Methods and apparatus for recycling tail gas in syngas fermentation to ethanol

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12239939
APP PUB NO 20240123401A1
SERIAL NO

18397263

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention present provides a method (and suitable apparatus) to convert biomass to ethanol, comprising gasifying the biomass to produce raw syngas; feeding the raw syngas to an acid-gas removal unit to remove at least some CO2 and produce a conditioned syngas stream; feeding the conditioned syngas stream to a fermentor to biologically convert the syngas to ethanol; capturing a tail gas from an exit of the fermentor, wherein the tail gas comprises at least CO2 and unconverted CO or H2; and recycling a first portion of the tail gas to the fermentor and/or a second portion of the tail gas to the acid-gas removal unit. This invention allows for increased syngas conversion to ethanol, improved process efficiency, and better overall biorefinery economics for conversion of biomass to ethanol.

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Patent Owner(s)

  • LANZATECH, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hohman, Jerrod Louisville, US 10 366
Winter, John D Houston, US 33 375

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