Adsorbing polynuclear aromatics from a reforming process using adsorbents containing iron
AssigneeUop LLC
InventorsManuela Serban, Mark P. Lapinski, Mark D. Moser
Life of this patent
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Abstract
An exemplary embodiment can be a process for removing one or more polynuclear aromatics from at least one reformate stream from a reforming zone. The PNAs may be removed using an adsorption zone. The adsorption zone can include first and second vessels each vessel containing an activated carbon adsorbent. Generally, the process includes passing the at least a portion of an effluent of the reforming zone through the first vessel containing a first activated carbon adsorbent wherein the first activated carbon adsorbent comprises iron.
Claims20
A process for adsorbing one or more polynuclear aromatics from at least one stream comprising reformate from a reforming zone using at least one adsorption zone, said process comprising:
- a) passing at least a portion of at least one stream comprising reformate from the reforming zone through the adsorption zone wherein the adsorption zone comprises an adsorbent which comprises activated carbon and iron;
- and
- b) recovering reformate from the reforming zone having a reduced concentration of polynuclear aromatics.
A process for generating a hydrocarbon reformate with a reduced amount of polynuclear aromatic compounds, said process comprising:
- (a) passing a heated hydrocarbon feed stream through a series of endothermic catalytic reforming reactors operated at a temperature of from about 427° C. to about 538° C. (about 800° F. to about 1000° F.) to reform said feed stream in the presence of a reforming catalyst to a hydrocarbon of higher octane value and to provide for a reforming reactor effluent containing polynuclear aromatic compounds;
- (b) contacting said reforming reactor effluent with a first adsorbent, comprising activated carbon and iron, effective to selectively adsorb the polynuclear aromatic compounds and to permit nonpolynuclear aromatic hydrocarbons to pass over the first adsorbent comprising activated carbon and iron without being adsorbed and to form a first adsorbent bed effluent stream having a reduced amount of polynuclear aromatic compounds;
- (c) passing the first adsorbent bed effluent stream to a final or second series of endothermic catalytic reforming reactors operated at a temperature of from about 427° C. to about 538° C. (about 800° F. to about 1000° F.) to reform the first adsorbent bed effluent stream to a hydrocarbon of higher octane value and to provide for a second reforming reactor effluent containing polynuclear aromatic compounds;
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- (d) recovering a hydrocarbon reformate having a reduced content of polynuclear aromatic compounds from the final or last of said series of reforming reactors.
Dependencies are inferred from the claim text.