Air Products and Chemicals, Inc.

William P Hegarty

William Paul Schmidt

Michael S Chen

William A Steyert, Deceased

Rodney John Allam

David M Nicholas

James G Hansel

Robert B Moore

David W Studer

Anthony A Cassano

Jack L Stolz

By Lila Steyer, Executrix

Thomas C Bono

Edward J Tirados

Ioannis A Antonas

An oxygenated organic liquid product and a fuel gas are produced from a portion of synthesis gas comprising hydrogen, carbon monoxide, carbon dioxide, and sulfur-containing compounds in a integrated feed treatment and catalytic reaction system. To prevent catalyst poisoning, the sulfur-containing compounds in the reactor feed are absorbed in a liquid comprising the reactor product, and the resulting sulfur-containing liquid is regenerated by stripping with untreated synthesis gas from the reactor. Stripping offgas is combined with the remaining synthesis gas to provide a fuel gas product. A portion of the regenerated liquid is used as makeup to the absorber and the remainder is withdrawn as a liquid product. The method is particularly useful for integration with a combined cycle coal gasification system utilizing a gas turbine for electric power generation.

Integrated production of fuel gas and oxygenated organic compounds from

A turbocharged or supercharged internal combustion motive system for utilization of gaseous fuel stored as a liquid wherein the liquefied gaseous fuel is vaporized and warmed at least partially with heat removed from the compressed intake combustion air in the turbocharger or supercharger aftercooler. In a preferred embodiment, the compressed intake combustion air is first cooled in an aftercooler against an ambiently cooled coolant and is subsequently cooled in further aftercooler heat exchange passages against an intermediate coolant which transfers heat removed from the compressed intake combustion air to the liquefied gaseous fuel. Embodiments are disclosed wherein the saturated liquefied gaseous fuel is first subcooled and then pumped to pressures high enough for direct combustion chamber injection and another embodiment discloses vaporization of the saturated liquefied gaseous fuel with compression of the vaporized gas in a compression-type injection system or by low pressure carburetion into the internal combustion engine.

Internal combustion engine with cooling of intake air using

A process for recovery of hydrogen sulfide-free fuel, while maintaining desirable carbon dioxide for combustion in a gas turbine to recover power in an integrated gasification combined cycle power plant and obtaining a rich hydrogen sulfide Claus plant feed gas is described.

Process for sulfur removal and recovery from a power generation plant

A process is provided for extracting high purity oxygen from a gas generator turbine exhaust stream by passing the turbine exhaust over the feed side of solid electrolyte membrane selective to the permeation of oxygen over other components of the exhaust stream to separate the oxygen from the exhaust stream, and removing the oxygen product stream from the permeate side of the membrane. The reject exhaust stream is then passed through a power generating turbine to recover net power.

Oxygen recovery from turbine exhaust using solid electrolyte membrane

The present invention relates to an improvement to a process for the removal of acid gases from a feed stream containing acid gases in which the feed gas is cooled and countercurrently contacted with a liquid absorbent in an absorber tower and the spent absorbent is regenerated by distillation wherein dissolved acid gases are stripped from the spent absorbent thereby producing a regenerated liquid absorbent and recycled to the absorber tower. The improvement, which is for the production of a product which is essentially free of sulfur containing compounds and has a reduced concentration of carbon dioxide, comprises the following steps: (a) compressing the acid gas-lean product gas to an elevated pressure and cooling the resultant compressed portion; (b) countercurrently contacting the elevated pressure, cooled, acid gas-lean product gas of step (a) and the regenerated liquid absorbent in a second absorber, thereby producing the product, which is essentially free of sulfur containing compounds and has a reduced concentration of carbon dioxide, at the top of the second absorber and a partially spent absorbent at the bottom of the second absorber, wherein said second absorber is operated at a higher pressure than the operating pressure of said absorber tower; (c) recovering the product, which is sulfur containing compounds and has a reduced concentration of carbon dioxide; and (d) using the partially spent absorbent to contact with the feed gas in the absorber tower.

Cascade acid gas removal process

A process is provided for extracting high purity oxygen from gas turbine exhaust streams by passing the gas turbine exhaust over the feed side of solid electrolyte membrane selective to the permeation of oxygen over other components of the exhaust stream to separate the oxygen from the exhaust stream, and removing the oxygen product stream from the permeate side of the membrane.

A process for recovery of hydrogen sulfide-free fuel, while maintaining desirable carbon dioxide for combustion in a gas turbine to recover power in an integrated coal gasification combined cycle power plant and obtaining a rich hydrogen sulfide Claus plant feed gas is described.

Process for sulfur removal and recovery from fuel gas using physical

A process and system are set forth for improving an oxygen-enriched Claus process by introducing a sulfuric acid stream into the reaction furnace to moderate oxygen-induced high temperatures which allow oxygen-enrichment and attendant throughput in the Claus process to higher levels than heretobefore practiced.

Oxygen enriched claus system with sulfuric acid injection

A method is set forth for the generation of net power and the recovery of by-product oxygen-enriched gas at low power requirements. Air is compressed to elevated temperature and pressure, at least a portion of the air is combusted and a portion of the oxygen is removed from the air or combustion effluent through a membrane or adsorbent before the oxygen lean combustion effluent is expanded through a turbine to recover power for the process and net power.

