CO2 mass transfer and conversion to biomass in a horizontal gas–liquid photobioreactor

Valiorgue, Pierre; Hadid, H. Ben; Hajem, Mahmoud El; Rimbaud, Loup; Muller‐Feuga, Arnaud; Champagne, Jean‐Yves

doi:10.1016/j.cherd.2014.02.021

Cited by 16 publications

(8 citation statements)

References 17 publications

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“…Solubility of CO 2 in several phosphonium‐ and ammonium‐based DESs with different hydrogen bond donors (HBDs) at 25 °C and about 10 bar were reported by Ali et al . The same group later analyzed the operating conditions for CO 2 capturing process using these DESs . Phase behavior of (alkylammonium chloride + lactic acid) DESs using perturbed‐chain statistical associating fluid theory (PC‐SAFT) were modeled by Held, Kroon and coworkers .…”

Section: Introductionmentioning

confidence: 99%

Superbase‐Added Choline Chloride‐Based Deep Eutectic Solvents for CO₂ Capture and Sequestration

Bhawna

Pandey

2017

ChemistrySelect

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Deep eutectic solvents (DESs) have emerged as inexpensive and environmentally‐benign liquid media for potential usage in chemical sciences. CO2 capture and sequestration by various substances is an active area of research in green chemistry. CO2 capture ability of DES‐based systems composed of salt choline chloride mixed with hydrogen bond donors urea (named reline), ethylene glycol (named ethaline), and monoethanolamine (named MEACC), are assessed in the absence and presence of three superbases: 1,5‐diazabicyclo[4.3.0]‐non‐5‐ene (DBN), 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU), and 1,5,7‐triazabicyclo[4.4.0]‐dec‐5‐ene (TBD), respectively. Addition of superbase is found to significantly increase the CO2 capture ability of the DESs reline and ethaline; for the DES MEACC, the CO2 capture ability is not changed much as monoethanolamine and MEACC on their own exhibit appreciable CO2 capture efficiency. It is found that the overall efficiency of CO2 capture is the best with superbase DBN as compared to DBU or TBD due to the lower steric hindrance around the imine structure. Presence of glycerol in the superbase‐added DESs results in decrease in CO2 capture ability due to significantly lower solubility of CO2 in glycerol. 13C NMR, FTIR and Raman spectroscopic measurements reveal that major part of the captured CO2 binds covalently to the electron‐rich functionalities present on the components of the DES with superbase assisting this association. The reversibility of the captured CO2 is assessed by introducing N2 gas into the CO2 captured superbase‐added DES system; it is found that only 21–25% CO2 by weight could be removed from the system through five cycles. Heating the CO2 captured superbase‐added DES system to 60 °C and 100 °C results in loss of only 23% and 35% CO2 by weight, respectively. Intramolecular excimer intensity of 1,10‐bis(1‐pyrenyl)decane and steady‐state fluorescence anisotropy of rhodamine 6G fluorescence probes effectively monitor the CO2 capture process as viscosity of the superbase‐added DES increases as more‐and‐more CO2 is captured. Efficiency, effectiveness, and robustness of superbase‐added DES‐based systems towards CO2 capture and sequestration is amply highlighted.

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Section: Introductionmentioning

confidence: 99%

Superbase‐Added Choline Chloride‐Based Deep Eutectic Solvents for CO₂ Capture and Sequestration

Bhawna

Pandey

2017

ChemistrySelect

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“…For microalgae grown in suspended cultures, processes with minimal CO 2 loss have been developed by employing experimentally validated models (Doucha and L ıvansk y, 2006;Rubio et al, 1999;Valiorgue et al, 2014;Yang, 2011). Their primary conclusion is that CO 2 utilization can be improved by increasing the mass transfer from the gas to the liquid (Doucha and L ıvansk y, 2006;Rubio et al, 1999;Valiorgue et al, 2014;Yang, 2011). For microalgal biofilm cultivation, however, processes with minimal CO 2 loss have not been developed, though it has been demonstrated that elevated CO 2 levels are required for maximal productivity (Blanken et al, 2014;Ji et al, 2013;Schultze et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Optimizing carbon dioxide utilization for microalgae biofilm cultivation

