US 2015/0308336 A1Published application

Carbonyls removal system

AssigneeSaudi Arabian Oil Company

InventorsGene YEH, Ibrahim AL-BABTAIN, Hussain AL-QAHTANI, Saeed AL-ALLOUSH

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Abstract

A method to limit the deposition of metals from a syngas stream on a gas turbine comprising the steps of feeding the syngas stream to a pressure swing adsorption vessel of a pressure swing adsorption system, the syngas stream comprises carbonyls, the pressure swing adsorption vessel configured to perform a pressure swing adsorption cycle: adsorbing the carbonyls on a carbonyl selective adsorbent, leaving a turbine feed stream, reducing the pressure of the pressure swing adsorption vessel to a purge pressure less than the adsorbing pressure, purging the carbonyls from the carbonyl adsorbed adsorbent to create a tail gas stream, re-pressurizing the regenerated carbonyl adsorbent to the adsorbing pressure, feeding the tail gas stream to an incinerator configured to oxidize the carbonyls in the tail gas stream to metal oxides and carbon dioxide, and feeding the turbine feed stream to the gas turbine.

Claims20

Dependent claims

A method to limit the deposition of metals, from a syngas stream generated by a gasifier, on a gas turbine, the method comprising the steps of:

feeding the syngas stream from an acid gas removal process to a pressure swing adsorption vessel of a pressure swing adsorption system, wherein the syngas stream comprises carbonyls, the pressure swing adsorption vessel configured to perform a pressure swing adsorption cycle, the pressure swing adsorption cycle comprising the steps of:
adsorbing the carbonyls from the syngas stream on a carbonyl selective adsorbent at an adsorbing pressure to create a carbonyl adsorbed adsorbent, wherein adsorbing the carbonyls generates a turbine feed stream;
reducing the pressure of the pressure swing adsorption vessel to a purge pressure, the purge pressure being less than the adsorbing pressure, wherein the carbonyls desorb from the carbonyl adsorbed adsorbent while the pressure is being reduced;
purging the carbonyls from the pressure swing adsorption vessel with a purge gas, wherein the purged carbonyls form a tail gas stream, wherein purging the carbonyls leaves a regenerated carbonyl adsorbent in the pressure swing adsorption vessel;
and
re-pressurizing the pressure swing adsorption vessel to the adsorbing pressure, wherein re-pressurizing the regenerated carbonyl adsorbent restores the carbonyl selective adsorbent;
feeding the tail gas stream to an incinerator, the incinerator configured to oxidize the carbonyls in the tail gas stream to metal oxides and carbon dioxide;
and
feeding the turbine feed stream to the gas turbine, the turbine feed stream having a target carbonyl contamination.

6 more elements

A system for power generation, the system comprising:

a gasifier, the gasifier configured to convert a fossil fuel feed to a dirty syngas stream, the dirty syngas stream comprising acid gases;
an acid gas removal process fluidly connected to the gasifier, the acid gas removal process configured to remove acid gases from the dirty syngas stream to create a syngas stream, the syngas stream comprising syngas, carbonyls, and contaminants;
a pressure swing adsorption system fluidly connected to the acid gas removal process, the pressure swing adsorption system configured to remove the carbonyls from the syngas stream, the pressure swing adsorption system comprising:
a pressure swing adsorption vessel, the pressure swing adsorption vessel configured to perform a pressure swing adsorption cycle, the pressure swing adsorption cycle comprising the steps of:
adsorbing the carbonyls from the syngas stream on a carbonyl selective adsorbent at an adsorbing pressure to create a carbonyl adsorbed adsorbent, wherein adsorbing the carbonyls generates a turbine feed stream, the turbine feed stream having a target carbonyl contamination;
reducing the pressure of the pressure swing adsorption vessel to a purge pressure, the purge pressure being less than the adsorbing pressure, wherein the carbonyls desorb from the carbonyl adsorbed adsorbent while the pressure is being reduced;
purging the carbonyls from the pressure swing adsorption vessel with a purge gas, wherein the purged carbonyls form a tail gas stream, wherein purging the carbonyls leaves a regenerated carbonyl adsorbent in the pressure swing adsorption vessel;
and
re-pressurizing the regenerated carbonyl adsorbent to the adsorbing pressure, wherein re-pressurizing the regenerated carbonyl adsorbent restores the carbonyl selective adsorbent;
an incinerator fluidly connected to the pressure swing adsorption vessel, the incinerator configured to oxidize the carbonyls in the tail gas stream to metal oxides and carbon dioxide;
and
a gas turbine fluidly connected to the pressure swing adsorption system, the gas turbine configured to generate power from the turbine feed stream.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/262,905Filed 28 Apr 2014
Published: 29 Oct 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification30 codes

F02C 3/20
Gas-turbine plants characterised by the use of combustion products as the working fluid: using a special fuel, oxidant, or dilution fluid to…
B01D 53/047
With stationary adsorbents: pressure swing adsorption
B01D 53/64
Removing components of defined structure: heavy metals or compounds thereof, e.g. mercury
C10K 1/003
Removal of contaminants: of acid contaminants, e.g. acid gas removal