Method and apparatus for syngas fermentation with high CO mass transfer coefficient

A mass transfer coefficient and syngas technology, applied in mixers with rotating stirring devices, fermentation, bioreactors/fermenters for specific purposes, etc., to achieve the effect of increasing the mass transfer coefficient of volume CO

Inactive Publication Date: 2014-07-16
INEOS BIO SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Fermentations that utilize gaseous substrates to provide the carbon and energy source for fermentation are particularly ...

Method used

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  • Method and apparatus for syngas fermentation with high CO mass transfer coefficient
  • Method and apparatus for syngas fermentation with high CO mass transfer coefficient
  • Method and apparatus for syngas fermentation with high CO mass transfer coefficient

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Embodiment Construction

[0077] Carry out pilot plant scale fermentation to determine k L a. measured k L a is about 60g ethanol / (L·day) STY (space-time yield). k by forcing the reaction under mass transfer limiting conditions or zero dissolved CO concentration L an estimate of a. This is achieved by performing a momentary reduction in the gas flow rate or agitation rate so that the cells are in excess relative to the available gas. Under these conditions, the CO is reacted away once dissolved, making the reaction mass transfer limited. The CO dissolved in solution is the same as the difference between CO in the feed gas and CO in the product. In a mass transfer limited system, the difference is the mass transfer rate for the given conditions.

[0078] The basic equation used is k L a=C kla (P g / V l ) a v b sg

[0079] in

[0080] k L a = volume mass transfer coefficient (m 3 Gas / s / m 3 liquid)

[0081] C kla = constant for a given system

[0082] P g = Aerated mixer power consum...

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Abstract

A process and apparatus is provided which are effective for improving CO mass transfer. The process includes introducing syngas into a reactor vessel through a gas sparger located below a liquid level in the reactor vessel. The syngas being introduced at a flow rate effective for maintaining a pressure inside of the reactor vessel of at least about 1 psig. An agitation energy of about 0.01 to about 12 kWatts/m3 medium is provided. The process is effective for providing a volumetric CO mass transfer coefficient of about 100 to about 1500 per hour.

Description

[0001] This application claims priority to US Provisional Application Nos. 61 / 571,564 and 61 / 571,565, filed June 30, 2011, and 61 / 573,845, filed September 13, 2011, which are incorporated by reference in their entirety This article. technical field [0002] The present application provides methods and apparatuses for effectively enhancing carbon monoxide (CO) mass transfer. More specifically, factors including syngas quality, syngas injection, reactor pressure, and mixing are balanced to provide enhanced volumetric CO mass transfer coefficients during syngas fermentation. Background technique [0003] Anaerobic microorganisms can produce ethanol from carbon monoxide (CO) by fermentation of gaseous substrates. Fermentation using anaerobic microorganisms from the genus Clostridium produces ethanol and other useful products. For example, US Patent No. 5,173,429 describes Clostridium ljungdahlii ATCC No. 49587, an anaerobic microorganism that produces ethanol and acetate from ...

Claims

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Application Information

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IPC IPC(8): C12M1/02C12M1/04C12M1/06C12P7/06
CPCC12M21/12C12M29/06C12M29/08C12M29/18C12P7/06C12M21/04C12P7/54C12M27/02C12M29/04C12M29/26C12M47/02C12N1/20C12P7/065C12M1/04C12M27/00Y02E50/10Y02E50/30B01F23/231266B01F23/23123B01F27/192B01F27/86B01F27/90C12M41/26C12M41/30C12M41/32
Inventor 彼得·辛普森·贝尔青-焕·辜
Owner INEOS BIO SA
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