Blanken

Schaap

Theobald

et al. 2016

Biotech & Bioengineering

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The loss of carbon dioxide (CO ) to the environment during microalgae cultivation is undesirable for both environmental and economic reasons. In this study, a phototrophic biofilm growth model was developed and validated with the objective to maximize both CO utilization efficiency and production of microalgae in biofilms. The model was validated in growth experiments with CO as the limiting substrate. The CO utilization and biomass productivity were maximized by changing the gas flow rate, the number of biofilm reactors in series and gas composition. Based on simulations, the maximum CO utilization efficiency that was reached was 96% based on a process employing flue gas. The corresponding drop in productivity was only 2% in comparison to the non-CO limited reference situation. In order to achieve this, 25 biofilm reactors units, or more, must be operated in series. Based on these results, it was concluded that concentrated CO streams and plug flow behavior of the gaseous phase over the biofilm surface are essential for high productivity and CO utilization efficiency. Biotechnol. Bioeng. 2017;114: 769-776. © 2016 Wiley Periodicals, Inc.

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“…Although this study was the first to optimize CO 2 utilization for biofilm cultivations, the results are in the high range of results with suspension cultivations. Two studies demonstrated CO 2 utilization efficiencies around 70% without significant productivity penalties (Valiorgue et al 2014;Yang 2011). Other studies report CO 2 utilization efficiencies up to 95%, however, the implications for biomass productivity were not quantified (Doucha and Lívanský 2006;Rubio et al 1999).…”

Section: Maximization Of Co 2 Utilization and Biomass Productivity Bymentioning

confidence: 99%

“…Their primary conclusion is that CO 2 utilization can be improved by increasing the mass transfer from the gas to the liquid (Doucha and Lívanský 2006;Rubio et al 1999;Valiorgue et al 2014;Yang 2011). For microalgal biofilm cultivation, however, processes with minimal CO 2 loss have not been developed, though it has been demonstrated that elevated CO 2 levels are required for maximal productivity Ji et al 2013a;Schultze et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…For microalgae grown in suspended cultures, processes with minimal CO 2 loss have been developed by employing experimentally validated models (Doucha and Lívanský 2006;Rubio et al 1999;Valiorgue et al 2014;Yang 2011). Their primary conclusion is that CO 2 utilization can be improved by increasing the mass transfer from the gas to the liquid (Doucha and Lívanský 2006;Rubio et al 1999;Valiorgue et al 2014;Yang 2011).…”

Section: Introductionmentioning

confidence: 99%

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Microalgae production in a biofilm photobioreactor

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CO2 mass transfer and conversion to biomass in a horizontal gas–liquid photobioreactor

Cited by 16 publications

References 17 publications

Superbase‐Added Choline Chloride‐Based Deep Eutectic Solvents for CO₂ Capture and Sequestration

Superbase‐Added Choline Chloride‐Based Deep Eutectic Solvents for CO₂ Capture and Sequestration

Optimizing carbon dioxide utilization for microalgae biofilm cultivation

Microalgae production in a biofilm photobioreactor

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CO2 mass transfer and conversion to biomass in a horizontal gas–liquid photobioreactor

Cited by 16 publications

References 17 publications

Superbase‐Added Choline Chloride‐Based Deep Eutectic Solvents for CO2 Capture and Sequestration

Superbase‐Added Choline Chloride‐Based Deep Eutectic Solvents for CO2 Capture and Sequestration

Optimizing carbon dioxide utilization for microalgae biofilm cultivation

Microalgae production in a biofilm photobioreactor

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Product

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Superbase‐Added Choline Chloride‐Based Deep Eutectic Solvents for CO₂ Capture and Sequestration

Superbase‐Added Choline Chloride‐Based Deep Eutectic Solvents for CO₂ Capture and Sequestration