Process to control nitrogen-containing compounds in synthesis gas
AssigneeSyntroleum Corporation
InventorJuan Inga
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Abstract
A process to control the amount of N-contaminant is synthesis gas which is fed into a Fischer-Tropsch reactor and which utilizes Fischer-Tropsch produced water is provided. A process which utilizes a countercurrent flow of Fischer-Tropsch produced water produced in a downstream Fischer-Tropsch reactor to wash syngas being fed to an upstream Fischer-Tropsch reactor is provided.
Claims19
A process to remove N-contaminants from a syngas stream comprising the steps of:
- (a) introducing a syngas stream and a water stream into a first absorber;
- (b) recovering a first-washed syngas stream overhead from the first absorber;
- (c) introducing the first-washed syngas stream and a Fischer-Tropsch produced water stream into a second absorber;
- and
- (d) recovering a second-washed syngas stream overhead from the second absorber.
A Fischer-Tropsch process comprising the steps of:
- (a) introducing a feed syngas stream into a first-stage Fischer-Tropsch reactor and recovering a first overhead stream comprised of Fischer-Tropsch produced water, hydrocarbon product and unreacted syngas from the first stage Fischer-Tropsch reactor;
- (b) separating the unreacted syngas component from the first overhead stream and introducing the unreacted syngas component into a second stage Fischer-Tropsch reactor;
- (c) recovering a second overhead stream comprised of Fischer-Tropsch produced water and hydrocarbon product from the second stage Fischer-Tropsch reactor;
- (d) separating the Fischer-Tropsch produced water from the second overhead stream;
- and
- (e) mixing the Fischer-Tropsch produced water separated in step (d) with the first overhead stream.
In a Fischer-Tropsch process wherein a synthesis gas is catalytically converted into a Fischer-Tropsch reaction product mixture and wherein two or more Fischer-Tropsch reactors are used in the process, the process improvement comprising:
- (a) separating Fischer-Tropsch produced water from the Fischer-Tropsch reaction product mixture of a first Fischer-Tropsch reactor;
- and
- (b) mixing the separated Fischer-Tropsch water from step (a) with the feed to a second Fischer-Tropsch reactor wherein the second Fischer-Tropsch reactor is the same as the first Fischer-Tropsch reactor or is located upstream of the first Fischer-Tropsch reactor.
The process of claim 16 further comprising the step of mixing the first and second nitrogen-enriched streams together.
Dependencies are inferred from the claim text.