In-line and selective phase separation of medium-chain carboxylic acids using membrane electrolysis

2015 ◽  
Vol 51 (31) ◽  
pp. 6847-6850 ◽  
Author(s):  
Jiajie Xu ◽  
Juan J. L. Guzman ◽  
Stephen J. Andersen ◽  
Korneel Rabaey ◽  
Largus T. Angenent
Keyword(s):  
Phase Separation ◽  
Carboxylic Acids ◽  
Membrane Electrolysis ◽  
Medium Chain ◽  
Electrolysis System

A membrane electrolysis system that was coupled with a bioreactor and pertraction system accomplished phase separation of oil, which consisted of >90% medium-chain carboxylic acids, without addition of chemicals.

scholarly journals Selective Extraction of Medium-Chain Carboxylic Acids by Electrodialysis and Phase Separation

ACS Omega ◽  
2021 ◽  
Author(s):  
Paula Andrea Hernandez ◽  
Miaomiao Zhou ◽  
Igor Vassilev ◽  
Stefano Freguia ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Phase Separation ◽  
Carboxylic Acids ◽  
Selective Extraction ◽  
Medium Chain

scholarly journals Direct medium-chain carboxylic-acid oil separation from a bioreactor by an electrodialysis/phase separation cell

2020 ◽  
Author(s):  
Jiajie Xu ◽  
Juan J.L. Guzman ◽  
Largus T. Angenent
Keyword(s):  
Phase Separation ◽  
Power Consumption ◽  
Electric Power ◽  
Electric Power Consumption ◽  
Chain Elongation ◽  
Separation Unit ◽  
Membrane Electrolysis ◽  
Medium Chain ◽  
In Series ◽  
Separation Cell

AbstractMedium-chain carboxylic acids (MCCAs) are valuable platform chemicals with numerous industrial-scale applications. These MCCAs can be produced from waste biomass sources or syngas fermentation effluent through an anaerobic fermentation process called chain elongation. We have previously demonstrated successful approaches to separate >90%-purity oil with several MCCAs by integrating the anaerobic bioprocess with membrane-based liquid-liquid extraction (pertraction) and membrane electrolysis. However, membrane electrolysis without pertraction was not able to separate MCCA oil. Therefore, we developed an electrodialysis/phase separation cell (ED/PS) and evaluated whether it can function as a stand-alone extraction and separation unit. First, we tested an ED/PS cell, which, when evaluated in series with pertraction, achieved a maximum MCCA-oil flux of 1,665 g d-1 per projected area (m2) (19.3 mL oil d-1) and a MCCA-oil transfer efficiency [100%*moles MCCA-oil moles electrons-1] of 74% at 15 A m-2. This extraction system demonstrated a ∼10 times lower electric-power consumption of 1.05 kWh kg-1 MCCA oil when compared to membrane electrolysis in series with pertration (11.1 kWh kg-1 MCCA oil) at 15 A m-2. Second, we evaluated our ED/PS as a stand-alone unit when integrated with the anaerobic bioprocess (without pertraction), and demonstrated that we can selectively extract and separate MCCA oil directly from chain-elongating bioreactor broth with just an abiotic electrochemical cell. We assumed that such a stand-alone unit would reduce capital and operating costs, but electric-power consumption increased considerably due to the lower MCCA concentrations in the bioreactor broth compared to the pertraction broth. Only a full techno-economic analysis will be able to determine whether the use of the ED/PS cell should be as a stand-alone unit or after pertraction.

scholarly journals Production of medium-chain carboxylic acids by anaerobic fermentation of glycerol using a bioaugmented open culture

2018 ◽  
Vol 118 ◽  
pp. 1-7 ◽  
Author(s):  
Rosemeri I. Dams ◽  
Michael B. Viana ◽  
Alexandre A. Guilherme ◽  
Camila M. Silva ◽  
André B. dos Santos ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Anaerobic Fermentation ◽  
Medium Chain

scholarly journals Temperature-Phased Conversion of Acid Whey Waste Into Medium-Chain Carboxylic Acids via Lactic Acid: No External e-Donor

Joule ◽  
2019 ◽  
Vol 3 (3) ◽  
pp. 885-888 ◽  
Author(s):  
Jiajie Xu ◽  
Jiuxiao Hao ◽  
Juan J.L. Guzman ◽  
Catherine M. Spirito ◽  
Lauren A. Harroff ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Carboxylic Acids ◽  
Medium Chain ◽  
Acid Whey

scholarly journals Temperature-Phased Conversion of Acid Whey Waste Into Medium-Chain Carboxylic Acids via Lactic Acid: No External e-Donor

Joule ◽  
2018 ◽  
Vol 2 (2) ◽  
pp. 280-295 ◽  
Author(s):  
Jiajie Xu ◽  
Jiuxiao Hao ◽  
Juan J.L. Guzman ◽  
Catherine M. Spirito ◽  
Lauren A. Harroff ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Carboxylic Acids ◽  
Medium Chain ◽  
Acid Whey

Phase separation of carboxylic acids on graphite surface at submonolayer regime

2009 ◽  
Vol 167 (1) ◽  
pp. 151-156 ◽  
Author(s):  
M. D. Alba ◽  
A. K. Bickerstaffe ◽  
M. A. Castro ◽  
S. M. Clarke ◽  
S. Medina ◽  
...  
Keyword(s):  
Phase Separation ◽  
Carboxylic Acids ◽  
Graphite Surface
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