Engineering topics

Hoeger, Christopher

Publications and source records attributed to Hoeger, Christopher.

25 records · Page 2

DOE OSTI2019

System including a direct contact desublimating heat exchanger for reducing fouling

A process to prevent fouling using a desublimating heat exchanger is disclosed. An outlet stream from the desublimating heat exchanger may be split into a plurality of parallel streams. The parallel streams may be sent through other devices for performing a unit operation, and the devices for performing a unit operation may change the temperature of at least one of the parallel streams. Parallel streams of differing temperature may emerge from the devices for performing a unit operation. The parallel streams of differing temperature may be sent to a mixing chamber. A mixed stream of uniform temperature may emerge from the mixing chamber, and the mixed stream may be recycled back to the desublimating heat exchanger. The mixing chamber may be separate from the desublimating heat exchanger, or the parallel streams of differing temperature may be mixed in the desublimating heat exchanger.

Baxter, Larry↗

DOE OSTI2019

Hydrocyclone for cryogenic gas-vapor separation

A hydrocyclone for separating a vapor from a carrier gas is disclosed. The hydrocyclone comprises one or more nozzles. A cryogenic liquid is injected to a tangential feed inlet at a velocity that induces a tangential flow and a cyclone vortex in the hydrocyclone. The carrier gas is injected into the cryogenic liquid, causing the vapor to dissolve, condense, desublimate, or a combination thereof, forming a vapor-depleted carrier gas and a vapor-enriched cryogenic liquid. The vapor-depleted carrier gas is drawn through a vortex finder and the vapor-enriched cryogenic liquid is drawn through an apex nozzle outlet. In this manner, the vapor is removed from the carrier gas.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗

DOE OSTI2019

Method for removal of a foulant from a carrier gas in a single vessel using cryogenic liquids

A method for removal of a foulant from a carrier gas is disclosed. A solids conveyance device that spans a vessel is provided, comprising an enclosed section and a filtering section. A cryogenic liquid and the carrier gas are provided to the enclosed section. The foulant condenses, dissolves, or desublimates into the cryogenic liquid, forming a cryogenic slurry and a foulant-depleted carrier gas entrained in the cryogenic slurry. The solids conveyance device advances the cryogenic slurry into the filtering section. The foulant-depleted carrier gas leaves the vessel through an upper portion of the permeable exterior wall and a warmed cryogenic liquid is removed from the cryogenic slurry through a lower portion of the permeable exterior wall, resulting in a solid foulant that is passed out of the solids outlet. In this manner, the foulant is removed from the carrier gas.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗

DOE OSTI2019

Method for using a hydrocyclone for cryogenic gas vapor separation

A method for separating a vapor from a carrier gas is disclosed. A hydrocyclone is provided with one or more nozzles on the wall of the hydrocyclone. A cryogenic liquid is provided to the tangential feed inlet at a velocity that induces a tangential flow and a cyclone vortex in the hydrocyclone. The carrier gas is injected into the hydrocyclone through the one or more nozzles. The vapor dissolves, condenses, desublimates, or a combination thereof, forming a vapor-depleted carrier gas and a vapor-enriched cryogenic liquid. The vapor-depleted gas is drawn through the vortex finder while the vapor-enriched cryogenic liquid is drawn through the apex nozzle outlet. In this manner, the vapor is removed from the carrier gas.

42 ENGINEERING↗

DOE OSTI2019

Method for using an air-sparged hydrocyclone for cryogenic gas vapor separation

A method for separating a vapor from a carrier gas is disclosed. An air-sparged hydrocyclone is provided with a porous sparger covered by an outer gas plenum. A cryogenic liquid is provided to the tangential feed inlet at a velocity that induces a tangential flow and a cyclone vortex in the cyclone. The carrier gas is injected into the air-sparged hydrocyclone through the porous sparger. The vapor dissolves, condenses, desublimates, or a combination thereof, forming a vapor-depleted carrier gas and a vapor-enriched cryogenic liquid. The vapor-depleted gas is drawn through a vortex finder while the vapor-enriched cryogenic liquid is drawn through an apex nozzle outlet. In this manner, the vapor is removed from the carrier gas.

Baxter, Larry↗

DOE OSTI2018

Evaluation of Cryogenic Systems for Post Combustion CO2 Capture

Cryogenic capture of carbon dioxide from flue gas streams is one potential pathway to reduce the CO2 emissions from power plants and industrial sources. In this paper, a minimum energy analysis of idealized cryogenic carbon capture processes is performed. Parametric studies on this idealized process are quantified to study the effect of minimum capture temperature and simulated heat exchange approach temperatures. The theoretical and practical difficulties in approaching this ideal process are described and discussed. Finally, the Sustainable Energy Solutions External Cooling Loop Cryogenic Carbon Capture™ process is evaluated and compared to the idealized carbon-capture process.

20 FOSSIL-FUELED POWER PLANTS↗

DOE OSTI2017

Optimized heat exchange in a CO2 de-sublimation process

The present invention is a process for removing carbon dioxide from a compressed gas stream including cooling the compressed gas in a first heat exchanger, introducing the cooled gas into a de-sublimating heat exchanger, thereby producing a first solid carbon dioxide stream and a first carbon dioxide poor gas stream, expanding the carbon dioxide poor gas stream, thereby producing a second solid carbon dioxide stream and a second carbon dioxide poor gas stream, combining the first solid carbon dioxide stream and the second solid carbon dioxide stream, thereby producing a combined solid carbon dioxide stream, and indirectly exchanging heat between the combined solid carbon dioxide stream and the compressed gas in the first heat exchanger.

42 ENGINEERING↗