof,
- wherein the top of the purification column is in fluid communication with the first fluid flow path and the bottom of the purification column is in fluid communication with the second fluid flow path,
- wherein the compressor is downstream of the reboiler, and
- wherein the first and second fluid flow paths are fluidly isolated from each other and in a heat exchange relationship with each other.
8 more elements
A method for producing purified carbon dioxide, the method comprising:
- feeding a first unpurified stream of carbon dioxide into a purification column having a top and a bottom;
- circulating a second unpurified stream of carbon dioxide from the bottom through a first fluid flow path consisting of the purification column, a reboiler heat exchanger, a compressor, pipes, and, optionally, one or more pumps, valves, and combinations thereof, wherein the compressor is downstream of the reboiler;
- and
- passing a purified stream of carbon dioxide from the top through a second fluid flow path consisting of the purification column, the reboiler heat exchanger, pipes, and, optionally, one or more pumps, valves, and combinations thereof, wherein the first and second fluid flow paths are fluidly isolated from one another and exchange heat with one another;
- wherein circulating the second unpurified stream of carbon dioxide from the bottom through the first fluid flow path of the reboiler heat exchanger comprises compressing the second unpurified stream of carbon dioxide downstream of the reboiler heat exchanger.
2 more elements
Dependencies are inferred from the claim text.