Integrated process for filtering constituents from a gas stream
AssigneeLanzaTech, Inc.
InventorsRichard Rosin, Jason Greene, Taylor Schulz
Life of this patent
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Abstract
The invention provides a process for producing a fermentable gas stream from a gas source that contains one or more constituent which may be harmful to the fermentation process. To produce the fermentable gas stream, the gas stream is passed through a specifically ordered series of removal modules. The removal modules remove and/or convert various constituents found in the gas stream which may have harmful effects on downstream removal modules and/or inhibitory effects on downstream gas fermenting microorganisms. At least a portion of the fermentable gas stream is preferably capable of being passed to a bioreactor, which contains gas fermenting microorganisms, without inhibiting the fermentation process.
Claims28
A process for producing a fermentable gas stream from an input gas stream, the input gas stream comprising CO, CO2, or H2, or a combination thereof, the process comprising:
- a. passing the input gas stream to a hydrolysis module, wherein at least one constituent of the gas stream is removed and/or converted to provide a post-hydrolysis gas stream;
- b. passing the post-hydrolysis gas stream to an acid gas removal module, wherein at least one further constituent of the gas stream is removed and/or converted to produce an acid gas depleted stream;
- c. passing the acid gas depleted stream to a catalytic hydrogenation module, wherein at least one constituent from the acid gas depleted stream is removed and/or converted to produce a catalytic hydrogenation module effluent;
- and
- d. passing the catalytic hydrogenation module effluent to a deoxygenation module, wherein at least one further constituent is removed and/or converted to produce a fermentable gas stream.
A process for removing oxygen, acetylene, and hydrogen cyanide from an input gas stream, comprising reducing the oxygen to less than 100 ppm, reducing the acetylene to less than 1 ppm, and reducing the hydrogen cyanide to less than 1 ppm, by contacting the input gas stream with a sulfided catalyst comprising copper supported on alumina, silica, titania, ceria, lanthana, carbon, silica-alumina, or zeolites.
A process for producing a fermentable gas stream from an input gas stream, the input gas stream comprising CO, CO2, or H2, or a combination thereof, the process comprising:
- a. passing the input gas stream to an acid gas removal module, wherein at least one constituent of the gas stream is removed and/or converted to produce an acid gas depleted stream;
- b. passing the acid gas depleted stream to a catalytic hydrogenation module wherein at least one constituent from the acid gas depleted stream is removed and/or converted;
- and
- c. passing the acid gas depleted stream to a deoxygenation module, wherein at least one further constituent is removed and/or converted to produce a fermentable gas stream.
Dependencies are inferred from the claim text.