Process for producing by-product oxygen from turbine power generation

A unique process arrangement is disclosed wherein the effluent flue gas from the removal of hydrocarbonaceous coke from particulate matter by combustion in a mixture of pure oxygen diluted with carbon dioxide is processed to provide a carbon dioxide-rich recycle gas stream to be mixed with oxygen as regenerator feed gas; and a net combustion product stream from which are recovered SO.sub.x and NO.sub.x to eliminate atmospheric emissions, and a pure CO.sub.2 product for export. An alternate embodiment also produces hydrogen or synthesis gas for export.

Process for the recovery and recycle of effluent gas from the

A process is described for the separation of an off-gas from a synthetic fuels production process, such as oil shale retorting, coal gasification, oxygen fireflooding or carbon dioxide miscible flood enhanced oil recovery, into an essentially sulfur-free, light fuel gas and a sulfur containing carbon dioxide gas. The off-gas is contacted with methanol to remove the sulfur containing gases and is then cooled to separate out a light fuel gas from a predominantly carbon dioxide gas. The carbon dioxide gas is again contacted with the same methanol to scrub the latter of sulfur-containing gas and reabsorb the sulfur onto the carbon dioxide gas. The carbon dioxide gas can then be recycled to the synthetic fuels production process with deposition of the sulfur therein or the gas can be delivered for export with downstream sulfur treatment.

Process for separating carbon dioxide and sulfur-containing gases from a

A process is disclosed for the separation of carbon dioxide and sulfide gases from oil shale retort off-gases, coal gasification off-gases, oxygen fire-flooding or carbon dioxide miscible flood enhanced oil recovery off-gases for recycle to a retort, gasifier or petroleum reservoir or alternately delivery to another process. The process separates the off-gases into an essentially sulfur-free fuel gas and an acid gas for recycle to such a retort, gasifier or reservoir wherein the off-gas is compressed if necessary and cooled to separate the two streams, the acid gas is expanded in an auto refrigeration step to provide the necessary process refrigeration and the acid gas is then recycled to such a retort, gasifier or reservoir. In the oil shale retorting and coal gasification applications, the gas' sulfur constituents are sorbed on spent oil shale particles or coal ash.

Low energy process for separating carbon dioxide and acid gases from a

A process is described for the separation of carbon dioxide and sulfide gases from oil shale retorting off-gases, coal gasification off-gases, oxygen fireflooding off-gases or carbon dioxide miscible flood enhanced oil recovery off-gases for recycle to a retort, gasifier, petroleum reservoir or to further sulfide processing prior to export. The process separates the off-gases into an essentially sulfur-free light BTU fuel gas, a heavy hydrocarbon stream and a carbon dioxide acid gas stream wherein the off-gas is compressed if necessary and cooled to separate the various streams. The carbon dioxide acid gas stream is expanded in an auto-refrigeration step to provide the necessary process refrigeration. In the oil shale retort and coal gasification applications the sulfur constituents are sorbed on spent oil shale particles or coal ash.

Process for separating carbon dioxide and acid gases from a carbonaceous

This invention relates to a method for producing a hydrogen stream and a carbon dioxide stream from a mixed gas feedstock containing hydrogen, carbon dioxide, and contaminant sulfur compounds. The method comprises scrubbing the gas feedstock with a carbon dioxide laden solvent in an initial scrubbing zone under conditions such that not more than 70% of the carbonyl sulfide in the feedstock is removed in the initial zone, physically scrubbing the initially scrubbed feedstock with a solvent under conditions sufficient for removing substantially all the carbon dioxide and carbonyl sulfide therefrom to leave a pure hydrogen stream desorbing carbon dioxide and carbonyl sulfide and other gases from the liquid from the second scrubbing zone and then fractionating the resultant carbon dioxide stream containing hydrogen, carbon oxides, etc. to produce said carbon dioxide stream for use in urea synthesis.

Process for treating industrial gas stream

Process for treating synthesis gas to recover a purified essentially sulfur-free hydrogen-rich stream. The novel sequence of operations employed comprises initially removing from the feed gas, such as from a synthesis gas derived from partial oxidation of coal or oil, the bulk of contained H.sub.2 S and a substantial part of the contained COS, by physical absorption in a suitable solvent. The gas from the initial absorption is then subjected to water-gas shift reaction over a sulfur-resistant shift catalyst under conditions such that in addition to the conversion of CO to CO.sub.2 most of the contained COS hydrolyzed to H.sub.2 S. The gaseous shift product is then subjected to a second treatment with suitable solvent to remove by physical absorption essentially all of the remaining sulfur, which is then present as H.sub.2 S. The thus desulfurized gas mixture is then sent to a CO.sub.2 absorber, from which a H.sub.2 -rich gas effluent is withdrawn. The H.sub.2 S bearing solvent from the second treatment is used in the initial absorbtion. H.sub.2 S is stripped from the initial rich absorption bottoms liquid to recover a Claus gas effluent of high H.sub.2 S content, while the stripped liquid bottoms are recycled for further use in the process.

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Allentown, PA, United States of America

William P Hegarty