Process for production of aromatics via pyrolysis of lignin-comprising material
AssigneeShell Oil Company
InventorsColin John Schaverien, Yunming Fang
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Abstract
This invention relates to a process for the conversion of a feedstock comprising a lignin-comprising material, comprising the steps (a) to (c): (a) charging the feedstock to a fluidized bed reactor; (b) pyrolyzing at least part of the feedstock in the fluidized bed reactor while introducing a carrier gas into the reactor, to produce pyrolysis vapors; (c) reacting at least part of the pyrolysis vapors coming from step (b) in a second reactor comprising a catalyst, to produce hydrocarbon products comprising aromatics.
Claims10
A process for the conversion of a feedstock comprising a lignin-comprising material, the process comprising:
- (a) charging the feedstock to a fluidized bed reactor comprising a heat carrier, wherein the heat carrier comprises sand;
- (b) pyrolyzing at least part of the feedstock in the fluidized bed reactor to produce pyrolysis vapours while introducing a carrier gas into the reactor,
- wherein the carrier gas comprises nitrogen and at least one of a C3 alkane and a C4 alkane;
- and
- (c) reacting at least part of the pyrolysis vapours coming from step (b) in a second reactor comprising a catalyst, to produce hydrocarbon products comprising aromatics, wherein the second reactor is a fixed bed reactor comprising a MFI or MWW zeolite catalyst;
- wherein the temperature in the fluidized bed reactor in step (b) is equal to or more than 400° C. to equal to or less than 600° C., the temperature in the reactor in step (c) is equal to or more than 350° C. to equal to or less than 550° C., and the temperature in the reactor in step (b) is kept higher than in the reactor in step (c).
Dependencies are inferred from the claim text.